Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem

Autores
Vales, Damián Gustavo; Cardona, Luis; Loizaga de Castro, Rocio; García, Néstor A.; Crespo, Enrique Alberto
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After the collapse of hake stocks (Merluccius hubbsi) provoked by fisheries over the Patagonian shelf in 1997 profound changes have taken place in the community, including long-term dietary shifts in some marine vertebrate predators. Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios in bone collagen of subadult and adult male South American fur seals (Arctocephalus australis) were measured for the period 1976–2017 to investigate if the changes occurred in the marine community from northern and central Patagonia affected the diet of this predator. Suess corrected δ13C values and δ15N values in bone collagen of fur seals did not change significantly over the study period. According to this, male fur seals have remained as pelagic foragers without changing their trophic position nor switching their main preys in the Patagonian food web over the last four decades. This long-term stability in the diet of fur seals contrasts with dietary changes reported for benthic foragers in the region. Although long-term diet studies are restricted to a few marine predators in the region, current evidence suggests that benthic-demersal foragers were more prone to dietary shifts than pelagic ones after perturbations that occurred in the marine community of northern and central Patagonia.
Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Cardona, Luis. Universidad de Barcelona; España
Fil: Loizaga de Castro, Rocio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: García, Néstor A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Materia
COLLAGEN
DIETARY RECONSTRUCTION
HIGH TROPHIC LEVEL MARINE PREDATOR
PATAGONIAN SHELF
SOUTH AMERICAN FUR SEALS
STABLE ISOTOPE ANALYSIS
Δ13C
Δ15N
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/117260
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/117260
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine EcosystemVales, Damián GustavoCardona, LuisLoizaga de Castro, RocioGarcía, Néstor A.Crespo, Enrique AlbertoCOLLAGENDIETARY RECONSTRUCTIONHIGH TROPHIC LEVEL MARINE PREDATORPATAGONIAN SHELFSOUTH AMERICAN FUR SEALSSTABLE ISOTOPE ANALYSISΔ13CΔ15Nhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After the collapse of hake stocks (Merluccius hubbsi) provoked by fisheries over the Patagonian shelf in 1997 profound changes have taken place in the community, including long-term dietary shifts in some marine vertebrate predators. Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios in bone collagen of subadult and adult male South American fur seals (Arctocephalus australis) were measured for the period 1976–2017 to investigate if the changes occurred in the marine community from northern and central Patagonia affected the diet of this predator. Suess corrected δ13C values and δ15N values in bone collagen of fur seals did not change significantly over the study period. According to this, male fur seals have remained as pelagic foragers without changing their trophic position nor switching their main preys in the Patagonian food web over the last four decades. This long-term stability in the diet of fur seals contrasts with dietary changes reported for benthic foragers in the region. Although long-term diet studies are restricted to a few marine predators in the region, current evidence suggests that benthic-demersal foragers were more prone to dietary shifts than pelagic ones after perturbations that occurred in the marine community of northern and central Patagonia.Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Cardona, Luis. Universidad de Barcelona; EspañaFil: Loizaga de Castro, Rocio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: García, Néstor A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFrontiers Media S.A.2020-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/117260Vales, Damián Gustavo; Cardona, Luis; Loizaga de Castro, Rocio; García, Néstor A.; Crespo, Enrique Alberto; Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem; Frontiers Media S.A.; Frontiers In Marine Science; 7; 87; 2-2020; 1-102296-7745CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/article/10.3389/fmars.2020.00087/fullinfo:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.00087info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:43:51Zoai:ri.conicet.gov.ar:11336/117260instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:43:51.904CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
title Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
spellingShingle Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
Vales, Damián Gustavo
COLLAGEN
DIETARY RECONSTRUCTION
HIGH TROPHIC LEVEL MARINE PREDATOR
PATAGONIAN SHELF
SOUTH AMERICAN FUR SEALS
STABLE ISOTOPE ANALYSIS
Δ13C
Δ15N
title_short Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
title_full Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
title_fullStr Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
title_full_unstemmed Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
title_sort Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem
dc.creator.none.fl_str_mv Vales, Damián Gustavo
Cardona, Luis
Loizaga de Castro, Rocio
García, Néstor A.
