Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia

Southern Patagonia intersects the core of the Southern Westerlies, providing a unique opportunity for palaeo-reconstructions and the implication of past wind variations. There is a strong link between the strength of the westerlies and precipitation, which impacts vegetation communities. The palaeoe...

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Autores: Echeverria, Marcos Emanuel, Sottile, Gonzalo David, Mancini, Maria Virginia, Fontana, Sonia Leonor
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/45679
Acceso en línea:http://hdl.handle.net/11336/45679
Access Level:acceso abierto
Palabra clave:Fire Regime
Mid- Late Holocene
Nothofagus
Palaeoenvironmental Reconstruction
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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spelling Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest PatagoniaEcheverria, Marcos EmanuelSottile, Gonzalo DavidMancini, Maria VirginiaFontana, Sonia LeonorFire RegimeMid- Late HoloceneNothofagusPalaeoenvironmental Reconstructionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Southern Patagonia intersects the core of the Southern Westerlies, providing a unique opportunity for palaeo-reconstructions and the implication of past wind variations. There is a strong link between the strength of the westerlies and precipitation, which impacts vegetation communities. The palaeoenvironmental changes that occurred since the middle Holocene to present days are reconstructed from a peat record recovered in Peninsula Avellaneda (50°15′57″S; 72°50′33″W). Interpretations are based on pollen, charcoal and sediment analyses. Closed Nothofagus forest together with low fire activity characterized the region during the period c. 5500–3500 cal. yr BP, related to an increased in precipitation through an intensification of the westerlies. After 3500 cal. yr BP, shrub and grass communities became dominant at the expense of Nothofagus forest, suggesting a climatic shift to dry conditions, as a result of weaker westerlies. This patchy forest-steppe vegetation has favoured the occurrence of fire events. Subsequently, Nothofagus forest recovered for a short period between 2000 and 400 cal. yr BP. Then, major vegetation changes took place with the re-establishment of an open landscape. The calculated moisture balance index allowed us to hypothesize about the relationship between westerlies fluctuation and El Niño Southern Oscillation (ENSO) anomalies during the mid and late Holocene.Fil: Echeverria, Marcos Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; ArgentinaFil: Sottile, Gonzalo David. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; ArgentinaFil: Mancini, Maria Virginia. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fontana, Sonia Leonor. University Of Göttingen; AlemaniaSage Publications Ltd2014-06info: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/11336/45679Echeverria, Marcos Emanuel; Sottile, Gonzalo David; Mancini, Maria Virginia; Fontana, Sonia Leonor; Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia; Sage Publications Ltd; Holocene (Seven Oaks); 24; 8; 6-2014; 957-9690959-6836CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1177/0959683614534742info:eu-repo/semantics/altIdentifier/url/http://journals.sagepub.com/doi/10.1177/0959683614534742info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:19:49Zoai:ri.conicet.gov.ar:11336/45679instacron: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:34982024-05-08 14:19:49.569CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
title Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
spellingShingle Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
Echeverria, Marcos Emanuel
Fire Regime
Mid- Late Holocene
Nothofagus
Palaeoenvironmental Reconstruction
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
title_full Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
title_fullStr Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
title_full_unstemmed Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
title_sort Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia
dc.creator.none.fl_str_mv Echeverria, Marcos Emanuel
Sottile, Gonzalo David
Mancini, Maria Virginia
Fontana, Sonia Leonor
author Echeverria, Marcos Emanuel
author_facet Echeverria, Marcos Emanuel
Sottile, Gonzalo David
Mancini, Maria Virginia
Fontana, Sonia Leonor
author_role author
author2 Sottile, Gonzalo David
Mancini, Maria Virginia
Fontana, Sonia Leonor
author2_role author
author
author
dc.subject.none.fl_str_mv Fire Regime
Mid- Late Holocene
Nothofagus
Palaeoenvironmental Reconstruction
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Fire Regime
Mid- Late Holocene
Nothofagus
Palaeoenvironmental Reconstruction
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Southern Patagonia intersects the core of the Southern Westerlies, providing a unique opportunity for palaeo-reconstructions and the implication of past wind variations. There is a strong link between the strength of the westerlies and precipitation, which impacts vegetation communities. The palaeoenvironmental changes that occurred since the middle Holocene to present days are reconstructed from a peat record recovered in Peninsula Avellaneda (50°15′57″S; 72°50′33″W). Interpretations are based on pollen, charcoal and sediment analyses. Closed Nothofagus forest together with low fire activity characterized the region during the period c. 5500–3500 cal. yr BP, related to an increased in precipitation through an intensification of the westerlies. After 3500 cal. yr BP, shrub and grass communities became dominant at the expense of Nothofagus forest, suggesting a climatic shift to dry conditions, as a result of weaker westerlies. This patchy forest-steppe vegetation has favoured the occurrence of fire events. Subsequently, Nothofagus forest recovered for a short period between 2000 and 400 cal. yr BP. Then, major vegetation changes took place with the re-establishment of an open landscape. The calculated moisture balance index allowed us to hypothesize about the relationship between westerlies fluctuation and El Niño Southern Oscillation (ENSO) anomalies during the mid and late Holocene.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
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/11336/45679
Echeverria, Marcos Emanuel; Sottile, Gonzalo David; Mancini, Maria Virginia; Fontana, Sonia Leonor; Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia; Sage Publications Ltd; Holocene (Seven Oaks); 24; 8; 6-2014; 957-969
0959-6836
CONICET Digital
CONICET
url http://hdl.handle.net/11336/45679
identifier_str_mv Echeverria, Marcos Emanuel; Sottile, Gonzalo David; Mancini, Maria Virginia; Fontana, Sonia Leonor; Nothofagus forest dynamics and palaeoenvironmental variations during the mid and late Holocene, in southwest Patagonia; Sage Publications Ltd; Holocene (Seven Oaks); 24; 8; 6-2014; 957-969
0959-6836
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683614534742
info:eu-repo/semantics/altIdentifier/url/http://journals.sagepub.com/doi/10.1177/0959683614534742
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 Sage Publications Ltd
publisher.none.fl_str_mv Sage Publications Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,811543

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