Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)

Autores
Bamonte, Florencia Paula; Mancini, Maria Virginia
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Changes in pollen spectra of a sediment core from a wetland in the southern side of Lake San Martin, which is located at 49° 11′ S; 72° 22′ W (near the eastern limit of the Subantarctic Forest–Patagonian Steppe ecotone) reflect variations in the composition of vegetation since the Pleistocene–Holocene transition. Comparison of fossil to modern pollen assemblages allowed us to interpret these palaeoenvironmental changes in terms of moisture availability. Between 11 300 and 9500 cal yr BP, conditions with low moisture availability from Poaceae–Ephedra–Chenopodiaceae pollen assemblage were inferred. From 9500 to 8000 cal yr BP, the grass steppe dominance was interpreted as an increase in moisture availability. The steppe assemblage was replaced by shrub taxa suggesting drier conditions in the mid-Holocene (8000–3000 cal yr BP). Between 3000 and 100 cal yr BP, wetter conditions were inferred from an increase in herb taxa and a decrease in shrubs, while for the last century a grass steppe with higher amounts of shrubs suggests a decrease in moisture availability. Changes in these vegetation assemblages suggest changes in the precipitation patterns related to the position and strength of the westerlies.
Fil: Bamonte, Florencia Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina
Fil: Mancini, Maria Virginia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina
Materia
SOUTHERN PATAGONIA
POLLEN ANALYSIS
PALAEOENVIRONMENTAL RECONSTRUCTION
FOREST-STEPPE ECOTONE
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:11336/245611
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)Bamonte, Florencia PaulaMancini, Maria VirginiaSOUTHERN PATAGONIAPOLLEN ANALYSISPALAEOENVIRONMENTAL RECONSTRUCTIONFOREST-STEPPE ECOTONEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Changes in pollen spectra of a sediment core from a wetland in the southern side of Lake San Martin, which is located at 49° 11′ S; 72° 22′ W (near the eastern limit of the Subantarctic Forest–Patagonian Steppe ecotone) reflect variations in the composition of vegetation since the Pleistocene–Holocene transition. Comparison of fossil to modern pollen assemblages allowed us to interpret these palaeoenvironmental changes in terms of moisture availability. Between 11 300 and 9500 cal yr BP, conditions with low moisture availability from Poaceae–Ephedra–Chenopodiaceae pollen assemblage were inferred. From 9500 to 8000 cal yr BP, the grass steppe dominance was interpreted as an increase in moisture availability. The steppe assemblage was replaced by shrub taxa suggesting drier conditions in the mid-Holocene (8000–3000 cal yr BP). Between 3000 and 100 cal yr BP, wetter conditions were inferred from an increase in herb taxa and a decrease in shrubs, while for the last century a grass steppe with higher amounts of shrubs suggests a decrease in moisture availability. Changes in these vegetation assemblages suggest changes in the precipitation patterns related to the position and strength of the westerlies.Fil: Bamonte, Florencia Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; ArgentinaFil: Mancini, Maria Virginia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; ArgentinaElsevier Science2011-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/245611Bamonte, Florencia Paula; Mancini, Maria Virginia; Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina); Elsevier Science; Review of Palaeobotany and Palynology; 165; 1-2; 5-2011; 103-1100034-6667CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666711000261info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2011.02.003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:44:30Zoai:ri.conicet.gov.ar:11336/245611instacron: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:34982025-10-15 14:44:31.036CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
title Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
spellingShingle Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
Bamonte, Florencia Paula
SOUTHERN PATAGONIA
POLLEN ANALYSIS
PALAEOENVIRONMENTAL RECONSTRUCTION
FOREST-STEPPE ECOTONE
title_short Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
title_full Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
title_fullStr Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
title_full_unstemmed Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
title_sort Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina)
dc.creator.none.fl_str_mv Bamonte, Florencia Paula
Mancini, Maria Virginia
author Bamonte, Florencia Paula
author_facet Bamonte, Florencia Paula
Mancini, Maria Virginia
author_role author
author2 Mancini, Maria Virginia
author2_role author
dc.subject.none.fl_str_mv SOUTHERN PATAGONIA
POLLEN ANALYSIS
PALAEOENVIRONMENTAL RECONSTRUCTION
FOREST-STEPPE ECOTONE
topic SOUTHERN PATAGONIA
POLLEN ANALYSIS
PALAEOENVIRONMENTAL RECONSTRUCTION
FOREST-STEPPE ECOTONE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Changes in pollen spectra of a sediment core from a wetland in the southern side of Lake San Martin, which is located at 49° 11′ S; 72° 22′ W (near the eastern limit of the Subantarctic Forest–Patagonian Steppe ecotone) reflect variations in the composition of vegetation since the Pleistocene–Holocene transition. Comparison of fossil to modern pollen assemblages allowed us to interpret these palaeoenvironmental changes in terms of moisture availability. Between 11 300 and 9500 cal yr BP, conditions with low moisture availability from Poaceae–Ephedra–Chenopodiaceae pollen assemblage were inferred. From 9500 to 8000 cal yr BP, the grass steppe dominance was interpreted as an increase in moisture availability. The steppe assemblage was replaced by shrub taxa suggesting drier conditions in the mid-Holocene (8000–3000 cal yr BP). Between 3000 and 100 cal yr BP, wetter conditions were inferred from an increase in herb taxa and a decrease in shrubs, while for the last century a grass steppe with higher amounts of shrubs suggests a decrease in moisture availability. Changes in these vegetation assemblages suggest changes in the precipitation patterns related to the position and strength of the westerlies.
Fil: Bamonte, Florencia Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina
Fil: Mancini, Maria Virginia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina
description Changes in pollen spectra of a sediment core from a wetland in the southern side of Lake San Martin, which is located at 49° 11′ S; 72° 22′ W (near the eastern limit of the Subantarctic Forest–Patagonian Steppe ecotone) reflect variations in the composition of vegetation since the Pleistocene–Holocene transition. Comparison of fossil to modern pollen assemblages allowed us to interpret these palaeoenvironmental changes in terms of moisture availability. Between 11 300 and 9500 cal yr BP, conditions with low moisture availability from Poaceae–Ephedra–Chenopodiaceae pollen assemblage were inferred. From 9500 to 8000 cal yr BP, the grass steppe dominance was interpreted as an increase in moisture availability. The steppe assemblage was replaced by shrub taxa suggesting drier conditions in the mid-Holocene (8000–3000 cal yr BP). Between 3000 and 100 cal yr BP, wetter conditions were inferred from an increase in herb taxa and a decrease in shrubs, while for the last century a grass steppe with higher amounts of shrubs suggests a decrease in moisture availability. Changes in these vegetation assemblages suggest changes in the precipitation patterns related to the position and strength of the westerlies.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
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/11336/245611
Bamonte, Florencia Paula; Mancini, Maria Virginia; Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina); Elsevier Science; Review of Palaeobotany and Palynology; 165; 1-2; 5-2011; 103-110
0034-6667
CONICET Digital
CONICET
url http://hdl.handle.net/11336/245611
identifier_str_mv Bamonte, Florencia Paula; Mancini, Maria Virginia; Palaeoenvironmental changes since Pleistocene–Holocene transition: Pollen analysis from a wetland in southwestern Patagonia (Argentina); Elsevier Science; Review of Palaeobotany and Palynology; 165; 1-2; 5-2011; 103-110
0034-6667
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666711000261
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2011.02.003
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
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv 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 13.22299

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