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153
Ecosystems & Communities: Organisms and their Environments 1

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Ecosystems amp Communities Organisms and their Environments

1

Ecosystems have living and non-

living components

What are ecosystems

2

What is an Ecosystem

bull A community of biological organisms plus the non-

living components with which the organisms interact

bull Living organisms are not self-sufficient They need

energy and raw materials

3

4

5

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecosystems have living and non-

living components

What are ecosystems

2

What is an Ecosystem

bull A community of biological organisms plus the non-

living components with which the organisms interact

bull Living organisms are not self-sufficient They need

energy and raw materials

3

4

5

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

What is an Ecosystem

bull A community of biological organisms plus the non-

living components with which the organisms interact

bull Living organisms are not self-sufficient They need

energy and raw materials

3

4

5

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

4

5

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

5

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

What is an Ecosystem

bull The biotic environment consists of all the living

organisms within an area and is often referred to as

a community

bull The abiotic (aka non-living or physical) environment

often referred to as the organismsrsquo habitat consists of

bull the chemical resources of the soil water and air

such as carbon nitrogen and phosphorus

bull the physical conditions such as the temperature

salinity (salt level) moisture humidity and energy

sources

6

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

7

Soil erosion on a

trail in the

Adirondack

mountains

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Which scenario below exemplifies an

ecosystem

1 A group of organisms of the same species living in the same place at the same time

2 Different species interacting together at the same place and time

3 Different species interacting with each other at the same time in a desert

4 A smaller species living on a larger species in a mutually beneficial relationship

8

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-Home Message

bull An ecosystem is all of the living organisms in a habitat

as well as the physical environment

bull Ecosystems are found not just in obvious places such as

ponds deserts and tropical rainforests but also in some

unexpected places like the digestive tracts of organisms

or the shell of a beetle

9

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Challenge Question

bull An ecosystem is made of two components the biotic

environment or community consisting of the living

organisms within an area and the physical environment

or the habitat in which these organisms live

bull A habitat consists of its chemical resources of the soil

water and air as well as its physical conditions

bull List some of the aspects that make up the physical

conditions of a habitat

10

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecosystems have living and non-

living components

A variety of biomes occur around the

world each determined by temperature

and rainfall

11

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

A variety of biomes occur around the world

each determined by temperature and

rainfall

bull What is the average temperature

bull What is the average rainfall (or other precipitation)

bull Is the temperature relatively constant or does it vary

seasonally

bull Is the rainfall relatively constant or does it vary

seasonally

12

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

13

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

14

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

15

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest

bull forest of tall trees in a region of year-round warmth

bull ~ 125 to 660 cm yearly rainfall

bull temperature ranges from 20 degC - 34 degC

bull average humidity 77 - 88

bull rainfall gt 250 cmyear (may be a brief dry season)

bull almost all rain forests lie near the equator

16

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest

bull lt 6 of Earths land surface

bull gt 50 of all the worlds plant and animal species live in

tropical rain forests

bull produce ~40 of Earths oxygen

bull ~70 of the plants in the rainforest are trees

bull ~25 of all the medicines we use come from rainforest

plants

17

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest

18

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Indicator Species

bull any biological species that defines a trait

or characteristic of the environment

bull may delineate an ecoregion

bull could indicate an environmental condition such as

a disease outbreak pollution species competition

or climate change

bull can be among most sensitive species in a region

sometimes act as early warning to monitoring biologists

19

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest ndash Indicator Plant Species

20

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest ndash Indicator Animal Species Gorilla

Gorilla gorilla

Orangutan (Pongo pygmaeus)

Spider Monkey

Ateles geoffreyi

21

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest ndash Indicator Animal Species 2-toed sloth

Cholepus

hoffmanni

Three-toed Sloth (Bradypus

variegatus) with baby - Costa Rica 22

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tropical Rain Forest ndash Indicator Animal Species

Collared Aracari

Pteroglossus torquatus

23

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands (Prairie)

bull 2 different types

bull tall-grass humid amp very wet

bull short-grass dry hotter summers and colder winters

than the tall-grass prairie

bull found in middle latitudes in the interiors of continents

bull either moist continental climates or dry subtropical

climates

bull Argentina ndash grasslands are known as pampas

bull Russia ndash steppes

bull grasslands in southern hemisphere tend to get more

precipitation than those in the northern hemisphere

24

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands (Prairie)

