11-28-11 Species & Speciation I

11-28-11 Species & Speciation I - ZOL445 Evolution...

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ZOL445 Evolution November 28, 2011 What is a species? Species concepts: Morphological/Phenetic Species concept Biological species concept (BSC) Ecological species concept (ESC) Phylogenetic species concept (PSC) Morphological/Phenetic species concept: Morphological species : Group of organisms that share a set of phenotypic characteristics or possess common essence Είδος: Species and essence Biological Species Concept: Organisms may look alike and be different species or look different and be the same species. Biological species : Species are groups of interbreeding natural populations that are reproductively isolated from other such groups. o Definition employed by the Endangered Species Act o Biological species are phenotypically similar because they share genes through interbreeding o What’s the barrier that prevents interbreeding between species? o
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This note was uploaded on 12/21/2011 for the course ANP 203 taught by Professor Lewis during the Fall '11 term at UCSB.

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11-28-11 Species & Speciation I - ZOL445 Evolution...

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