Northeast Atlantic elasmobranch community on the move: Functional reorganization in response to climate change
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Date | 2024-01 | ||||||||||||||||||||||||
Language | English | ||||||||||||||||||||||||
Author(s) | Coulon Noémie1, Elliott Sophie2, Teichert Nils1, Auber Arnaud3, McLean Matthew4, Barreau Thomas5, Feunteun Eric1, Carpentier Alexandre6 | ||||||||||||||||||||||||
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 |
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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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