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AP Bio - Ecosystems and Restoration Ecology

Ms. Boyea Energetics Unit
by

Michelle Munn

on 6 November 2014

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Transcript of AP Bio - Ecosystems and Restoration Ecology

Ecosystems and Restoration Ecology
Focus on the FLOW of energy!
What organism takes in energy?
Primary Producers
Primary Consumers
Secondary Consumers
Tertiary Consumers
Decomposers/Detritivores
What organism eats the primary producer?
Limiting Factors in Ecosystems
Primary Production:

The amount of light energy converted to chemical energy in the form of organic compounds--by autotrophs during a given period of time in an ecosystem
Measuring the Limiting Factors
Gross Primary Production (GPP):
the amount of energy from light converted to chemical energy
Net Primary Production (NPP):
the GPP minus the energy used by the primary producers to do cell respiration (Ra) NPP = GPP - Ra
Net Ecosystem Production (NEP):
Amount of new biomass added. NEP = GPP - Rt (Rt is total ecosystem respiration)
Why is production low in the Sahara?






How is there productivity in the ocean?
Limiting Nutrients: the element that MUST be added for production to increase.
examples: light, nitrogen, phosphorus, water, oxygen
When you eat producers (or consumers) what percent of of the Sunlight energy do you take in?
Energy transfer is typically 10% between trophic levels
Net Secondary production: energy stored as biomass
Assimilation of primary production: energy taken in and not lost in feces
Production Efficiency = Net secondary production / Assimilation of primary production
Trophic Efficiency:
the % of production that is transferred to the next trophic level.
So how did this happen?
Biogeochemical cycles:

4 Cycles: water, carbon, nitrogen and phosphorus
you need to know these things about the 4 cycles:
1. biological importance
2. biologically available forms
3. reservoirs
4. key processes
Restoration Ecology: what it is, and an few examples

Exit Ticket, you NEED to summarize the cycles:
Use a textbook!
Full transcript