How range shifts induced by climate change affect neutral evolution

G.J McInerny, J.R.G Turner, H.Y Wong, J.M.J Travis, T.G Benton

Abstract

We investigate neutral evolution during range shifts in a strategic model of a metapopulation occupying a climate gradient. Using heritable, neutral markers, we track the spatio-temporal fate of lineages. Owing to iterated founder effects (‘mutation surfing’), survival of lineages derived from the leading range limit is enhanced. At trailing limits, where habitat suitability decreases, survival is reduced (mutations ‘wipe out’). These processes alter (i) the spatial spread of mutations, (ii) origins of persisting mutations and (iii) the generation of diversity. We show that large changes in neutral evolution can be a direct consequence of range shifting.

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Footnotes

  • One contribution of 17 to a Special Issue ‘Geographic range limits of species’.

    • Received October 29, 2008.
    • Accepted December 2, 2008.
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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