Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis...
- Autores
- Vilanova, Isabel; Prieto, Aldo Raul; Stutz, Silvina Maria; Bettis, E. Arthur
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Here we present palynological records from alluvial deposits in four outcrop sequences along the lower reaches of Arroyo Claromecó, Buenos Aires Province, Argentina (38° 50' S latitude, 60° 05' W longitude). These data indicate development of soils and grasslands with associated halophytic vegetation in the higher elevations of the floodplains between ca. 7200 and 600014C yr BP (ca. 8000 and 7000cal yr BP). At lower elevations halophytic saltmarsh vegetation was replaced by wetland communities (sedges) in response to a sea-level highstand at 650014C yr BP (ca.7400cal yr BP). Soils were buried by expanding wetlands at ca.600014C yr BP, a trend that persisted until ca. 340014C yr BP (ca. 3700cal yr BP). Over this interval we observe repeated fluctuations between grassland and halophytic vegetation in response to variations in water level and physical-chemical conditions resulting from desiccation or flooding events. These variations are caused by hydrologic variability in a subhumid-dry climatic mean state. Channel incision occurred between ca. 3400 and 250014C yr BP (ca.3700-3200cal yr BP), concurrent with sporadic and intermittent sediment deposition at higher elevations of the floodplain. The pollen record from the paleochannel infilling indicate grasses accompanied by halophytic taxa between ca. 2500 and 80014C yr BP (3200 and 700cal yr BP) deposited in a shallow brackish-to-fresh water body. The palynological spectra from sediments deposited sporadically at higher elevations show halophytic vegetation and a trend toward wetland desiccation followed by development of psammophytic communities after ca. 110014C yr BP. The tops of the alluvial sequences are covered by sand dunes whose modern spectra are characterized by psammophytic vegetation along with exotic tree taxa. Our results and inferences are consistent with previous studies and provide more detailed insights into the impacts of Holocene sea-level and climatic variations, aspects that are relevant for the coastal Pampa grasslands under various scenarios in a warming world.
Fil: Vilanova, Isabel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Prieto, Aldo Raul. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Stutz, Silvina Maria. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bettis, E. Arthur. University of Iowa; Estados Unidos - Materia
-
Climatic Variability
Coastal Pampa Grasslands
Holocene
Palynology
Sea-Level - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/69110
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Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo ClaromecóVilanova, IsabelPrieto, Aldo RaulStutz, Silvina MariaBettis, E. ArthurClimatic VariabilityCoastal Pampa GrasslandsHolocenePalynologySea-Levelhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Here we present palynological records from alluvial deposits in four outcrop sequences along the lower reaches of Arroyo Claromecó, Buenos Aires Province, Argentina (38° 50' S latitude, 60° 05' W longitude). These data indicate development of soils and grasslands with associated halophytic vegetation in the higher elevations of the floodplains between ca. 7200 and 600014C yr BP (ca. 8000 and 7000cal yr BP). At lower elevations halophytic saltmarsh vegetation was replaced by wetland communities (sedges) in response to a sea-level highstand at 650014C yr BP (ca.7400cal yr BP). Soils were buried by expanding wetlands at ca.600014C yr BP, a trend that persisted until ca. 340014C yr BP (ca. 3700cal yr BP). Over this interval we observe repeated fluctuations between grassland and halophytic vegetation in response to variations in water level and physical-chemical conditions resulting from desiccation or flooding events. These variations are caused by hydrologic variability in a subhumid-dry climatic mean state. Channel incision occurred between ca. 3400 and 250014C yr BP (ca.3700-3200cal yr BP), concurrent with sporadic and intermittent sediment deposition at higher elevations of the floodplain. The pollen record from the paleochannel infilling indicate grasses accompanied by halophytic taxa between ca. 2500 and 80014C yr BP (3200 and 700cal yr BP) deposited in a shallow brackish-to-fresh water body. The palynological spectra from sediments deposited sporadically at higher elevations show halophytic vegetation and a trend toward wetland desiccation followed by development of psammophytic communities after ca. 110014C yr BP. The tops of the alluvial sequences are covered by sand dunes whose modern spectra are characterized by psammophytic vegetation along with exotic tree taxa. Our results and inferences are consistent with previous studies and provide more detailed insights into the impacts of Holocene sea-level and climatic variations, aspects that are relevant for the coastal Pampa grasslands under various scenarios in a warming world.Fil: Vilanova, Isabel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Prieto, Aldo Raul. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Stutz, Silvina Maria. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bettis, E. Arthur. University of Iowa; Estados UnidosElsevier Science2010-12info: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/11336/69110Vilanova, Isabel; Prieto, Aldo Raul; Stutz, Silvina Maria; Bettis, E. Arthur; Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 298; 3-4; 12-2010; 210-2230031-0182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2010.09.026info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018210005961info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:52:30Zoai:ri.conicet.gov.ar:11336/69110instacron: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 09:52:30.401CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
title |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
spellingShingle |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó Vilanova, Isabel Climatic Variability Coastal Pampa Grasslands Holocene Palynology Sea-Level |
title_short |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
title_full |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
title_fullStr |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
title_full_unstemmed |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
