title: Species traits and phylogenetic conservatism of climate-induced range shifts in stream fishes.
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.
authors.affiliation: 1] Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique), 118 route de Narbonne, F-31062 Toulouse, France [2] CNRS, Université Paul Sabatier, UMR5174 EDB, F-31062 Toulouse, France.
authors.forename: Lise
authors.initials: L
authors.lastname: Comte
authors.affiliation: 1] Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique), 118 route de Narbonne, F-31062 Toulouse, France [2] CNRS, Université Paul Sabatier, UMR5174 EDB, F-31062 Toulouse, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Murienne
authors.affiliation: 1] Université Toulouse 3 Paul Sabatier, CNRS, ENFA; UMR5174 EDB (Laboratoire Évolution and Diversité Biologique), 118 route de Narbonne, F-31062 Toulouse, France [2] CNRS, Université Paul Sabatier, UMR5174 EDB, F-31062 Toulouse, France.
authors.forename: Gaël
authors.initials: G
authors.lastname: Grenouillet
mesh_terms: D000220:Adaptation, Biological / Q000502:physiology*; D000531:Altitude; D063147:Animal Distribution; D000818:Animals; D057231:Climate Change; D003247:Conservation of Natural Resources / Q000379:methods; D005399:Fishes / Q000235:genetics*; D005602:France; D010802:Phylogeny; D045483:Rivers; D013045:Species Specificity