Evolution of dispersal and life history interact to drive accelerating spread of an invasive species

Perkins, T. Alex, Phillips, Benjamin L., Baskett, Marissa L., and Hastings, Alan (2013) Evolution of dispersal and life history interact to drive accelerating spread of an invasive species. Ecology Letters, 16 (8). pp. 1079-1087.

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View at Publisher Website: http://dx.doi.org/10.1111/ele.12136
 
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Abstract

Populations on the edge of an expanding range are subject to unique evolutionary pressures acting on their life-history and dispersal traits. Empirical evidence and theory suggest that traits there can evolve rapidly enough to interact with ecological dynamics, potentially giving rise to accelerating spread. Nevertheless, which of several evolutionary mechanisms drive this interaction between evolution and spread remains an open question. We propose an integrated theoretical framework for partitioning the contributions of different evolutionary mechanisms to accelerating spread, and we apply this model to invasive cane toads in northern Australia. In doing so, we identify a previously unrecognised evolutionary process that involves an interaction between life-history and dispersal evolution during range shift. In roughly equal parts, life-history evolution, dispersal evolution and their interaction led to a doubling of distance spread by cane toads in our model, highlighting the potential importance of multiple evolutionary processes in the dynamics of range expansion.

Item ID: 29063
Item Type: Article (Research - C1)
ISSN: 1461-0248
Keywords: climate shift, integral projection model, integrodifference equation, invasion front, invasion lag phase, natural selection, quantitative genetics, Rhinella marina, spatial selection, spatial spread
Funders: US Department of Energy, Australian Research Council (ARC)
Projects and Grants: Krell Institute Computational Sciences Graduate Fellowship, contract no. DE-FG02-97ER25308
Date Deposited: 28 Aug 2013 05:32
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060207 Population Ecology @ 100%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960405 Control of Pests, Diseases and Exotic Species at Regional or Larger Scales @ 100%
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