title_sort |
Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó |
dc.creator.none.fl_str_mv |
Vilanova, Isabel Prieto, Aldo Raul Stutz, Silvina Maria Bettis, E. Arthur |
author |
Vilanova, Isabel |
author_facet |
Vilanova, Isabel Prieto, Aldo Raul Stutz, Silvina Maria Bettis, E. Arthur |
author_role |
author |
author2 |
Prieto, Aldo Raul Stutz, Silvina Maria Bettis, E. Arthur |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Climatic Variability Coastal Pampa Grasslands Holocene Palynology Sea-Level |
topic |
Climatic Variability Coastal Pampa Grasslands Holocene Palynology Sea-Level |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Here we present palynological records from alluvial deposits in four outcrop sequences along the lower reaches of Arroyo Claromecó, Buenos Aires Province, Argentina (38° 50' S latitude, 60° 05' W longitude). These data indicate development of soils and grasslands with associated halophytic vegetation in the higher elevations of the floodplains between ca. 7200 and 600014C yr BP (ca. 8000 and 7000cal yr BP). At lower elevations halophytic saltmarsh vegetation was replaced by wetland communities (sedges) in response to a sea-level highstand at 650014C yr BP (ca.7400cal yr BP). Soils were buried by expanding wetlands at ca.600014C yr BP, a trend that persisted until ca. 340014C yr BP (ca. 3700cal yr BP). Over this interval we observe repeated fluctuations between grassland and halophytic vegetation in response to variations in water level and physical-chemical conditions resulting from desiccation or flooding events. These variations are caused by hydrologic variability in a subhumid-dry climatic mean state. Channel incision occurred between ca. 3400 and 250014C yr BP (ca.3700-3200cal yr BP), concurrent with sporadic and intermittent sediment deposition at higher elevations of the floodplain. The pollen record from the paleochannel infilling indicate grasses accompanied by halophytic taxa between ca. 2500 and 80014C yr BP (3200 and 700cal yr BP) deposited in a shallow brackish-to-fresh water body. The palynological spectra from sediments deposited sporadically at higher elevations show halophytic vegetation and a trend toward wetland desiccation followed by development of psammophytic communities after ca. 110014C yr BP. The tops of the alluvial sequences are covered by sand dunes whose modern spectra are characterized by psammophytic vegetation along with exotic tree taxa. Our results and inferences are consistent with previous studies and provide more detailed insights into the impacts of Holocene sea-level and climatic variations, aspects that are relevant for the coastal Pampa grasslands under various scenarios in a warming world. Fil: Vilanova, Isabel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Prieto, Aldo Raul. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Stutz, Silvina Maria. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Paleoecología y Palinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Bettis, E. Arthur. University of Iowa; Estados Unidos |
description |
Here we present palynological records from alluvial deposits in four outcrop sequences along the lower reaches of Arroyo Claromecó, Buenos Aires Province, Argentina (38° 50' S latitude, 60° 05' W longitude). These data indicate development of soils and grasslands with associated halophytic vegetation in the higher elevations of the floodplains between ca. 7200 and 600014C yr BP (ca. 8000 and 7000cal yr BP). At lower elevations halophytic saltmarsh vegetation was replaced by wetland communities (sedges) in response to a sea-level highstand at 650014C yr BP (ca.7400cal yr BP). Soils were buried by expanding wetlands at ca.600014C yr BP, a trend that persisted until ca. 340014C yr BP (ca. 3700cal yr BP). Over this interval we observe repeated fluctuations between grassland and halophytic vegetation in response to variations in water level and physical-chemical conditions resulting from desiccation or flooding events. These variations are caused by hydrologic variability in a subhumid-dry climatic mean state. Channel incision occurred between ca. 3400 and 250014C yr BP (ca.3700-3200cal yr BP), concurrent with sporadic and intermittent sediment deposition at higher elevations of the floodplain. The pollen record from the paleochannel infilling indicate grasses accompanied by halophytic taxa between ca. 2500 and 80014C yr BP (3200 and 700cal yr BP) deposited in a shallow brackish-to-fresh water body. The palynological spectra from sediments deposited sporadically at higher elevations show halophytic vegetation and a trend toward wetland desiccation followed by development of psammophytic communities after ca. 110014C yr BP. The tops of the alluvial sequences are covered by sand dunes whose modern spectra are characterized by psammophytic vegetation along with exotic tree taxa. Our results and inferences are consistent with previous studies and provide more detailed insights into the impacts of Holocene sea-level and climatic variations, aspects that are relevant for the coastal Pampa grasslands under various scenarios in a warming world. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-12 |
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/11336/69110 Vilanova, Isabel; Prieto, Aldo Raul; Stutz, Silvina Maria; Bettis, E. Arthur; Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 298; 3-4; 12-2010; 210-223 0031-0182 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/69110 |
identifier_str_mv |
Vilanova, Isabel; Prieto, Aldo Raul; Stutz, Silvina Maria; Bettis, E. Arthur; Holocene vegetation changes along the southeastern coast of the Argentinean Pampa grasslands in relation to sea-level fluctuations and climatic variability: Palynological analysis of alluvial sequences from Arroyo Claromecó; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 298; 3-4; 12-2010; 210-223 0031-0182 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.palaeo.2010.09.026 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018210005961 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf 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 |
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CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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1844613610038362112 |
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13.070432 |