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Unformatted text preview: Ecosystem Ecology (Chapter 55) Ecosystem: Sum of all the organisms living within its boundaries and all the abiotic factors with which they interact Ecosystem dynamics involve energy flow and chemical cycling Energy and nutrient dynamics (Learn Figure 55.4) Energy flows through ecosystems Nutrients cycle within ecosystems Energy is conserved but degraded to heat Trophic levels Primary producers: ultimately support all others within ecosystems (autotrophs, plants, algae, photosynthetic prokaryotes) Primary consumers: herbivores Secondary consumers: carnivores eating herbivores Tertiary consumers: carnivores eating carnivores Decomposers: consumers that get their energy from detritus (nonliving organic materials), detritivores (prokaryotes and fungi) Primary Production Amount of light energy converted into chemical energy by autotrophs Energy per unit area per unit time (J/m 2 *yr) or biomass added to the ecosystem per unit area per unit time (g/m 2 *yr) Sets upper limit on ecosystem complexity o GPP = Gross primary production o...
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This note was uploaded on 09/21/2011 for the course BSC2011C 2011 taught by Professor Fedorka/song during the Spring '11 term at University of Central Florida.
- Spring '11