Species traits and phylogenetic conservatism of climate-induced range shifts in stream fishes

Lise Comte (), Jérôme Murienne and Gaël Grenouillet
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Lise Comte: Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique)
Jérôme Murienne: Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique)
Gaël Grenouillet: Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique)

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Understanding climate-induced range shifts is crucial for biodiversity conservation. However, no general consensus has so far emerged about the mechanisms involved and the role of phylogeny in shaping species responses has been poorly explored. Here, we investigate whether species traits and their underlying phylogenetic constraints explain altitudinal shifts at the trailing and leading edges of stream fish species ranges. We demonstrate that these shifts are related to dissimilar mechanisms: whereas range retractions show some support for phylogenetic clustering due to a high level of conservatism in thermal safety margins, range expansions are underpinned by both evolutionarily conserved and labile traits, notably trophic position and life-history strategy, hence decreasing the strength of phylogenetic signal. Therefore, while climate change brings many difficulties in establishing a general understanding of species vulnerability, these findings emphasize how combining trait-based approaches in light of the species evolutionary history may offer new opportunities in facing conservation challenges.

Date: 2014
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DOI: 10.1038/ncomms6053

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