Dispersal: Risk spreading versus local adaptation

Dispersal: Risk spreading versus local adaptation

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Article ID: iaor20032852
Country: United States
Volume: 159
Issue: 6
Start Page Number: 579
End Page Number: 596
Publication Date: Jun 2002
Journal: American Naturalist
Authors:
Keywords: risk
Abstract:

I investigate how risk spreading in stochastic environments and adaptation to permanent properties of local habitats interplay in the simultaneous evolution of dispersal and habitat specialization. In a simple two-patch model, I find many types of locally evolutionarily stable attractors of dispersal and of a trait involved in habitat specialization, including a single habitat specialist and a coalition of two specialists with low dispersal, a generalist with high dispersal, and several types of dispersal polymorphisms. In general, only one attractor is a global evolutionarily stable strategy (ESS). In addition to the ESS analysis, I also repesent some examples of the dynamics of evolution that exhibit adaptive diversification by evolutionary branching.

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