25

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands (Prairie)

bull temperatures range from -40deg F 70deg F

bull growing season and a dormant season

bull growing season is when there is no frost and plants

can grow (which lasts from 100 to 175 days)

bull tropical and subtropical grasslands the length of

the growing season is determined by how long the

rainy season lasts

bull temperate grasslands the length of the growing

season is determined by temperature (ge 50deg F)

bull dormant (not growing) season nothing can grow

because its too cold

26

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands (Prairie)

bull average rainfall per year ranges from 10 - 30 inches

bull tropical and sub-tropical grasslands average rainfall

per year ranges from 25 - 60 inches

bull amount of rainfall is very important in determining which

areas are grasslands

bull hard for trees to compete with grasses in places

where the uppers layers of soil are moist during part

of the year but where deeper layer of soil are always

dry

27

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands (Prairie)

28

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslandsndash Indicator Plant Species Old Field Habitat Ohio

Grassland North Dakota

Ironweed

(Vernonia sp) with

Hedge Bindweed

Vine (Calystegia sepium) 29

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslandsndash Indicator Plant Species

Ironweed (Vernonia sp)

Joe Pye Weed

Eupatorium purpureum

30

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands ndash Indicator Plant Species

Common Teasel

Dipsacus fullonum Queen Annes Lace (Daucus carota)

31

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands ndash Indicator Animal Species

Bison (Bison bison) on the range

Theodore Roosevelt National Park North

Dakota

32

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands ndash Indicator Animal Species

Przewalskis horse (Equus caballus

przewalskii) The Wilds Ohio

33

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Grasslands ndash Indicator Animal Species

34

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga

bull Russian word for forest

bull largest biome in the world

bull Eurasia North America

bull located just below the tundra biome

bull many coniferous trees

bull aka boreal forest Boreal was the Greek goddess of the

North Wind

35

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga

bull winter temperature range is -54 to -1deg C (-65 to 30deg F)

bull summer -7deg C (20deg F) to 21deg C (70deg F)

bull summers are very short (50 - 100 frost free days)

bull average yearly precipitation 30 - 85 cm (12 - 33 in)

bull main seasons are winter and summer

bull spring and autumn are very short

bull weather is either hot and humid or very cold

36

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga

37

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga ndash Indicator Plant Species

Balsam Fir

Abies balsamea

Black Spruce

Picea mariana

38

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga ndash Indicator Plant Species

Jack Pine

Pinus banksiana

Paper Birch

Betula papyrifera

White Poplar

Populus alba

39

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga ndash Indicator Animal Species

American Black Bear

Ursus americanus

Bald Eagle

Haliaeetus leucocephalus 40

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Taiga ndash Indicator Animal Species

Long-eared Owl

Aiso otus

Snowshoe Rabbit

Lepus americanus

41

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert

bull cover about one fifth of Earths land surface

bull hot and dry near Tropic of CancerTropic of

Capricorn

bull cold near the Arctic

bull temperature

bull hot amp dry ~ 25deg C to ~ 49deg C

bull cold -2 to 4deg C (winter) 21 to 26deg C (summer)

bull precipitation

bull hot amp dry very little rainfall andor concentrated

rainfall in short periods between long rainless periods

(lt 15 cmyear)

bull cold 15 - 26 cmyear 42

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert

43

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Plant Species

44

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Plant Species

Saguaro Cactus

Carnegiea gigantea

Fishhook Cactus

Mammillaria microcarpa

45

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Plant Species

Trichomes

46

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Animal Species

Zebratail Lizard - Callisaurus draconides

47

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Animal Species

Rock hyrax (Procavia capensis) 48

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Desert ndash Indicator Animal Species

Bactrian Camel Camelus bactrianus

49

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

bull temperature 0 - 20 C

bull precipitation ~ 50 ndash 200 cmyear

50

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

51

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

Indicator Plant Species

Oaks (Quercus sp)

