Invasive species as drivers of evolutionary change

cane toads in tropical Australia

Richard Shine*

*Corresponding author for this work

Research output: Contribution to journalArticle

60 Citations (Scopus)
1 Downloads (Pure)

Abstract

The arrival of an invasive species can have wide-ranging ecological impacts on native taxa, inducing rapid evolutionary responses in ways that either reduce the invader's impact or exploit the novel opportunity that it provides. The invasion process itself can cause substantial evolutionary shifts in traits that influence the invader's dispersal rate (via both adaptive and non-adaptive mechanisms) and its ability to establish new populations. I briefly review the nature of evolutionary changes likely to be set in train by a biological invasion, with special emphasis on recent results from my own research group on the invasion of cane toads (Rhinella marina) through tropical Australia. The toads' invasion has caused evolutionary changes both in the toads and in native taxa. Many of those changes are adaptive, but others may result from non-adaptive evolutionary processes: for example, the evolved acceleration in toad dispersal rates may be due to spatial sorting of dispersal-enhancing genes, rather than fitness advantages to faster-dispersing individuals. Managers need to incorporate evolutionary dynamics into their conservation planning, because biological invasions can affect both the rates and the trajectories of evolutionary change.

Original languageEnglish
Pages (from-to)107-116
Number of pages10
JournalEvolutionary Applications
Volume5
Issue number2
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

Bibliographical note

Shine, R. (2012). Invasive species as drivers of evolutionary change: cane toads in tropical Australia. Evolutionary Applications, 5(2), 107-116.Copyright 2011 Blackwell Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • adaptation
  • alien species
  • ecological impact
  • spatial sorting

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