Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O

Detailed knowledge on habitat use by marine mammals is critical to understand their role in the ecosystem. The stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) have been widely used to study the trophic ecology of marine mammals, but the stable isotope ratios of other elements such as sulf...

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Detalles Bibliográficos
Autores: Cani, Alessandra, Cardona Pascual, Luis, Valdivia, Meica, González, Enrique M., Drago, Massimiliano
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/220649
Acceso en línea:https://hdl.handle.net/2445/220649
Access Level:acceso abierto
Palabra clave:Isòtops estables en ecologia
Mamífers marins
Riu de la Plata (Estuari)
Stable isotopes in ecological research
Marine mammals
Río de la Plata (Estuary)
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spelling Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and OCani, AlessandraCardona Pascual, LuisValdivia, MeicaGonzález, Enrique M.Drago, MassimilianoIsòtops estables en ecologiaMamífers marinsRiu de la Plata (Estuari)Stable isotopes in ecological researchMarine mammalsRío de la Plata (Estuary)Detailed knowledge on habitat use by marine mammals is critical to understand their role in the ecosystem. The stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) have been widely used to study the trophic ecology of marine mammals, but the stable isotope ratios of other elements such as sulfur (δ34S) and oxygen (δ18O) can better inform about habitat use in areas with strong salinity and redox gradients. The Río de la Plata estuary represents the largest freshwater runoff in the south-western Atlantic Ocean and supports a rich community of marine mammals. Here, we analyzed δ34S values in bone from seven marine mammal species inhabiting the estuary and the adjacent Atlantic Ocean, in order to complement previous isotopic data (δ13C, δ15N and δ18O) and compare their resolution as habitat tracers. As expected, δ34S and δ18O offered relevant insights into the characterization of the habitat used by marine mammals and allowed a better delineation of habitat partitioning between them. Bottlenose dolphins, South American sea lions and South American fur seals seem to be frequent users of the less saline areas of the estuary, whereas Burmeister´s porpoises, franciscana dolphins and false killer whales seemed to prefer the saltier marine waters close to the bottom. Fraser´s dolphins were the only inhabitants of true offshore waters. Our findings demonstrate how the integration of different stable isotope ratios can help disentangle fine habitat partitioning between marine mammals living in a complex ecosystem such as Río de la Plata.Springer Verlag2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/220649Articles 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/10.1007/s12237-023-01193-yEstuaries and Coasts, 2023, vol. 46, num.4, p. 1083-1097https://doi.org/10.1007/s12237-023-01193-ycc-by (c) Cani, Alessandra et al., 2023http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2206492026-05-27T06:46:51Z
dc.title.none.fl_str_mv Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
title Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
spellingShingle Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
Cani, Alessandra
Isòtops estables en ecologia
Mamífers marins
Riu de la Plata (Estuari)
Stable isotopes in ecological research
Marine mammals
Río de la Plata (Estuary)
title_short Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
title_full Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
title_fullStr Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
title_full_unstemmed Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
title_sort Niche partitioning among marine mammals inhabiting a large estuary as revealed by stable isotopes of C, N, S and O
dc.creator.none.fl_str_mv Cani, Alessandra
Cardona Pascual, Luis
Valdivia, Meica
González, Enrique M.
Drago, Massimiliano
author Cani, Alessandra
author_facet Cani, Alessandra
Cardona Pascual, Luis
Valdivia, Meica
González, Enrique M.
Drago, Massimiliano
author_role author
author2 Cardona Pascual, Luis
Valdivia, Meica
González, Enrique M.
Drago, Massimiliano
author2_role author
author
author
author
dc.subject.none.fl_str_mv Isòtops estables en ecologia
Mamífers marins
Riu de la Plata (Estuari)
Stable isotopes in ecological research
Marine mammals
Río de la Plata (Estuary)
topic Isòtops estables en ecologia
Mamífers marins
Riu de la Plata (Estuari)
Stable isotopes in ecological research
Marine mammals
Río de la Plata (Estuary)
description Detailed knowledge on habitat use by marine mammals is critical to understand their role in the ecosystem. The stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) have been widely used to study the trophic ecology of marine mammals, but the stable isotope ratios of other elements such as sulfur (δ34S) and oxygen (δ18O) can better inform about habitat use in areas with strong salinity and redox gradients. The Río de la Plata estuary represents the largest freshwater runoff in the south-western Atlantic Ocean and supports a rich community of marine mammals. Here, we analyzed δ34S values in bone from seven marine mammal species inhabiting the estuary and the adjacent Atlantic Ocean, in order to complement previous isotopic data (δ13C, δ15N and δ18O) and compare their resolution as habitat tracers. As expected, δ34S and δ18O offered relevant insights into the characterization of the habitat used by marine mammals and allowed a better delineation of habitat partitioning between them. Bottlenose dolphins, South American sea lions and South American fur seals seem to be frequent users of the less saline areas of the estuary, whereas Burmeister´s porpoises, franciscana dolphins and false killer whales seemed to prefer the saltier marine waters close to the bottom. Fraser´s dolphins were the only inhabitants of true offshore waters. Our findings demonstrate how the integration of different stable isotope ratios can help disentangle fine habitat partitioning between marine mammals living in a complex ecosystem such as Río de la Plata.
publishDate 2023
dc.date.none.fl_str_mv 2023
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/2445/220649
url https://hdl.handle.net/2445/220649
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/10.1007/s12237-023-01193-y
Estuaries and Coasts, 2023, vol. 46, num.4, p. 1083-1097
https://doi.org/10.1007/s12237-023-01193-y
dc.rights.none.fl_str_mv cc-by (c) Cani, Alessandra et al., 2023
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Cani, Alessandra et al., 2023
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 Springer Verlag
publisher.none.fl_str_mv Springer Verlag
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 15.81155

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