Dutchmans-Breeches

Dicentra cucullaria 52

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

Indicator Plant Species

Sassafras

Sassafras albidum

Redbud

Cercis canadensis

53

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest ndash Succession

bull orderly succession of communities to a climax

community (biome)

bull two main types of succession

bull primary succession begins with bare rock exposed

by geologic activity

bull secondary succession begins on soil from which

previous community has been removed (by fire

agriculture etc)

bull secondary succession can proceed much faster

because the soil has been prepared by the

previous community

54

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

Indicator Animal Species

American Toad

Bufo americanus

Box Turtle

55

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

Indicator Animal Species

Eastern Chipmunk

Tamias striatus

Eastern Gray Squirrel

Sciurus carolinensis

56

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Temperate Deciduous Forest

Indicator Animal Species

Yellow-breasted chat

Icteria virens 57

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra

bull annual average temperature lt 5 C

bull precipitation (mostly in the form of snow) lt 100 mmyear

bull summer is brief

bull temperatures above freezing last only a few weeks at

most

bull warm summer coincides with periods of almost 24

hour daylight so plant growth can be explosive

58

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra

Anaktuvuk Pass Alaska

59

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra ndash Indicator Plant Species

Arctic Tundra Wildflowers - Alaska

60

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra ndash Indicator Plant Species

Lichen

Polytrichum Moss

(photographed in Ohio not on the

Tundra)

61

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra ndash Indicator Animal Species

Reindeer

Rangifer tarandus

62

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Tundra ndash Indicator Animal Species

Caribou On Autumn Tundra Denali National Park Alaska

63

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Savanna

bull rolling grassland scattered with shrubs and isolated trees

bull found between a tropical rainforest and desert biome

bull not enough rain falls on a savanna to support forests

bull found in a wide band on either side of the equator on

the edges of tropical rainforests

bull warm temperature year round

bull very long dry season (winter) ~ 10 cm rain none at all

from Dec - Feb

bull very wet season (summer) ~ 35-65 cm rain

64

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Savanna

65

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Savanna ndash Indicator Plant Species

Baobab

Adansonia digitata Umbrella Thorn Acacia

Acacia tortillis

66

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Savanna ndash Indicator Animal Species

Savanna Elephant

Loxodonta africana

Black Mamba

Dendroaspis polylepis

Lion

Panthera leo

67

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Chaparral

bull winter mild and moist but not rainy

bull summer very hot and dry

bull annual temperature range between -1deg and 38deg C

bull annual precipitation ~ 25-45 cm mostly in the winter

68

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Chaparral

69

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Chaparral ndash Indicator Plant Species

Blue Oak

Quercus douglasii

Common Sagebrush

Artemisia tridentata

Olive Tree

Olea europaea

70

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Chaparral ndash Indicator Animal Species

Black-tailed Jackrabbit

Lepus californicus Golden Jackal

Canis aureus

Spotted Skunk

Spilogale gracilis

71

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Freshwater Biome

bull low salt concentration mdash usually less than 1

bull plants and animals in freshwater regions are adjusted to

the low salt content and would not be able to survive in

areas of high salt concentration (ie ocean)

bull 3 different types of freshwater regions

bull ponds and lakes

bull streams and rivers

bull wetlands

72

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Freshwater Biome ndash Ponds and Lakes

From left a view across Manzanita Lake toward Mt Lassen California a

forest pond near Donnelly Idaho a Great Blue Heron Paranagat Lake

southeastern Nevada

73

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Freshwater Biome ndash Streams and

Rivers

From left McArthur-Burney Falls State Park California trout Green

River Utah Brooks River Alaska

74

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Freshwater Biome - Wetlands

From left Pescadero Marsh California coastal marsh at Umpqua

Dunes Oregon trees and bogs on Esther Island Alaska

75

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Marine Biome

bull cover about three-fourths of the Earths surface

bull marine algae supply much of the worlds oxygen supply

and take in a huge amount of atmospheric carbon

dioxide

bull evaporation of the seawater provides rainwater for the

land

bull 3 different types of marine regions

bull oceans

bull coral reefs

bull estuaries

76

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Marine Biome - Oceans

From left mussels worms and a spider crab at a hydrocarbon seep

community in the Gulf of Mexico a sea fan and brain coral in the Florida

Keys National Marine Sanctuary a school of Atlantic amberjack off North

Carolina

77

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Marine Biome ndash Coral Reefs

