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dc.contributor.author
Iglesias, Virginia
dc.contributor.author
Whitlock, Cathy
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Markgraf, Vera
dc.contributor.author
Bianchi, Maria Martha
dc.date.available
2018-02-06T21:16:20Z
dc.date.issued
2014-10
dc.identifier.citation
Iglesias, Virginia; Whitlock, Cathy; Markgraf, Vera; Bianchi, Maria Martha; Postglacial history of the Patagonian forest/steppe ecotone (41–43°S); Pergamon-Elsevier Science Ltd.; Quaternary Science Reviews; 94; 10-2014; 120-135
dc.identifier.issn
0277-3791
dc.identifier.uri
http://hdl.handle.net/11336/35906
dc.description.abstract
Patagonian vegetation has dramatically changed in composition and distribution over the last 23,000 years. Although the vegetation history has been inferred from individual pollen records, the regional patterns and drivers of vegetation development are poorly understood. High resolution pollen and charcoal data from eleven sites located along the eastern flanks of the Patagonian Andes (41–43°S) were examined to reconstruct the Lateglacial and Holocene vegetation and fire history of steppe/forest ecotone and separate the relative influence of climatic versus non-climatic factors in shaping the patterns of ecological change. Pollen data indicate that, as the Lateglacial climate became progressively wetter, the initial steppe vegetation was replaced by open forest of Nothofagus in the Lateglacial and early Holocene periods, and by closed forest in the late Holocene. Fire activity was lowest during the Lateglacial/early-Holocene transition and gradually increased through the Holocene. Prior to ca 5000 cal yr BP, the conifer Austrocedrus chilensis possibly persisted in isolated populations along the eastern boundary of its modern distribution. Cooler/more humid conditions after ca 5000 cal yr BP allowed the development of the modern mixed Nothofagus–Austrocedrus forest. The paleoenvironmental record points to the sensitivity of the forest/steppe ecotone in the past, not only to climate but also to complex environmental feedbacks that amplified the effects of climate change.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd.
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Vegetation History
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Fire History
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Patagonia
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Nothofagus
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Austrocedrus
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Pollen
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Holocene
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Isopolls
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-02-06T20:05:59Z
dc.journal.volume
94
dc.journal.pagination
120-135
dc.journal.pais
Estados Unidos
dc.journal.ciudad
New York
dc.description.fil
Fil: Iglesias, Virginia. State University of Montana; Estados Unidos
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Fil: Whitlock, Cathy. State University of Montana; Estados Unidos
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Fil: Markgraf, Vera. State University of Colorado Boulder; Estados Unidos. University of Arizona; Estados Unidos
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Fil: Bianchi, Maria Martha. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.journal.title
Quaternary Science Reviews
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.quascirev.2014.04.014
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info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379114001309