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B Population-Structure Models
Pages 157-158

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From page 157...
... Such isolation occurs because the geographic area is much greater than an individual's migration distance. This model reflects the loss of heterogeneity that results when individuals breed with their neigh­ bors and produce genetic differentiation across the range.
From page 158...
... Modern theory does not necessarily assume that local populations will go extinct and allows that there can be substantial migration between them. However, the ramifications of habitat fragmen ­ tation on formation of metapopulations has not been fully developed (Jones, 2006)

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