ecosystems
DESCRIPTION
Ecosystems. Ecosystems. Primary producers. Sun. Ecosystems. Primary producers. Secondary consumers. Primary consumers. Sun. Ecosystems. Primary producers. Secondary consumers. Primary consumers. Sun. Ecosystems. Primary producers. Secondary consumers. Detritus. Primary consumers. - PowerPoint PPT PresentationTRANSCRIPT
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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