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Unformatted text preview: 493- Toolkit9-9-08Dont need to know equations for N fixationEcosystem function and Nutrient Cycling-defining ecosystems-productivity is key- cycling of energy -cycling of nutrients-carbon (c), Nitrogen (N), and Phosphorus (P)Cycling of energy on earth(get illustration)Transfers of energy on earth: food chains-transfer (in) efficiency ultimately limits diversity.Ecosystem- where ecology takes place-relationship between organisms in a given area and their interactions with the physical environment-biotic (living)and abiotic(elements)Basic flows of energy and matter through the ecosystem(get illustration)-primary producers- -Net ecosystem productivity- varies from ecosystem to ecosystem. -gross primary productivity- what plants use, and what they use for themselves, plants need to use part of something, what they dont use is available to be consumed. (GPP- plant respiration)=NPP- heterotrophic respiration (what everyone eats)= Net Ecosystem Productivity....
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- Spring '08