Species Richness A graphical stroll.

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Presentation transcript:

Species Richness A graphical stroll

Richness Metrics Richness EPT richness Ephemeroptera richness Plecoptera richness Trichoptera richness ??? richness Assumed to decrease with increasing impairment

Speciation Immigration Extinction Three Basic Processes Speciation Immigration Extinction

How Many Different Concepts? Succession Disturbance Island biogeography Patch dynamics Hierarchy Competition – predation A Unified Theory

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

Rosenzweig 1996

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