journal article Jul 14, 2015

How mechanisms of habitat preference evolve and promote divergence with gene flow

View at Publisher Save 10.1111/jeb.12683
Abstract
AbstractHabitat preference may promote adaptive divergence and speciation, yet the conditions under which this is likely are insufficiently explored. We use individual‐based simulations to study the evolution and consequence of habitat preference during divergence with gene flow, considering four different underlying genetically based behavioural mechanisms: natal habitat imprinting, phenotype‐dependent, competition‐dependent and direct genetic habitat preference. We find that the evolution of habitat preference generally requires initially high dispersal, is facilitated by asymmetry in population sizes between habitats, and is hindered by an increasing number of underlying genetic loci. Moreover, the probability of habitat preference to emerge and promote divergence differs greatly among the underlying mechanisms. Natal habitat imprinting evolves most easily and can allow full divergence in parameter ranges where no divergence is possible in the absence of habitat preference. The reason is that imprinting represents a one‐allele mechanism of assortative mating linking dispersal behaviour very effectively to local selection. At the other extreme, direct genetic habitat preference, a two‐allele mechanism, evolves under restricted conditions only, and even then facilitates divergence weakly. Overall, our results indicate that habitat preference can be a strong reproductive barrier promoting divergence with gene flow, but that this is highly contingent on the underlying preference mechanism.
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Details
Published
Jul 14, 2015
Vol/Issue
28(9)
Pages
1641-1655
License
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Funding
National Institutes of Health Award: GM56693
National Science Foundation
NSF Award Award: EF-0830858
Swiss National Science Foundation Award: PZ00P3_126391/1
Post-doctoral Fellowship from the National Institute for Mathematical and Biological Synthesis
US Department of Homeland Security and the US Department of Agriculture
The University of Tennessee, Knoxville
Cite This Article
D. Berner, X. Thibert‐Plante (2015). How mechanisms of habitat preference evolve and promote divergence with gene flow. Journal of Evolutionary Biology, 28(9), 1641-1655. https://doi.org/10.1111/jeb.12683