Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study

Autores
Zenteno, Lisette; Borella, Florencia; Gomez Otero, Julieta; Piana, Ernesto Luis; Belardi, Juan Bautista; Borrero, Luis Alberto; Saporiti, Fabiana; Cardona, Luis; Crespo, Enrique Alberto
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Stable isotope ratios of carbon and nitrogen in archaeological and modern bone samples havebeen used to reconstruct the dietary changes of the South American sea lion Otaria flavescens from the late Holocene to the present in the southwestern Atlantic. We sampled bones from archaeological sites in northern-central and southern Patagonia, Argentina, and bones housed in modern scientific collections. Additionally, we analyzed the stable isotope ratios in ancient and modern shells of intertidal molluscs to explore changes in the isotope baseline and allowcomparison between bone samples from different periods after correction for baseline shifts. Results confirmed the trophic plasticity of the South American sea lion, demonstrated the much larger impact ofmodern exploitation of marine resources as compared with that of hunter-gatherers, and underscored the dissimilarity between the past and modern niches of exploited species. These conclusions are supported by the rather stable diet of SouthAmerican sea lions during severalmillennia of aboriginal exploitation, in both northern-central and southern Patagonia, and the dramatic increase in trophic level observed during the twentieth century. The recent increase in trophic levelmight be related to the smaller population size resulting from modern sealing and the resulting reduced intraspecific competition. These results demonstrate how much can be learned about the ecology of modern species thanks to retrospective studies beyond the current, anthropogenically modified setting where ecosystem structure is totally different from that in the pristine environments where current species evolved.
Fil: Zenteno, Lisette. Universidad de Barcelona; España
Fil: Borella, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
Fil: Gomez Otero, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Piana, Ernesto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Belardi, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina
Fil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; Argentina
Fil: Saporiti, Fabiana. Universidad de Barcelona; España
Fil: Cardona, Luis. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Materia
Otaria Flavescens
Diet
Stable Isotopes
Trophic Level
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/236478
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case studyZenteno, LisetteBorella, FlorenciaGomez Otero, JulietaPiana, Ernesto LuisBelardi, Juan BautistaBorrero, Luis AlbertoSaporiti, FabianaCardona, LuisCrespo, Enrique AlbertoOtaria FlavescensDietStable IsotopesTrophic Levelhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Stable isotope ratios of carbon and nitrogen in archaeological and modern bone samples havebeen used to reconstruct the dietary changes of the South American sea lion Otaria flavescens from the late Holocene to the present in the southwestern Atlantic. We sampled bones from archaeological sites in northern-central and southern Patagonia, Argentina, and bones housed in modern scientific collections. Additionally, we analyzed the stable isotope ratios in ancient and modern shells of intertidal molluscs to explore changes in the isotope baseline and allowcomparison between bone samples from different periods after correction for baseline shifts. Results confirmed the trophic plasticity of the South American sea lion, demonstrated the much larger impact ofmodern exploitation of marine resources as compared with that of hunter-gatherers, and underscored the dissimilarity between the past and modern niches of exploited species. These conclusions are supported by the rather stable diet of SouthAmerican sea lions during severalmillennia of aboriginal exploitation, in both northern-central and southern Patagonia, and the dramatic increase in trophic level observed during the twentieth century. The recent increase in trophic levelmight be related to the smaller population size resulting from modern sealing and the resulting reduced intraspecific competition. These results demonstrate how much can be learned about the ecology of modern species thanks to retrospective studies beyond the current, anthropogenically modified setting where ecosystem structure is totally different from that in the pristine environments where current species evolved.Fil: Zenteno, Lisette. Universidad de Barcelona; EspañaFil: Borella, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; ArgentinaFil: Gomez Otero, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Piana, Ernesto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Belardi, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; ArgentinaFil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; ArgentinaFil: Saporiti, Fabiana. Universidad de Barcelona; EspañaFil: Cardona, Luis. Universidad de Barcelona; EspañaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaCambridge University Press2015-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/236478Zenteno, Lisette; Borella, Florencia; Gomez Otero, Julieta; Piana, Ernesto Luis; Belardi, Juan Bautista; et al.; Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study; Cambridge University Press; Paleobiology; 41; Supplement 3; 6-2015; 387-4010094-8373CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/paleobiology/article/abs/shifting-niches-of-marine-predators-due-to-human-exploitation-the-diet-of-the-south-american-sea-lion-otaria-flavescens-since-the-late-holocene-as-a-case-study/7EAFB497F11BDAB27380186F292C17F2info:eu-repo/semantics/altIdentifier/doi/10.1017/pab.2015.9info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:43:13Zoai:ri.conicet.gov.ar:11336/236478instacron: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 09:43:13.655CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
title Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
spellingShingle Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
Zenteno, Lisette
Otaria Flavescens
Diet
Stable Isotopes
Trophic Level
