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if a species occurs in a patch, that patch must qualify as a source in a metapopulation model

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Lelia Lubowitz
Lelia LubowitzLv2
25 Jan 2018
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Related questions

the greater the distance between a source patch and a sink patch, the more likely that the sink patch will be occupied

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false

7. Metapopulation models and source-sink models both assume that patches of suitable habitat are distributed throughout a matrix of unsuitable babitat. Which of the following best describes how they DIFFER? a. In a metapopulation model, all patches produce emigrants equally; in a source-sink model, patches vary in production of emigrants. b. In a metapopulation model, all patches can be occupied; in a source-sink model, some patches can never be colonized. c. In a metapopulation model, the matrix of unsuitable habitat is uniform; in a source-sink model, different parts of the matrix are less permeable to dispersers. d. All of the above are correct.

In a model by Wright (1940), the genetic differentiation among local populations was enhanced by metapopulation structure. In contrast, work by Slatkin (1987) suggested that metapopulation

structure can reduce genetic differentiation among populations. How can we reconcile thse two views? Explain how both can be true depending on the characteristics of the metapopulation?

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