30. Species Extinctions and Effects on Ecosystems

30. Species Extinctions and Effects on Ecosystems -...

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Defining Units for Conservation Determining which groups of individuals are “unique enough” to merit special attention
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Hierarchal Organization of Genetic Diversity
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Defining Conservation Units (below the species level) Preserving the evolutionary potential of a species requires conserving genetic differences among populations Conservation resources are always limited and sometimes only a subset of populations can be protected A major application of conservation genetics involves characterizing genetic differences among populations and identifying “units for conservation”.
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A Simple Example for Defining Conservation Units B C D A E Consider 5 populations, A to E , where populations with different colors are genetically different If you had only enough resources to protect 3 populations would you chose?
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Current OG Historic OG US federally threatened Not listed Canadian Species at Risk
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Identifying Conservation Units for Marbled Murrelets WA OR
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Implications for Management Department of Interior used genetic results (and morphological and ecological evidence) to determine that murrelets did not constitute a distinct population segment Set the table for delisting Marbled Murrelets and opening old-growth forests in the Pacific Northwest up for timber harvesting Has not happened yet, but the process got very political.
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Identification of Species for Conservation Genetic information has been critical for identifying “new” or “cryptic” species that are morphologically similar to a second species Genetic data is also used for identifying species in forensic applications determine which species might have been impacted by illegal poaching, harvesting, etc…
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Species African Bush Elephant African Forest Elephant
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This note was uploaded on 12/17/2011 for the course ZOO 360 taught by Professor Staff during the Fall '08 term at University of Wisconsin Colleges Online.

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30. Species Extinctions and Effects on Ecosystems -...

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