Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)

Autores
Iglesias, Virginia; Whitlock, Cathy; Bianchi, Maria Martha; Villarosa, Gustavo; Outes, Ana Valeria
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Patagonian vegetation has dramatically changed in composition and distribution over the last 16,000. yr. Although patterns of vegetation change are relatively clear, our understanding of the processes that produce them is limited. High-resolution pollen and charcoal records from two lakes located at lat 41°S provide new information on the postglacial history of vegetation and fire activity at the forest-steppe ecotone, and help clarify the relative importance of local and regional drivers of late-Holocene ecological change. Our results suggest that late-glacial parkland was colonized by shrubs at ca. 11,200. cal. yr BP and this vegetation persisted until 4900. cal. yr BP, when increased humidity allowed for the establishment of Nothofagus forest. The late Holocene is characterized by oscillations in forest dominance largely driven by changes in humidity, possibly associated with the onset or strengthening of ENSO. In the last 4900. yr, humid periods (4900-3800 and 2850-1350. cal. yr BP) have promoted Nothofagus forest, whereas drier times (3800-2850 and 1350-450. cal. yr BP) have favored Austrocedrus expansion. At intermediate moisture levels, however, the lower forest supported both taxa, and fire became an important control of community composition, with severe, infrequent fires facilitating Nothofagus regeneration and high fire frequency and intensity supporting Austrocedrus. © 2012.
Fil: Iglesias, Virginia. State University of Montana; Estados Unidos
Fil: Whitlock, Cathy. State University of Montana; Estados Unidos
Fil: Bianchi, Maria Martha. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
Fil: Villarosa, Gustavo. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
Fil: Outes, Ana Valeria. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
Materia
Charcoal
Forest/Steppe Ecotone
Holocene Climate
Paleoecology
Patagonia
Pollen
Vegetation And Fire History
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:11336/70972
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/70972
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)Iglesias, VirginiaWhitlock, CathyBianchi, Maria MarthaVillarosa, GustavoOutes, Ana ValeriaCharcoalForest/Steppe EcotoneHolocene ClimatePaleoecologyPatagoniaPollenVegetation And Fire Historyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Patagonian vegetation has dramatically changed in composition and distribution over the last 16,000. yr. Although patterns of vegetation change are relatively clear, our understanding of the processes that produce them is limited. High-resolution pollen and charcoal records from two lakes located at lat 41°S provide new information on the postglacial history of vegetation and fire activity at the forest-steppe ecotone, and help clarify the relative importance of local and regional drivers of late-Holocene ecological change. Our results suggest that late-glacial parkland was colonized by shrubs at ca. 11,200. cal. yr BP and this vegetation persisted until 4900. cal. yr BP, when increased humidity allowed for the establishment of Nothofagus forest. The late Holocene is characterized by oscillations in forest dominance largely driven by changes in humidity, possibly associated with the onset or strengthening of ENSO. In the last 4900. yr, humid periods (4900-3800 and 2850-1350. cal. yr BP) have promoted Nothofagus forest, whereas drier times (3800-2850 and 1350-450. cal. yr BP) have favored Austrocedrus expansion. At intermediate moisture levels, however, the lower forest supported both taxa, and fire became an important control of community composition, with severe, infrequent fires facilitating Nothofagus regeneration and high fire frequency and intensity supporting Austrocedrus. © 2012.Fil: Iglesias, Virginia. State University of Montana; Estados UnidosFil: Whitlock, Cathy. State University of Montana; Estados UnidosFil: Bianchi, Maria Martha. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; ArgentinaFil: Villarosa, Gustavo. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; ArgentinaFil: Outes, Ana Valeria. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; ArgentinaAcademic Press Inc Elsevier Science2012-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/70972Iglesias, Virginia; Whitlock, Cathy; Bianchi, Maria Martha; Villarosa, Gustavo; Outes, Ana Valeria; Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S); Academic Press Inc Elsevier Science; Quaternary Research; 78; 3; 11-2012; 502-5120033-5894CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0033589412000841info:eu-repo/semantics/altIdentifier/doi/10.1016/j.yqres.2012.07.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:04:28Zoai:ri.conicet.gov.ar:11336/70972instacron: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 10:04:29.224CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
title Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
spellingShingle Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
Iglesias, Virginia
Charcoal
Forest/Steppe Ecotone
Holocene Climate
Paleoecology
Patagonia
Pollen
Vegetation And Fire History
