11 - enough to • Sinks – subpopulations(or habitat...

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9/16/10 1 Lecture 11: Population growth, Landscape Ecology 1. Finish population growth concepts 2. Definition of landscape 3. Two concepts: Metapopulations Sources and sinks Definitions Landscape ecology – ecological studies across large spatial areas. Landscape – complex mosaic of ______ ____________ surrounding an area of interest. Populations exist in heterogeneous landscapes. • Uniform habitats are the exception rather than the rule: – most populations are divided into _________________ living in suitable habitat patches Metapopulation • Definition: a set of patches (each with _________________ ) linked by dispersal of individuals • Not every patch may be occupied every year. Therefore, “__________________” may still be important to protect Movement among habitat patches Snail kite Sources and sinks Sources – subpopulations (or habitat patches) where local production is
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Unformatted text preview: enough to ______________________ _____________________________ • Sinks – subpopulations (or habitat patches) where local production is ____ ______________________________ 9/16/10 2 Causes of Isolation • Whether or not areas of ______ __________________________ are substantial barriers to mobility depends on: – distance between subpopulations – nature of intervening habitat – mobility of the species Population models Unsuitable habitat High reproductive success in good patch forces migration to worse patch Consequences for conservation. .. What if the habitat you choose to preserve to “save” a species from extinction is a sink patch? Take home messages • Not all populations are equal in conservation value • Greatest need is to protect ________ (i.e., best quality habitat patches; may or may not be related to size)...
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This note was uploaded on 04/06/2011 for the course FNR 103 taught by Professor Staff during the Fall '08 term at Purdue.

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11 - enough to • Sinks – subpopulations(or habitat...

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