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Holocene changes in the trophic ecology of an apex marine predator in the South Atlantic Ocean

dc.creatorVales, Damián Gustavo
dc.creatorCardona, Luis
dc.creatorZangrando, Atilio Francisco Javier
dc.creatorBorella, Florencia
dc.creatorSaporiti, Fabiana
dc.creatorProsser Goodall, Rae Natalie
dc.creatorRosa de Oliveira, Larissa
dc.creatorCrespo, Enrique Alberto
dc.date2017-02
dc.date.accessioned2021-04-06T18:33:07Z
dc.date.available2021-04-06T18:33:07Z
dc.identifierVales, Damián Gustavo; Cardona, Luis; Zangrando, Atilio Francisco Javier; Borella, Florencia; Saporiti, Fabiana; et al.; Holocene changes in the trophic ecology of an apex marine predator in the South Atlantic Ocean; Springer; Oecologia; 183; 2; 2-2017; 555-570
dc.identifier0029-8549
dc.identifierhttp://hdl.handle.net/11336/39111
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttp://suquia.ffyh.unc.edu.ar/handle/11336/39111
dc.descriptionPredators may modify their diets as a result of both anthropogenic and natural environmental changes. Stable isotope ratios of nitrogen and carbon in bone collagen have been used to reconstruct the foraging ecology of South American fur seals (Arctocephalus australis) in the southwestern South Atlantic Ocean since the Middle Holocene, a region inhabited by hunter-gatherers by millennia and modified by two centuries of whaling, sealing and fishing. Results suggest that the isotopic niche of fur seals from Patagonia has not changed over the last two millennia (average for the period: δ13C2200-0BP = −13.4 ± 0.5‰, δ15N2200-0BP = 20.6 ± 1.1‰). Conversely, Middle Holocene fur seals fed more pelagically than their modern conspecifics in the Río de la Plata region (δ13C7000BP = −15.9 ± 0.6‰ vs. δ13CPRESENT = −13.5 ± 0.8‰) and Tierra del Fuego (δ13C6400-4300BP = −15.4 ± 0.5‰ vs. δ13CPRESENT = −13.2 ± 0.7‰). In the latter region, Middle Holocene fur seals also fed at a higher trophic level than their modern counterparts (δ15N6400-4300BP = 20.5 ± 0.5‰ vs. δ15NPRESENT = 19.0 ± 1.6‰). Nevertheless, a major dietary shift was observed in fur seals from Tierra del Fuego during the nineteenth century (δ13C100BP = −17.2 ± 0.3‰, δ15N100BP = 18.6 ± 0.7‰), when marine primary productivity plummeted and the fur seal population was decimated by sealing. Disentangling the relative roles of natural and anthropogenic factors in explaining this dietary shift is difficult, but certainly the trophic position of fur seals has changed through the Holocene in some South Atlantic regions.
dc.descriptionFil: 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
dc.descriptionFil: Cardona, Luis. Universidad de Barcelona; España
dc.descriptionFil: Zangrando, Atilio Francisco Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.descriptionFil: 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
dc.descriptionFil: Saporiti, Fabiana. Universidad de Barcelona; España
dc.descriptionFil: Prosser Goodall, Rae Natalie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina
dc.descriptionFil: Rosa de Oliveira, Larissa. Universidade do Vale do Rio dos Sinos; Brasil. Study Group of Aquatic Mammals from Rio Grande do Sul ; Brasil
dc.descriptionFil: 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. Universidad Nacional de la Patagonia; Argentina
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dc.languageeng
dc.publisherSpringer
dc.relationinfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00442-016-3781-4
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1007/s00442-016-3781-4
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectARCTOCEPHALUS AUSTRALIS
dc.subjectENVIRONMENTAL CHANGES
dc.subjectFUR SEALS
dc.subjectHISTORICAL ECOLOGY
dc.subjectHUNTER-GATHERERS
dc.subjectSEALING
dc.subjectSTABLE ISOTOPES
dc.subjectOtras Ciencias Biológicas
dc.subjectCiencias Biológicas
dc.subjectCIENCIAS NATURALES Y EXACTAS
dc.titleHolocene changes in the trophic ecology of an apex marine predator in the South Atlantic Ocean
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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