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: | Kisdi E. |
Keywords: | risk |
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.