title_short Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
title_full Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
title_fullStr Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
title_full_unstemmed Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
title_sort Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S)
dc.creator.none.fl_str_mv Iglesias, Virginia
Whitlock, Cathy
Bianchi, Maria Martha
Villarosa, Gustavo
Outes, Ana Valeria
author Iglesias, Virginia
author_facet Iglesias, Virginia
Whitlock, Cathy
Bianchi, Maria Martha
Villarosa, Gustavo
Outes, Ana Valeria
author_role author
author2 Whitlock, Cathy
Bianchi, Maria Martha
Villarosa, Gustavo
Outes, Ana Valeria
author2_role author
author
author
author
dc.subject.none.fl_str_mv Charcoal
Forest/Steppe Ecotone
Holocene Climate
Paleoecology
Patagonia
Pollen
Vegetation And Fire History
topic Charcoal
Forest/Steppe Ecotone
Holocene Climate
Paleoecology
Patagonia
Pollen
Vegetation And Fire History
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 16,000. yr. Although patterns of vegetation change are relatively clear, our understanding of the processes that produce them is limited. High-resolution pollen and charcoal records from two lakes located at lat 41°S provide new information on the postglacial history of vegetation and fire activity at the forest-steppe ecotone, and help clarify the relative importance of local and regional drivers of late-Holocene ecological change. Our results suggest that late-glacial parkland was colonized by shrubs at ca. 11,200. cal. yr BP and this vegetation persisted until 4900. cal. yr BP, when increased humidity allowed for the establishment of Nothofagus forest. The late Holocene is characterized by oscillations in forest dominance largely driven by changes in humidity, possibly associated with the onset or strengthening of ENSO. In the last 4900. yr, humid periods (4900-3800 and 2850-1350. cal. yr BP) have promoted Nothofagus forest, whereas drier times (3800-2850 and 1350-450. cal. yr BP) have favored Austrocedrus expansion. At intermediate moisture levels, however, the lower forest supported both taxa, and fire became an important control of community composition, with severe, infrequent fires facilitating Nothofagus regeneration and high fire frequency and intensity supporting Austrocedrus. © 2012.
Fil: Iglesias, Virginia. State University of Montana; Estados Unidos
Fil: Whitlock, Cathy. State University of Montana; Estados Unidos
Fil: Bianchi, Maria Martha. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
Fil: Villarosa, Gustavo. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
Fil: Outes, Ana Valeria. Universidad Nacional del Comahue. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Patagónico de Estudios de Humanidades y Ciencias Sociales.; Argentina
description Patagonian vegetation has dramatically changed in composition and distribution over the last 16,000. yr. Although patterns of vegetation change are relatively clear, our understanding of the processes that produce them is limited. High-resolution pollen and charcoal records from two lakes located at lat 41°S provide new information on the postglacial history of vegetation and fire activity at the forest-steppe ecotone, and help clarify the relative importance of local and regional drivers of late-Holocene ecological change. Our results suggest that late-glacial parkland was colonized by shrubs at ca. 11,200. cal. yr BP and this vegetation persisted until 4900. cal. yr BP, when increased humidity allowed for the establishment of Nothofagus forest. The late Holocene is characterized by oscillations in forest dominance largely driven by changes in humidity, possibly associated with the onset or strengthening of ENSO. In the last 4900. yr, humid periods (4900-3800 and 2850-1350. cal. yr BP) have promoted Nothofagus forest, whereas drier times (3800-2850 and 1350-450. cal. yr BP) have favored Austrocedrus expansion. At intermediate moisture levels, however, the lower forest supported both taxa, and fire became an important control of community composition, with severe, infrequent fires facilitating Nothofagus regeneration and high fire frequency and intensity supporting Austrocedrus. © 2012.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/70972
Iglesias, Virginia; Whitlock, Cathy; Bianchi, Maria Martha; Villarosa, Gustavo; Outes, Ana Valeria; Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S); Academic Press Inc Elsevier Science; Quaternary Research; 78; 3; 11-2012; 502-512
0033-5894
CONICET Digital
CONICET
url http://hdl.handle.net/11336/70972
identifier_str_mv Iglesias, Virginia; Whitlock, Cathy; Bianchi, Maria Martha; Villarosa, Gustavo; Outes, Ana Valeria; Climate and local controls of long-term vegetation dynamics in northern Patagonia (Lat 41°S); Academic Press Inc Elsevier Science; Quaternary Research; 78; 3; 11-2012; 502-512
0033-5894
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0033589412000841
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.yqres.2012.07.004
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
dc.publisher.none.fl_str_mv Academic Press Inc Elsevier Science
publisher.none.fl_str_mv Academic Press Inc Elsevier Science
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 13.069144

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