From left reef life in the Gulf of Aqaba Red Sea a reef at Fanning

Island atoll in the central Pacific a reef in the Florida Keys National

Marine Sanctuary

78

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Marine Biome - Estuaries

From left Mangrove roots south Florida wetlands and tidal streams

in the Ashe Island area ACE Basin National Estuarine Research

Reserve South Carolina a salt marsh in Winyah Bay National

Estuarine Research Reserve South Carolina

79

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecological Notes

These are the biomes in order of their productivity (highest

first)

1 estuaries and tropical rain forest (highest)

2 temperate forest

3 agricultural land

4 temperate grassland

5 lakes and streams

6 coastal zone

7 tundra

8 open ocean

9 desert (lowest)

80

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecological Notes

In order to be productive and have a lot of living material

standing around (biomass) an ecosystem has to have 4

basic necessities for plant life to thrive (if there are

enough plants the ecosystem will also support a lot of

animals) The four things are

1 Sunlight

2 Nutrients

3 Warm temperatures

4 Water

81

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Biomes Video

82

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-Home Message

bull Biomes are the major ecological communities of earth

characterized mostly by the vegetation present

bull Different biomes result from differences in temperature

and precipitation and the extent to which they vary from

season to season

83

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Challenge Question

bull Terrestrial biomes are determined by the temperature

and precipitation amounts as well as whether those

factors are constant or vary by season

bull By contrast how are aquatic biomes determined

84

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Energy and chemicals flow within

ecosystems

Energy flows from producers to

consumers

85

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

86

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

87

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

First Stop Primary Producers

bull ecosystem producers or consumers

bull primary producers plants algae (some) bacteria

bull convert light energy from sun into chemical energy

through photosynthesis

bull chemical energy = food

bull consumers eat or absorb their food

bull energy stored in chemical bonds of carbohydrate

protein and lipid molecules is captured and

harnessed for consumersrsquo own movement

reproduction and growth

88

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Chain

89

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Web

90

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Web

91

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Chains amp Food Webs

bull A change in one link in a food chain will affect the other

links

bull The table on the next slide gives one example of a food

chain and the trophic levels represented in it

92

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Chains amp Food Webs

93

GRASS

GRASSHOPPER

TOAD

SNAKE

HAWK

BACTERIA

IN GENERAL

AUTOTROPHS

(PRODUCERS)

HERBIVORES

(PRIMARY

CONSUMERS)

CARNIVORES

(2 3 ETC)

DECOMPOSERS

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

94

Chain Reaction Game

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

95

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Energy Flows through a Food Web

bull Losses at every ldquosteprdquo in a food chain

bull Inefficiency of energy transfers

96

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Energy flow through a food chain

Energy flow refers to the way that energy is transformed through

a food chain (pictured here) containing a series of levels

including plants consumers predators and decomposers 97

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Amount of energy available at each of the

four levels of an ecosystem

Ecological pyramids illustrate the amount of energy

available at each of the four levels of an ecosystem 98

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecological Pyramid

99

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

A grasshopper eats a plant A mouse eats the

grasshopper A snake eats the mouse A hawk

could eat the snake or the mouse In this food

web how would we categorize the hawk

1 Producer

2 Primary consumer

3 Secondary consumer

4 Tertiary consumer

5 Quaternary consumer

6 4 and 5

100

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps

bull First it is converted to chemical energy in

photosynthesis

bull Herbivores then consume the primary producers the

herbivores are consumed by carnivores and the

carnivores in turn may be consumed by top carnivores

101

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-home message

bull Detritivores and decomposers extract energy from

organic waste and the remains of organisms that have

died

bull At each step in a food chain some usable energy is lost

as heat

102

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Energy and chemicals flow within

