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Consumer-resource interactions and the evolution of migration.

Devin M Drown1, Mark F Dybdahl, Richard Gomulkiewicz

  • 1School of Biological Sciences, Washington State University, PO Box 644236, Pullman, Washington, 99164; Department of Biology, Indiana University, 1001 E 3rd St, Bloomington, Indiana, 47405. dmdrown@indiana.edu.

Evolution; International Journal of Organic Evolution
|October 25, 2013
PubMed
Summary
This summary is machine-generated.

Consumer-resource interactions can drive the evolution of migration in species. Migration rates change based on local adaptation, with maladapted species increasing and adapted species decreasing migration.

Keywords:
Coevolutionconsumer-resource interactionslocal adaptationmigration

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Area of Science:

  • Evolutionary biology
  • Ecology
  • Theoretical ecology

Background:

  • Theoretical studies suggest selection favors migration with temporal and spatial fitness variation.
  • The role of consumer-resource interactions in driving migration evolution remains unclear.
  • Consumer-resource dynamics are common in nature and create fitness variability.

Purpose of the Study:

  • To investigate if and how migration evolves under consumer-resource coevolutionary dynamics.
  • To provide a general explanation for the widespread occurrence of migration.

Main Methods:

  • Development of a mathematical model.
  • Analysis of how fitness variability driven by consumer-resource interactions influences migration evolution.

Main Results:

  • Consumer-resource coevolution can drive the evolution of migration in either or both interacting species.
  • Short-term migration rate changes depend on local adaptation: increasing when maladapted, decreasing when adapted.
  • Long-term evolutionary trends in migration rates can diverge based on interspecific interaction strength.

Conclusions:

  • Consumer-resource interactions offer a general explanation for the evolution and pervasiveness of migration.
  • Local adaptation state dictates short-term migration rate adjustments.
  • Interspecific interaction strength influences long-term evolutionary divergence in migration rates.