Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes

Ten species of cetaceans coexist in the Mediterranean Sea, one of the richest seas in biodiversity and endemisms worldwide. The conservation status of Mediterranean cetaceans has been a concern for many years, particularly due to increasing anthropogenic threats such as global warming and overfishin...

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Detalhes bibliográficos
Autores: Borrell Thió, Assumpció, Gazo i Pérez, Manel, Aguilar, Àlex, Raga, Juan A., Degollada, Eduard, Gozalbes, Patricia, García-Vernet, Raquel
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/184358
Acesso em linha:https://hdl.handle.net/2445/184358
Access Level:acceso abierto
Palavra-chave:Mediterrània (Mar)
Cetacis
Espanya
Mediterranean Sea
Cetacea
Spain
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spelling Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopesBorrell Thió, AssumpcióGazo i Pérez, ManelAguilar, ÀlexRaga, Juan A.Degollada, EduardGozalbes, PatriciaGarcía-Vernet, RaquelMediterrània (Mar)CetacisEspanyaMediterranean SeaCetaceaSpainTen species of cetaceans coexist in the Mediterranean Sea, one of the richest seas in biodiversity and endemisms worldwide. The conservation status of Mediterranean cetaceans has been a concern for many years, particularly due to increasing anthropogenic threats such as global warming and overfishing. We established the stable isotopic niches of carbon, nitrogen, and sulphur for five species of cetaceans inhabiting the northwestern Mediterranean Sea to elucidate the mechanisms of coexistence. The fin whale exploited epipelagic habitats with a low trophic level; the bottlenose dolphin was mostly neritic and had a high trophic level; the Risso's dolphin was oceanic and fed bathypelagically and at a high trophic level; finally, the common and striped dolphins displayed epipelagic distributions and similarly intermediate trophic levels. The isotopic niches of all species were exclusive except the common and striped dolphins, whose niches overlapped by 25%. These results suggest that the majority of species avoid competitive exclusion by trophic or spatial segregation with the exception of striped and common dolphins, in which interspecific competition is apparent. It is suggested that this competition brought the striped dolphin to displace the common dolphin from part of its distribution range, restricting it to the southern fringe of the western Mediterranean and, particularly, to the Alboran Sea. In this area, coexistence of the two species would be permitted by some degree of spatial segregation between them and a remarkably high productivity, all which mitigate competition.Elsevier2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/184358Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1016/j.pocean.2021.102559Progress in Oceanography, 2021, vol. 193, p. 102559https://doi.org/10.1016/j.pocean.2021.102559cc-by (c) Borrell Thió, Assumpció et al., 2021http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1843582026-05-27T06:46:51Z
dc.title.none.fl_str_mv Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
title Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
spellingShingle Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
Borrell Thió, Assumpció
Mediterrània (Mar)
Cetacis
Espanya
Mediterranean Sea
Cetacea
Spain
title_short Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
title_full Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
title_fullStr Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
title_full_unstemmed Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
title_sort Niche partitioning amongst northwestern Mediterranean cetaceans using stable isotopes
dc.creator.none.fl_str_mv Borrell Thió, Assumpció
Gazo i Pérez, Manel
Aguilar, Àlex
Raga, Juan A.
Degollada, Eduard
Gozalbes, Patricia
García-Vernet, Raquel
author Borrell Thió, Assumpció
author_facet Borrell Thió, Assumpció
Gazo i Pérez, Manel
Aguilar, Àlex
Raga, Juan A.
Degollada, Eduard
Gozalbes, Patricia
García-Vernet, Raquel
author_role author
author2 Gazo i Pérez, Manel
Aguilar, Àlex
Raga, Juan A.
Degollada, Eduard
Gozalbes, Patricia
García-Vernet, Raquel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Mediterrània (Mar)
Cetacis
Espanya
Mediterranean Sea
Cetacea
Spain
topic Mediterrània (Mar)
Cetacis
Espanya
Mediterranean Sea
Cetacea
Spain
description Ten species of cetaceans coexist in the Mediterranean Sea, one of the richest seas in biodiversity and endemisms worldwide. The conservation status of Mediterranean cetaceans has been a concern for many years, particularly due to increasing anthropogenic threats such as global warming and overfishing. We established the stable isotopic niches of carbon, nitrogen, and sulphur for five species of cetaceans inhabiting the northwestern Mediterranean Sea to elucidate the mechanisms of coexistence. The fin whale exploited epipelagic habitats with a low trophic level; the bottlenose dolphin was mostly neritic and had a high trophic level; the Risso's dolphin was oceanic and fed bathypelagically and at a high trophic level; finally, the common and striped dolphins displayed epipelagic distributions and similarly intermediate trophic levels. The isotopic niches of all species were exclusive except the common and striped dolphins, whose niches overlapped by 25%. These results suggest that the majority of species avoid competitive exclusion by trophic or spatial segregation with the exception of striped and common dolphins, in which interspecific competition is apparent. It is suggested that this competition brought the striped dolphin to displace the common dolphin from part of its distribution range, restricting it to the southern fringe of the western Mediterranean and, particularly, to the Alboran Sea. In this area, coexistence of the two species would be permitted by some degree of spatial segregation between them and a remarkably high productivity, all which mitigate competition.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/184358
url https://hdl.handle.net/2445/184358
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.pocean.2021.102559
Progress in Oceanography, 2021, vol. 193, p. 102559
https://doi.org/10.1016/j.pocean.2021.102559
dc.rights.none.fl_str_mv cc-by (c) Borrell Thió, Assumpció et al., 2021
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Borrell Thió, Assumpció et al., 2021
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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