Northeast Atlantic elasmobranch community on the move: Functional reorganization in response to climate change

Type Article
Date 2024-01
Language English
Author(s) Coulon NoémieORCID1, Elliott SophieORCID2, Teichert NilsORCID1, Auber ArnaudORCID3, McLean MatthewORCID4, Barreau Thomas5, Feunteun EricORCID1, Carpentier AlexandreORCID6
Affiliation(s) 1 : Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) MNHN, CNRS, IRD, SU, UCN, UA, Dinard, France
2 : Salmon & Trout Research Centre Game & Wildlife Conservation Trust Wareham, UK
3 : Unité Halieutique Manche Mer du Nord, Laboratoire Ressources Halieutiques IFREMER, Boulogne‐sur‐Mer, France
4 : Department of Biology and Marine Biology, Center for Marine Science University of North Carolina Wilmington, Wilmington, North Carolina, USA
5 : Service des Stations Marine, Station Marine de Dinard, Dinard, France
6 : Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) MNHN, CNRS, IRD, SU, UCN, UA, Campus de Beaulieu, Université de Rennes, Rennes ,France
Source Global Change Biology (1354-1013) (Wiley), 2024-01 , Vol. 30 , N. 1 , P. e17157 (15p.)
DOI 10.1111/gcb.17157
Keyword(s) climate change, community, elasmobranch, joint species distribution modeling, range shift, species traits
Abstract

While spatial distribution shifts have been documented in many marine fishes under global change, the responses of elasmobranchs have rarely been studied, which may have led to an underestimation of their potential additional threats. Given their irreplaceable role in ecosystems and their high extinction risk, we used a 24‐year time series (1997–2020) of scientific bottom trawl surveys to examine the effects of climate change on the spatial distribution of nine elasmobranch species within Northeast Atlantic waters. Using a hierarchical modeling of species communities, belonging to the joint species distribution models, we found that suitable habitats for four species increased on average by a factor of 1.6 and, for six species, shifted north‐eastwards and/or to deeper waters over the past two decades. By integrating species traits, we showed changes in habitat suitability led to changes in the elasmobranchs trait composition. Moreover, communities shifted to deeper waters and their mean trophic level decreased. We also note an increase in the mean community size at maturity concurrent with a decrease in fecundity. Because skates and sharks are functionally unique and dangerously vulnerable to both climate change and fishing, we advocate for urgent considerations of species traits in management measures. Their use would make it better to identify species whose loss could have irreversible impacts in face of the myriad of anthropogenic threats.

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Publisher's official version 15 9 MB Open access
Appendix S1 37 KB Open access
Appendix S2 2 MB Open access
Appendix S3 22 2 MB Open access
Appendix S4 15 MB Open access
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How to cite 

Coulon Noémie, Elliott Sophie, Teichert Nils, Auber Arnaud, McLean Matthew, Barreau Thomas, Feunteun Eric, Carpentier Alexandre (2024). Northeast Atlantic elasmobranch community on the move: Functional reorganization in response to climate change. Global Change Biology, 30(1), e17157 (15p.). Publisher's official version : https://doi.org/10.1111/gcb.17157 , Open Access version : https://archimer.ifremer.fr/doc/00875/98665/