Crespo, Enrique Alberto
author Vales, Damián Gustavo
author_facet Vales, Damián Gustavo
Cardona, Luis
Loizaga de Castro, Rocio
García, Néstor A.
Crespo, Enrique Alberto
author_role author
author2 Cardona, Luis
Loizaga de Castro, Rocio
García, Néstor A.
Crespo, Enrique Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv COLLAGEN
DIETARY RECONSTRUCTION
HIGH TROPHIC LEVEL MARINE PREDATOR
PATAGONIAN SHELF
SOUTH AMERICAN FUR SEALS
STABLE ISOTOPE ANALYSIS
Δ13C
Δ15N
topic COLLAGEN
DIETARY RECONSTRUCTION
HIGH TROPHIC LEVEL MARINE PREDATOR
PATAGONIAN SHELF
SOUTH AMERICAN FUR SEALS
STABLE ISOTOPE ANALYSIS
Δ13C
Δ15N
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After the collapse of hake stocks (Merluccius hubbsi) provoked by fisheries over the Patagonian shelf in 1997 profound changes have taken place in the community, including long-term dietary shifts in some marine vertebrate predators. Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios in bone collagen of subadult and adult male South American fur seals (Arctocephalus australis) were measured for the period 1976–2017 to investigate if the changes occurred in the marine community from northern and central Patagonia affected the diet of this predator. Suess corrected δ13C values and δ15N values in bone collagen of fur seals did not change significantly over the study period. According to this, male fur seals have remained as pelagic foragers without changing their trophic position nor switching their main preys in the Patagonian food web over the last four decades. This long-term stability in the diet of fur seals contrasts with dietary changes reported for benthic foragers in the region. Although long-term diet studies are restricted to a few marine predators in the region, current evidence suggests that benthic-demersal foragers were more prone to dietary shifts than pelagic ones after perturbations that occurred in the marine community of northern and central Patagonia.
Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Cardona, Luis. Universidad de Barcelona; España
Fil: Loizaga de Castro, Rocio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: García, Néstor A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
description Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After the collapse of hake stocks (Merluccius hubbsi) provoked by fisheries over the Patagonian shelf in 1997 profound changes have taken place in the community, including long-term dietary shifts in some marine vertebrate predators. Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios in bone collagen of subadult and adult male South American fur seals (Arctocephalus australis) were measured for the period 1976–2017 to investigate if the changes occurred in the marine community from northern and central Patagonia affected the diet of this predator. Suess corrected δ13C values and δ15N values in bone collagen of fur seals did not change significantly over the study period. According to this, male fur seals have remained as pelagic foragers without changing their trophic position nor switching their main preys in the Patagonian food web over the last four decades. This long-term stability in the diet of fur seals contrasts with dietary changes reported for benthic foragers in the region. Although long-term diet studies are restricted to a few marine predators in the region, current evidence suggests that benthic-demersal foragers were more prone to dietary shifts than pelagic ones after perturbations that occurred in the marine community of northern and central Patagonia.
publishDate 2020
dc.date.none.fl_str_mv 2020-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/117260
Vales, Damián Gustavo; Cardona, Luis; Loizaga de Castro, Rocio; García, Néstor A.; Crespo, Enrique Alberto; Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem; Frontiers Media S.A.; Frontiers In Marine Science; 7; 87; 2-2020; 1-10
2296-7745
CONICET Digital
CONICET
url http://hdl.handle.net/11336/117260
identifier_str_mv Vales, Damián Gustavo; Cardona, Luis; Loizaga de Castro, Rocio; García, Néstor A.; Crespo, Enrique Alberto; Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem; Frontiers Media S.A.; Frontiers In Marine Science; 7; 87; 2-2020; 1-10
2296-7745
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/article/10.3389/fmars.2020.00087/full
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.00087
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Frontiers Media S.A.
publisher.none.fl_str_mv Frontiers Media S.A.
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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