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Bio 201 F09 Lowry lect 38 (L38) biodiversity

Bio 201 F09 Lowry lect 38 (L38) biodiversity - Ecosystems...

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1 Ecosystems and Biodiversity Patterns in Species Changes During Succession Eugene Odum (1969) 3) ABILITY TO MAINTAIN The Stability of the “Climax” Community Higher Species diversity Evolution of species long associated with one another - reduce direct competition – Leads to greater resource partitioning More species may contribute to greater stability of community structure Ecosystems Ecology - Studying the processes that maintain an ecosystem, which is a functioning biological area, often including multiple communities Ecosystem = a contained space or area of the Earth, including all of the organisms along with all the components of the abiotic environment Involves inputs and outputs of energy and material
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2 Where is an Ecosystem ? Ecosystem processes: nutrients Biogeochemical cycles : path of nutrients through an ecosystem Nutrients accumulate in ind. or pop. = "pools" of nutrients Nutrients cycle between pools – Meteorological – Geological Biological transport Ray Lindeman 1942 First Ecosystem model
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3 Eugene Odum 1953.
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