title_short Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
title_full Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
title_fullStr Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
title_full_unstemmed Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
title_sort Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
dc.creator.none.fl_str_mv Zenteno, Lisette
Borella, Florencia
Gomez Otero, Julieta
Piana, Ernesto Luis
Belardi, Juan Bautista
Borrero, Luis Alberto
Saporiti, Fabiana
Cardona, Luis
Crespo, Enrique Alberto
author Zenteno, Lisette
author_facet Zenteno, Lisette
Borella, Florencia
Gomez Otero, Julieta
Piana, Ernesto Luis
Belardi, Juan Bautista
Borrero, Luis Alberto
Saporiti, Fabiana
Cardona, Luis
Crespo, Enrique Alberto
author_role author
author2 Borella, Florencia
Gomez Otero, Julieta
Piana, Ernesto Luis
Belardi, Juan Bautista
Borrero, Luis Alberto
Saporiti, Fabiana
Cardona, Luis
Crespo, Enrique Alberto
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Otaria Flavescens
Diet
Stable Isotopes
Trophic Level
topic Otaria Flavescens
Diet
Stable Isotopes
Trophic Level
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Stable isotope ratios of carbon and nitrogen in archaeological and modern bone samples havebeen used to reconstruct the dietary changes of the South American sea lion Otaria flavescens from the late Holocene to the present in the southwestern Atlantic. We sampled bones from archaeological sites in northern-central and southern Patagonia, Argentina, and bones housed in modern scientific collections. Additionally, we analyzed the stable isotope ratios in ancient and modern shells of intertidal molluscs to explore changes in the isotope baseline and allowcomparison between bone samples from different periods after correction for baseline shifts. Results confirmed the trophic plasticity of the South American sea lion, demonstrated the much larger impact ofmodern exploitation of marine resources as compared with that of hunter-gatherers, and underscored the dissimilarity between the past and modern niches of exploited species. These conclusions are supported by the rather stable diet of SouthAmerican sea lions during severalmillennia of aboriginal exploitation, in both northern-central and southern Patagonia, and the dramatic increase in trophic level observed during the twentieth century. The recent increase in trophic levelmight be related to the smaller population size resulting from modern sealing and the resulting reduced intraspecific competition. These results demonstrate how much can be learned about the ecology of modern species thanks to retrospective studies beyond the current, anthropogenically modified setting where ecosystem structure is totally different from that in the pristine environments where current species evolved.
Fil: Zenteno, Lisette. Universidad de Barcelona; España
Fil: Borella, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
Fil: Gomez Otero, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Piana, Ernesto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Belardi, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina
Fil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; Argentina
Fil: Saporiti, Fabiana. Universidad de Barcelona; España
Fil: Cardona, Luis. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
description Stable isotope ratios of carbon and nitrogen in archaeological and modern bone samples havebeen used to reconstruct the dietary changes of the South American sea lion Otaria flavescens from the late Holocene to the present in the southwestern Atlantic. We sampled bones from archaeological sites in northern-central and southern Patagonia, Argentina, and bones housed in modern scientific collections. Additionally, we analyzed the stable isotope ratios in ancient and modern shells of intertidal molluscs to explore changes in the isotope baseline and allowcomparison between bone samples from different periods after correction for baseline shifts. Results confirmed the trophic plasticity of the South American sea lion, demonstrated the much larger impact ofmodern exploitation of marine resources as compared with that of hunter-gatherers, and underscored the dissimilarity between the past and modern niches of exploited species. These conclusions are supported by the rather stable diet of SouthAmerican sea lions during severalmillennia of aboriginal exploitation, in both northern-central and southern Patagonia, and the dramatic increase in trophic level observed during the twentieth century. The recent increase in trophic levelmight be related to the smaller population size resulting from modern sealing and the resulting reduced intraspecific competition. These results demonstrate how much can be learned about the ecology of modern species thanks to retrospective studies beyond the current, anthropogenically modified setting where ecosystem structure is totally different from that in the pristine environments where current species evolved.
publishDate 2015
dc.date.none.fl_str_mv 2015-06
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/11336/236478
Zenteno, Lisette; Borella, Florencia; Gomez Otero, Julieta; Piana, Ernesto Luis; Belardi, Juan Bautista; et al.; Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study; Cambridge University Press; Paleobiology; 41; Supplement 3; 6-2015; 387-401
0094-8373
CONICET Digital
CONICET
url http://hdl.handle.net/11336/236478
identifier_str_mv Zenteno, Lisette; Borella, Florencia; Gomez Otero, Julieta; Piana, Ernesto Luis; Belardi, Juan Bautista; et al.; Shifting niches of marine predators due to human exploitation: The diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study; Cambridge University Press; Paleobiology; 41; Supplement 3; 6-2015; 387-401
0094-8373
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.cambridge.org/core/journals/paleobiology/article/abs/shifting-niches-of-marine-predators-due-to-human-exploitation-the-diet-of-the-south-american-sea-lion-otaria-flavescens-since-the-late-holocene-as-a-case-study/7EAFB497F11BDAB27380186F292C17F2
info:eu-repo/semantics/altIdentifier/doi/10.1017/pab.2015.9
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
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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