Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)

Autores
Iglesias, Virginia; Whitlock, Cathy; Markgraf, Vera; Bianchi, Maria Martha
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Iglesias, Virginia. State University of Montana; Estados Unidos
Fil: Whitlock, Cathy. State University of Montana; Estados Unidos
Fil: Markgraf, Vera. State University of Colorado Boulder; Estados Unidos. University of Arizona; Estados Unidos
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
Materia
Vegetation History
Fire History
Patagonia
Nothofagus
Austrocedrus
Pollen
Holocene
Isopolls
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:11336/35906
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)Iglesias, VirginiaWhitlock, CathyMarkgraf, VeraBianchi, Maria MarthaVegetation HistoryFire HistoryPatagoniaNothofagusAustrocedrusPollenHoloceneIsopollshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Patagonian 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.Fil: Iglesias, Virginia. State University of Montana; Estados UnidosFil: Whitlock, Cathy. State University of Montana; Estados UnidosFil: Markgraf, Vera. State University of Colorado Boulder; Estados Unidos. University of Arizona; Estados UnidosFil: 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"; ArgentinaPergamon-Elsevier Science Ltd.2014-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/35906Iglesias, 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; 120-1350277-3791CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2014.04.014info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379114001309info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:19:04Zoai:ri.conicet.gov.ar:11336/35906instacron: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 10:19:05.238CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
title Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
spellingShingle Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
Iglesias, Virginia
Vegetation History
Fire History
Patagonia
Nothofagus
Austrocedrus
Pollen
Holocene
Isopolls
title_short Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
title_full Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
title_fullStr Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
title_full_unstemmed Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
title_sort Postglacial history of the Patagonian forest/steppe ecotone (41–43°S)
dc.creator.none.fl_str_mv Iglesias, Virginia
Whitlock, Cathy
Markgraf, Vera
Bianchi, Maria Martha
author Iglesias, Virginia
author_facet Iglesias, Virginia
Whitlock, Cathy
Markgraf, Vera
Bianchi, Maria Martha
author_role author
author2 Whitlock, Cathy
Markgraf, Vera
Bianchi, Maria Martha
author2_role author
author
author
dc.subject.none.fl_str_mv Vegetation History
Fire History
Patagonia
Nothofagus
Austrocedrus
Pollen
Holocene
Isopolls
topic Vegetation History
Fire History
Patagonia
Nothofagus
Austrocedrus
Pollen
Holocene
Isopolls
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Iglesias, Virginia. State University of Montana; Estados Unidos
Fil: Whitlock, Cathy. State University of Montana; Estados Unidos
Fil: Markgraf, Vera. State University of Colorado Boulder; Estados Unidos. University of Arizona; Estados Unidos
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
description 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.
publishDate 2014
dc.date.none.fl_str_mv 2014-10
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/11336/35906
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
0277-3791
CONICET Digital
CONICET
url http://hdl.handle.net/11336/35906
identifier_str_mv 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
0277-3791
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2014.04.014
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277379114001309
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
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd.
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd.
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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