10_ outline Community Ecology and Succession

10_ outline Community Ecology and Succession - Community...

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Community Ecology and Succession What is a community? An association of interacting populations Group of species found in a particular area or habitat Communities described in two ways 1) Species Richness – How many species are in the community? Who Cares? Basic questions about natural patterns What factors determine species richness? Why does species richness decrease towards the poles? 2) Species Dominance (or “evenness”)- The relative abundance of species in a community 3-Food webs show where different organisms “fit in” - Help us see interdependence among - seemingly different organisms. - No species stands alone! Community Ecology--Who Cares? Human health and welfare Disease outbreaks happen at community level Species diversity can affect the outcome! Lyme disease: why such a problem in the suburbs?
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Factors regulating community structure Abiotic Factors Environmental gradients (e.g. H20, nutrients, light, temperature) Catastrophic Disturbance
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10_ outline Community Ecology and Succession - Community...

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