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dc.contributor.author Vales, Damián Gustavo
dc.contributor.author Cardona, Luis
dc.contributor.author Zangrando, Atilio Francisco Javier
dc.contributor.author Borella, Florencia
dc.contributor.author Saporiti, Fabiana
dc.contributor.author Prosser Goodall, Rae Natalie
dc.contributor.author Rosa de Oliveira, Larissa
dc.contributor.author Crespo, Enrique Alberto
dc.date.available 2018-03-16T18:28:11Z
dc.date.issued 2017-02
dc.identifier.citation Vales, 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.identifier.issn 0029-8549
dc.identifier.uri http://hdl.handle.net/11336/39111
dc.description.abstract Predators 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.format application/pdf
dc.language.iso eng
dc.publisher Springer
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject ARCTOCEPHALUS AUSTRALIS
dc.subject ENVIRONMENTAL CHANGES
dc.subject FUR SEALS
dc.subject HISTORICAL ECOLOGY
dc.subject HUNTER-GATHERERS
dc.subject SEALING
dc.subject STABLE ISOTOPES
dc.subject.classification Otras Ciencias Biológicas
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Holocene changes in the trophic ecology of an apex marine predator in the South Atlantic Ocean
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-03-02T15:01:52Z
dc.journal.volume 183
dc.journal.number 2
dc.journal.pagination 555-570
dc.journal.pais Alemania
dc.journal.ciudad Berlin
dc.description.fil 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
dc.description.fil Fil: Cardona, Luis. Universidad de Barcelona; España
dc.description.fil Fil: Zangrando, Atilio Francisco Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil 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
dc.description.fil Fil: Saporiti, Fabiana. Universidad de Barcelona; España
dc.description.fil Fil: 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.description.fil Fil: Rosa de Oliveira, Larissa. Universidade do Vale do Rio dos Sinos; Brasil. Study Group of Aquatic Mammals from Rio Grande do Sul ; Brasil
dc.description.fil 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. Universidad Nacional de la Patagonia; Argentina
dc.journal.title Oecologia
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00442-016-3781-4
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00442-016-3781-4
dc.conicet.fuente unificacion


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  • Articulos(INCUAPA) [182]
    Articulos de INVESTIGACIONES ARQUEOLOGICAS Y PALEONTOLOGICAS DEL CUATERNARIO PAMPEANO
  • Articulos(CESIMAR) [111]
    Articulos de CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS

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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)