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Coevolutionary clines across selection mosaics.

S L Nuismer1, J N Thompson, R Gomulkiewicz

  • 1School of Biological Sciences, Washington State University, Pullman 99164, USA. nuismer@wsu.edu

Evolution; International Journal of Organic Evolution
|September 27, 2000
PubMed
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Geographic variation in selection and gene flow shape coevolutionary dynamics. Different interaction types, like antagonism and mutualism, create distinct spatial patterns of adaptation and maladaptation across species ranges.

Area of Science:

  • Evolutionary Biology
  • Population Genetics
  • Ecological Genetics

Background:

  • Coevolutionary dynamics are influenced by geographic variation in selection and gene flow.
  • Understanding how these factors interact is crucial for predicting species adaptation patterns.

Purpose of the Study:

  • To model geographically structured coevolution considering gene flow and spatially varying selection.
  • To investigate how different coevolutionary interaction types (antagonism, mutualism) affect spatial genetic patterns.

Main Methods:

  • Developed a genetic model of geographically structured coevolution.
  • Simulated interactions with varying selection regimes (uniform, heterogeneous) and gene flow.

Main Results:

Related Experiment Videos

  • Geographically structured coevolution generates allele-frequency clines in interacting species.
  • Antagonistic interactions produce dynamic clines with shifting adaptation, while mutualisms yield stable, fixed patterns.
  • Mixed interactions result in both dynamic and equilibrium clines, potentially allowing mutualism persistence.

Conclusions:

  • The interplay of gene flow and selection mosaics shapes coevolutionary outcomes and spatial adaptation.
  • Interaction type critically determines the stability and dynamics of spatial genetic patterns.
  • The scale of coevolutionary studies must consider the relative influence of gene flow, selection, and habitat size.