3 oct is this an alligator or a crocodile? agenda new seats food chains and webs homework have...
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3 Oct Is this an alligator or
a crocodile? Agenda
New Seats Food Chains and webs
Homework Have a great
weekend!
Do any of these vocab. terms look familiar?
Autotroph Heterotroph Trophic Level Producer Consumer Decomposer Herbivore Carnivore Omnivore
Organism Population Community Food Chain Food Web Food Pyramid Limiting factor
How well do you remember the levels
of organization?
-all organisms of the same species living within an area
Populations
Communitypopulations of different species that live in the same area
Feeding relationships
Community
Ecosystem- communities + abiotic factors
Living (Biotic) factors all plants & animals living in an
area Physical (Abiotic) factors
soil, rock, temperature, moisture, sunlight
biosphere
Ecosystem inputs (td2)
energy flowsthrough
nutrients cycle
Energy flows through ecosystems (Td1)
sun
producers (plants, alga, some
bacteria)producers (plants, alga, some
bacteria)
loss of energy
loss of energy
secondary consumers(carnivores)
secondary consumers(carnivores)
primary consumers(herbivores)
primary consumers(herbivores)
Food Chains and Webs
Food chains
Trophic levels feeding relationships start with energy
from the sun captured by producers
all levels connect to decomposers
Fungi
Level 4
Level 3
Level 2
Level 1
Decomposers
Producer
Primary consumer
Secondary consumer
Tertiary consumer
top carnivore
carnivore
herbivore
Bacteria
autotrophs
heterotrophs
Food webs
Food chains are linked together into food webs
Try to follow a food chain through the web
A better representation of a real food web….
North Atlantic Ocean food web
6 OctOpening: Algae beetle larva minnow bluegill pike
Where does all the energy in this food chain come from? What would happen if minnows were taken out of the food chain?
Agenda Ecology notes Efficiency Activity
Homework none
In the following food web, which organisms would most likely be a/an:
producer consumer herbivore carnivore omnivore
A
BC
D
EF
G
HI
Feeding levels
How much energy can you get from food? only the energy that
is stored in the organism
80%-90% energy lost from one level to next
food chain can only have 4 or 5 levels Why?
Inefficiency of energy transfer
Loss of energy between levels of food chain To where is the energy lost? The cost of living!
only this energymoves on to the next level in the food chain
15%growth
50%waste (feces)
35%cellularrespiration
energy lost todaily livingenergy lost todaily living
But what about nutrients?
Energy flows through but nutrients cycle nutrients must be recycled
to be available for the next generation
decomposers return nutrients to the soil after creatures die
fungi bacteria
nutrients
decomposers
Use mathematical representations to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.
C6H12O6 + O2 CO2 + H2O + Energy (ATP or Light)
Show that matter cycles in an ecosystem...
Show that energy flows through an ecosystem…
7 Oct
Opening Agenda
Participation Quiz Practice energy
Problem Biological Control Begin Population
Work
Homework None- Test on
Friday
Participation Quiz1. All the organisms of the
same species living in an area
2. An organism that can make it’s own food
3. An organism that eats only plant material
4. An organism that breaks down dead material to return nutrients to soil
5. An organism that can eat both animal and plant material
A. Decomposer
B. OmnivoreC. PopulationD. CommunityE. ProducerF. CarnivoreG. Herbivore
Practice Energy Problems If a mouse eats 200 calories of grain, how much
of that energy will be available to the cat that eats the mouse? E2=E1 (.15) E2 = 200 (.15) E2= 30 cal
How much of the original 200 cal. Will be available to the coyote that eats the cat? E3= E2 (.15) E3 = 30(.15) E3 = 4.5 cal
If a cat needs 1200 calories a day to survive, how many calories worth of grain would it take to sustain 1 cat? E2 = 1200 1200 = E1(.15) E1= 8000 cal
Strange Days on Planet Earth – Invaders Biological control – (Min 19- Lake Victoria)
8 Oct
Opening
Agenda Populations Limiting factors
Homework Unit 3 (mini)Exam
on Friday
What controls populations?
•Availability of resources
-food, water, territory
•Predation
•Disease
Human Population Growth
http://www.youtube.com/watch?v=VcSX4ytEfcE
8 Oct
Opening
Agenda Population Studies Review
Homework Test Tomorrow