ecosystems

Energy pyramids reveal the inefficiency of

food chains

103

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Biomass

bull biomass total weight of all living organisms in a given

area

bull only about 10 of the plants in an ecosystem is

converted into biomass

bull Food Energy Pyramid

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

bull African savannas and grasslands sustain more species

of higher-order carnivores than any other terrestrial

ecosystem

104

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

105

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Food Energy Pyramids

bull flow of energy through a food chain

bull trophic level position that an organism occupies in a

food chain - what it eats and what eats it

106

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

107

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

108

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

You go out to eat at a fancy restaurant You

have a salad salmon and for dessert ice

cream Which part of the meal was the most

energy efficient food for you to eat

1 Salad

2 Salmon

3 Ice cream

4 2 and 3

109

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-home message

bull Energy from the sun passes through an ecosystem in

several steps known as trophic levels

bull Energy pyramids reveal that the biomass of primary

producers in an ecosystem tends to be far greater than

the biomass of herbivores

bull The biomass transferred at each step along the food chain tends to be only about 10 of the biomass of the organisms being consumed due to energy lost in cellular respiration

bull As a consequence of this inefficiency food chains rarely exceed four levels

110

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Energy and chemicals flow within

ecosystems

Essential chemicals cycle through

ecosystems

111

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Chemical Reservoirs

bull Each chemical is stored in a non-living part of the environment

bull Organisms acquire the chemical from the reservoir a non-living part of the environment

bull The chemical cycles through the food chain (biogeochemical cycles)

bull Eventually the chemical is returned to the reservoir

112

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Hydrologic Cycle and the Florida Springs

bull Click here for a description of how falling rain feeds underground aquifers in Florida and forms springs

113

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

The Most Important Chemical Cycles

1) Carbon

2) Nitrogen

3) Phosphorus

4) Sulfur

114

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

115

The

Carbon

Cycle

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

116

The Carbon Cycle

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Keeping Up With Carbon

NASA video provides key information on the carbon cycle

117

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

118

Carbon Cycle Game

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Fossil Fuels

bull created when large numbers of organisms die and are buried in sediment lacking oxygen

bull In absence of oxygen at high pressures and after very long periods of time organic remains are ultimately transformed into coal oil and natural gas

bull burning coal oil and natural gas releases large amounts of carbon dioxide

bull increases average CO2 concentration in the atmosphere

bull current level of CO2 in the atmosphere is the highest it has been in almost half a million years

119

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Global CO2 levels are rising in

general but they also exhibit a

sharp rise and fall within each

year ndash why

120

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

121

The Nitrogen Cycle

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

122

The Nitrogen Cycle

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Fertilizers

bull Because it is necessary for the production of every plant

protein and because all nitrogen must first be made

usable by bacteria plant growth is often limited by

nitrogen levels in the soil

bull For this reason most fertilizers contain nitrogen in a

form usable by plants

123

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

124

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

125

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

126

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

127

Oxygen reduction downstream of a source of

organic pollution

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

128

Algal growth and eutrophication in an Australian

outback waterway

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

129

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Sulfur Cycle

bull component of protein

bull cycles in both a gas and sedimentary cycle

bull source earths crust

bull enters the atmosphere as hydrogen sulfide (H2S)

during fossil fuel combustion volcanic eruptions

gas exchange at ocean surfaces decomposition

130

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Sulfur Cycle

bull H2S is immediately oxidized to sulfur dioxide (SO2)

bull SO2 + water vapor H2SO4 (falls to earth in rain)

bull sulfur in soluble form is taken up by plant roots

incorporated into amino acids such as cysteine

bull travels through food chain

bull eventually released through decomposition

131

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

How is carbon recycled back to the

atmosphere in the carbon cycle

1 It is ldquofixedrdquo by bacteria

2 It is a product of cellular respiration

3 Burning of fossil fuels

4 2 and 3

5 All of the above

132

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Why do commercial fertilizers usually

contain usable forms of nitrogen and

phosphorous

1 These chemicals are not efficiently recycled in

the soil

2 Nitrogen and phosphorous need to be ldquofixedrdquo

by bacteria or the plant

3 Nitrogen and phosphorous are found at high

levels in the atmosphere but not in the soil

4 Nitrogen and phosphorous only enter the soil

through erosion

133

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Take-home message

bull Chemicals essential to lifemdashincluding carbon nitrogen and phosphorusmdashcycle through ecosystems

bull They are usually captured from the atmosphere soil or water by growing organisms passed from one trophic level to the next as organisms eat other organisms and returned to the environment through respiration decomposition and erosion

bull These cycles can be disrupted as human activities significantly increase the amounts of the chemicals utilized or released to the environment

