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AP Bio - Ecosystems and Restoration Ecology
Transcript of AP Bio - Ecosystems and Restoration Ecology
Focus on the FLOW of energy!
What organism takes in energy?
What organism eats the primary producer?
Limiting Factors in Ecosystems
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
the % of production that is transferred to the next trophic level.
So how did this happen?
4 Cycles: water, carbon, nitrogen and phosphorus
you need to know these things about the 4 cycles:
1. biological importance
2. biologically available forms
4. key processes
Restoration Ecology: what it is, and an few examples
Exit Ticket, you NEED to summarize the cycles:
Use a textbook!