Download - Ecosystems
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Ecosystems
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Ecosystems
Primary producers
Sun
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Ecosystems
Primary consumers
Secondary consumers
Primary producers
Sun
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Ecosystems
Primary consumers
Secondary consumers
Primary producers
Sun
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Ecosystems
Detritus Primary consumers
Secondary consumers
Primary producers
Sun
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Ecosystems
Detritus Primary consumers
Secondary consumers
Primary producers
Sun
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Ecosystems
Microbes and other
detritivores
Detritus Primary consumers
Secondary consumers
Primary producers
Sun
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Detritus
Ecosystems
Primary producers
Primary consumers
Secondary consumers
Microbes and other
detritivores
Sun
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Detritus
Ecosystems
Primary producers
Primary consumers
Secondary consumers
Microbes and other
detritivores
Sun
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Primary production is the amount of light energy converted to chemical energy (organic compounds) during a given time period
Ecosystems
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Primary production is the amount of light energy converted to chemical energy (organic compounds) during a given time period.
Ecosystems
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Gross primary production (GPP) is the amount of light energy converted to chemical energy by photosynthesis per unit time.
Ecosystems
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Net primary production (NPP) is equal to GPP minus the energy used by the primary producers for respiration (R)
NPP = GPP – R
Ecosystems
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Net primary production (NPP) is equal to GPP minus the energy used by the primary producers for respiration (R)
NPP = GPP – R
Ecosystems
IMPORTANT
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GPP can be measured in: •Energy J/m2/yr•Biomass g/m2/yr
Ecosystems
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GPP can be measured in: •Energy J/m2/yr•Biomass g/m2/yr
Biomass is dry weight and includes only new mass.
Ecosystems
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Limitations on primary production:•Light•Nutrients (N, P, Fe)
Ecosystems
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Limitations on primary production:•Light•Nutrients (N, P, Fe)
Iron is important for cyanobacteria, and cyanobacteria fix nitrogen in the oceans
Ecosystems
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Limitations on primary production:•Light•Nutrients (N, P, Fe)
Iron is important for cyanobacteria, and cyanobacteria fix nitrogen in the oceans.
Eutrophication is overgrowth of algae in lakes and ponds.
Ecosystems
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Evapotranspiration is a measure of temperature and moisture
Ecosystems
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Evapotranspiration is a measure of temperature and moisture.
Ecosystems
NP
P (
g/m
2 /yr
)
Evapotranspiration (mm)
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Production efficiency is a measure of energy transfer between trophic levels
Ecosystems
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Production efficiency is a measure of energy transfer between trophic levels net secondary production assimilation of primary production
Ecosystems
efficiency = -------------------------------
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Production efficiency is a measure of energy transfer between trophic levels
calories eaten calories stored
Ecosystems
efficiency = -------------------------------
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Production efficiency is a measure of energy transfer between trophic levels
calories eaten calories stored
Usually less than 20%
Ecosystems
efficiency = -------------------------------
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Production efficiency is a measure of energy transfer between trophic levels
Ecosystems
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Production efficiency is a measure of energy transfer between trophic levels
Ecosystems
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Production efficiency is a measure of energy transfer between trophic levels.
Ecosystems
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Pesticides get magnified as they travel up through trophic levels.
Ecosystems
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Pesticides get magnified as they travel up through trophic levels.
Ecosystems
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Pesticides get magnified as they travel up through trophic levels.
Ecosystems
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Pesticides get magnified as they travel up through trophic levels.
Ecosystems
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Pesticides get magnified as they travel up through trophic levels.
Ecosystems
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Biogeochemical cycles
Ecosystems
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Detritus
Ecosystems
Primary producers
Primary consumers
Secondary consumers
Microbes and other
detritivores
Sun
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Detritus
Ecosystems
Primary producers
Primary consumers
Secondary consumers
Microbes and other
detritivores
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Detritus
Ecosystems
Primary producers
Primary consumers
Secondary consumers
Microbes and other
detritivores
Abiotic reservoir
Geologic processes
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Important cycles:•Water•Carbon•Nitrogen •Phosphorus.
Ecosystems
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Math Review
rB > C
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Math Review
rB > C
ΔN K - N------- = rN (-----------)Δt K
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Math Review
rB > C
net secondary production assimilation of primary productionefficiency = --------------------------------------
ΔN K - N------- = rN (-----------)Δt K