134

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Symbiotic Relationships

bull Symbiosis close relationship between organisms of

two different species

bull At least one participant gains some sort of benefit

(usually nutritional)

bull Types of symbiosis

bull Parasitism

bull Commensalism

bull Mutualism

bull Predation

135

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Symbiotic Relationships in the

Ocean

bull Click here for an explanation of the

relationships of marine animals

including sharks rays and various

fishes

136

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Parasitism bull Parasite derives nutrition from the host

bull This harms the host but a true parasite does

not usually kill its host (directly)

137

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ectoparasites

Remain outside the host

Ticks fleas leeches

138

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Endoparasites

Live inside the hostrsquos body

Tapeworms malarial parasites

139

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Parasite Transmission

bull Many parasites live on or in a single organism

bull Some will alternate between 2 or more host species

bull Vertical transmission ndash from mother offspring

bull Horizontal transmission ndash between members of a

population

bull Direct contact (head lice)

bull Vectors (mosquitos)

140

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

141

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Commensalism

bull Neither species is totally dependent on the other

bull One benefits ndash no effect on the other

bull Feeding or protection

bull Porcelain anemone crabs and anemones

142

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Mutualism

bull Both species benefit

bull Food or shelter

bull Examples

bull Plants and microbes (rhizobium in root nodules)

bull Plants and fungi (orchids and mycorrhizae)

bull Protists and fungi (lichen)

bull Plants and insects (pollination)

bull Animals and bacteria (ruminants)

bull Animals and other animals (crocodiles and

plover birds)

143

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Mutualism shrimp and moray

Cleaner shrimp cleaning a zebra moray eel Mutualistic

relationships such as these promote the well-being of the

host fishes and provide food for those that do the cleaning 144

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Rhizobium

Rhizobium in root nodules of certain plants convert

nitrogen in soil to usable form

145

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Orchid Mycorrhizae

Fungi aid the plant in the uptake of nutrients

Fungi ingest some of the food from plant

photosynthesis 146

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Lichen

Most of the lichen is composed of fungal filaments

but living among the filaments are algal cells

usually from a green alga or a cyanobacterium

The lichen fungus provides its partner(s) a benefit

(protection) and gains nutrients in return 147

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ruminants

Ruminants are characterized by their four-chambered

stomach and cud-chewing behavior Cud is a food bolus

that is regurgitated rechewed and reswallowed The

rumen is a large fermentation vat containing billions of

microorganisms including bacteria and protozoa which

allow ruminants to digest fibrous feeds such as grass and

hay that other animals cannot efficiently utilize 148

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Crocodiles amp

Plover Birds

The bird gets into the crocodiles mouth and picks out

the tiny bits of food stuck in his teeth then eats it (the

tiny bits)

This cleans the crocodiles teeth and keeps his mouth

fresh and free from infections 149

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Predation

bull Consumption of one living organism by

another

bull Predators must have offensive strategies

bull ways of finding catching and eating

their prey

bull Prey organisms must have defensive

strategies

bull ways of avoiding or discouraging this

activity

150

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Predation

bull Encompasses all levels within an

ecological food chainweb

bull plant-herbivore systems

bull herbivore-carnivore systems

bull three-way interactions of

interdependent plant-herbivore-

carnivore systems

151

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

This goshawk is the tertiary consumer in his ecosystem

and the mouse in his beak is the secondary consumer

Beneath the mouse on the ecological pyramid lies his

foodsource likely a worm which fed on the primary

producer leafy plants 152

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153

Ecosystem of Life in Floridas

Springs

bull Click here for a close-up look of life

in Floridas springs and the various

predator-prey interactions there

153