Genetic and demographic trends from rear to leading edge are explained by climate and forest cover in a cold-adapted ectotherm

Type Article
Date 2021-02
Language English
Author(s) Dupoue AndreazORCID1, 2, Trochet Audrey1, Richard Murielle1, Sorlin Mahaut1, Guillon Michael3, 4, Teulieres-Quillet Jules1, Valle ClementORCID1, Rault Cyrielle1, Berroneau Maud3, Berroneau Matthieu3, Lourdais OlivierORCID4, Blaimont Pauline5, 6, Bertrand Romain1, Pottier Gilles7, Calvez Olivier1, Guillaume Olivier1, Le Chevalier Hugo1, Souchet Jeremie1, Le Galliard Jean-FrancoisORCID3, 8, Clobert Jean1, Aubret Fabien1, 9
Affiliation(s) 1 : CNRS UMR 5321, Stn Ecol Theor & Expt Moulis, St Girons, France.
2 : Sorbonne Univ, CNRS, IEES Paris, UMR 7618, Paris, France.
3 : Cistude Nat, Chemin Moulinat, Le Haillan, France.
4 : Ctr Etud Biol Chize ULR CNRS UMR 7372, Beauvoir Sur Niort, France.
5 : Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95064 USA.
6 : Rider Univ, Dept Biol, Lawrenceville, NJ 08648 USA.
7 : Nat Occitanie, Maison Environm Midi Pyrenees, Toulouse, France.
8 : Ecole Normale Super, CNRS UMS 3194, Ctr Rech Ecol Expt & Predict CEREEP Ecotron IleDe, St Pierre Les Nemours, France.
9 : Curtin Univ, Sch Mol & Life Sci, Behav Ecol Lab, Bentley, WA, Australia.
Source Diversity And Distributions (1366-9516) (Wiley), 2021-02 , Vol. 27 , N. 2 , P. 267-281
DOI 10.1111/ddi.13202
WOS© Times Cited 4
Keyword(s) abundance, climate, colonization, ectotherm, forest cover, gene flow, inbreeding, population decline, structuration
Abstract

Aim Determining whether altitudinal shifts in species distributions leave molecular footprints on wild populations along their range margins from rear to leading edge. Location South-west France. Methods We compared the demographic and genetic variation in 42 wild populations of the Western oviparous subclade B2 of a cold-adapted lizard (Zootoca vivipara louislantzi). These populations can be divided into four ecological units across altitudinal clines in South-west France (rear edge: <100 m, admixture zone: 100-500 m, continuous range: 500-1,300 m and leading edge: >1,300 m above sea level). Results Within the rear edge were found the highest levels of inbreeding, genetic differentiation and evidence of interrupted gene flow compared to central or colonizing areas. Within the leading edge, altitudinal range expansion occurred over the last centuries and populations showed relatively low genetic diversity. These demographic and genetic trends were better explained by inhospitable (warm and dry) climate conditions and forest cover. Main conclusions This empirical evidence illustrates that molecular footprints of climate conditions and habitat quality on wild population trends can be perceived after recent events, which should be of particular importance to accurately understand and anticipate human-induced global change on wild species and ecosystems.

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Dupoue Andreaz, Trochet Audrey, Richard Murielle, Sorlin Mahaut, Guillon Michael, Teulieres-Quillet Jules, Valle Clement, Rault Cyrielle, Berroneau Maud, Berroneau Matthieu, Lourdais Olivier, Blaimont Pauline, Bertrand Romain, Pottier Gilles, Calvez Olivier, Guillaume Olivier, Le Chevalier Hugo, Souchet Jeremie, Le Galliard Jean-Francois, Clobert Jean, Aubret Fabien (2021). Genetic and demographic trends from rear to leading edge are explained by climate and forest cover in a cold-adapted ectotherm. Diversity And Distributions, 27(2), 267-281. Publisher's official version : https://doi.org/10.1111/ddi.13202 , Open Access version : https://archimer.ifremer.fr/doc/00731/84298/