Lecture 8_SAC_Energy&NPP

Lecture 8_SAC_Energy&NPP - Ecosystems Ecosystems...

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Unformatted text preview: Ecosystems Ecosystems Ecology Ecology 1. What is Ecosystems Ecology? 1. Energy transfer between trophic levels: Why should we all become vegetarians? 1. Carbon cycle part 1: How does energy enter terrestrial (and some aquatic) ecosystems? Alvarez_Lecture You are here Important concepts : Pool Flux Inputs Outputs Ecological efficiency Assimilation efficiency Ingested and egested energy Assimilated, excreted, and respired energy Energy budget Gross Primary Production (GPP) Net Primary Productivity (NPP) 1. What is Ecosystems Ecology? 1. What is Ecosystems Ecology? Ecosystem: Ecosystem: Ecological system consisting of all the organisms in an area and the physical environment with which they interact Ecology: Ecology: Study of the interactions of organisms with one another and with their environment Ecosystem Ecology: Ecosystem Ecology: Study of natural systems from the standpoint of the flow of energy and cycling of matter Input s output s p o o l p o o l flux Ecosyste m cycle Silver Springs Studies H.T. Odum H.T. Odum Model adapted from the Silver Springs model.(Source: Odum, H.T. (1971). Environment, Power, and Society . Wiley-Interscience New York, N.Y.) H are herbivores, C are carnivores, TC are top carnivores, and D are decomposers. Squares represent biotic pools and ovals are fluxes or energy or nutrients from The Silver Spring Model Questions in Ecosystem Questions in Ecosystem Ecology: Ecology: Where does the CO 2 produced by burning of fossil fuels go? Is it stored in vegetation? Which? How? How long? What is the effect of fire on ecosystem growth and reproduction? Are nutrients lost? Where do they go? How does species diversity influence this? Where does the extra fertilizer that does not result in biomass increase go? Why? http://narn.physics.auburn.edu/images/plasmas/Sun_Earth.jpg 2. Energy transfer between trophic 2. Energy transfer between trophic levels: levels: Why should we all become Why should we all become vegetarian?...
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This note was uploaded on 07/13/2011 for the course PCB 4034C taught by Professor Osenberg during the Spring '11 term at University of Florida.

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Lecture 8_SAC_Energy&NPP - Ecosystems Ecosystems...

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