A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande

Autores
López Blanco, Charo; Rodríguez Abaunza, Gloria Alejandra; Seitz, Carina; Perez, Laura; Cuña Rodriguez, Carolina Celeste; Fontana, Sonia Leonor
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due to the presence of shallow environments in a territory non impacted by humans until the last centuries. In this study, we provide a paleoecological reconstruction for the last ca. 700 years based on a multiproxy lacustrine record from Laguna Blanca Grande, in Olavarría (Buenos Aires, Argentina). Our inferences, which were based on sedimentary properties, diatom, cladoceran and ostracod assemblages, offered interesting information about hydroclimatic variability and nutrient increase. Changes in relative abundances on diatoms, specifically on Aulacoseira granulata and Aulacoseira granulata var. angustissima and fragilariods, were used to infer shifts in nutrient conditions. The remainder proxies together indicated small lake level changes. Reconstructed hydroclimatic conditions in Laguna Blanca Grande are consistent with previous paleoecological inferences indicating a humid phase around ca. AD 1450 and progressive drier conditions ca. AD 1530–1900. A flood gate construction and an increase of nutrients in the lake revealed a higher human pressure due to population increase and land-use changes during the last century. Further studies on taxonomy and autecology of microcrustaceans are needed to effectively unlock the information contained in biological proxies from Sudamerican records.
Fil: López Blanco, Charo. Escuela Politécnica Nacional; Ecuador. Justus Liebig Universitat Giessen; Alemania
Fil: Rodríguez Abaunza, Gloria Alejandra. Universidad Pedagógica y Tecnológica de Colombia; Colombia. Universidad Nacional Autónoma de México; México. Smithsonian Tropical Research Institute; Panamá
Fil: Seitz, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Fil: Perez, Laura. Universidad de la República; Uruguay
Fil: Cuña Rodriguez, Carolina Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Fontana, Sonia Leonor. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. University of Applied Sciences; Alemania
Materia
CLADOCERANS
DIATOMS
HYDROCLIMATIC RECONSTRUCTION
LAKE LEVEL CHANGES
NUTRIENT ENRICHMENT
OSTRACODS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/138001
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca GrandeLópez Blanco, CharoRodríguez Abaunza, Gloria AlejandraSeitz, CarinaPerez, LauraCuña Rodriguez, Carolina CelesteFontana, Sonia LeonorCLADOCERANSDIATOMSHYDROCLIMATIC RECONSTRUCTIONLAKE LEVEL CHANGESNUTRIENT ENRICHMENTOSTRACODShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due to the presence of shallow environments in a territory non impacted by humans until the last centuries. In this study, we provide a paleoecological reconstruction for the last ca. 700 years based on a multiproxy lacustrine record from Laguna Blanca Grande, in Olavarría (Buenos Aires, Argentina). Our inferences, which were based on sedimentary properties, diatom, cladoceran and ostracod assemblages, offered interesting information about hydroclimatic variability and nutrient increase. Changes in relative abundances on diatoms, specifically on Aulacoseira granulata and Aulacoseira granulata var. angustissima and fragilariods, were used to infer shifts in nutrient conditions. The remainder proxies together indicated small lake level changes. Reconstructed hydroclimatic conditions in Laguna Blanca Grande are consistent with previous paleoecological inferences indicating a humid phase around ca. AD 1450 and progressive drier conditions ca. AD 1530–1900. A flood gate construction and an increase of nutrients in the lake revealed a higher human pressure due to population increase and land-use changes during the last century. Further studies on taxonomy and autecology of microcrustaceans are needed to effectively unlock the information contained in biological proxies from Sudamerican records.Fil: López Blanco, Charo. Escuela Politécnica Nacional; Ecuador. Justus Liebig Universitat Giessen; AlemaniaFil: Rodríguez Abaunza, Gloria Alejandra. Universidad Pedagógica y Tecnológica de Colombia; Colombia. Universidad Nacional Autónoma de México; México. Smithsonian Tropical Research Institute; PanamáFil: Seitz, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Perez, Laura. Universidad de la República; UruguayFil: Cuña Rodriguez, Carolina Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Fontana, Sonia Leonor. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. University of Applied Sciences; AlemaniaPergamon-Elsevier Science Ltd2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/138001López Blanco, Charo; Rodríguez Abaunza, Gloria Alejandra; Seitz, Carina; Perez, Laura; Cuña Rodriguez, Carolina Celeste; et al.; A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 105; 1-1-2021; 1-12; 1030000895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981120305435info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2020.103000info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:07Zoai:ri.conicet.gov.ar:11336/138001instacron: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 09:50:07.619CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
title A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
spellingShingle A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
López Blanco, Charo
CLADOCERANS
DIATOMS
HYDROCLIMATIC RECONSTRUCTION
LAKE LEVEL CHANGES
NUTRIENT ENRICHMENT
OSTRACODS
title_short A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
title_full A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
title_fullStr A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
title_full_unstemmed A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
title_sort A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
dc.creator.none.fl_str_mv López Blanco, Charo
Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Perez, Laura
Cuña Rodriguez, Carolina Celeste
Fontana, Sonia Leonor
author López Blanco, Charo
author_facet López Blanco, Charo
Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Perez, Laura
Cuña Rodriguez, Carolina Celeste
Fontana, Sonia Leonor
author_role author
author2 Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Perez, Laura
Cuña Rodriguez, Carolina Celeste
Fontana, Sonia Leonor
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CLADOCERANS
DIATOMS
HYDROCLIMATIC RECONSTRUCTION
LAKE LEVEL CHANGES
NUTRIENT ENRICHMENT
OSTRACODS
topic CLADOCERANS
DIATOMS
HYDROCLIMATIC RECONSTRUCTION
LAKE LEVEL CHANGES
NUTRIENT ENRICHMENT
OSTRACODS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due to the presence of shallow environments in a territory non impacted by humans until the last centuries. In this study, we provide a paleoecological reconstruction for the last ca. 700 years based on a multiproxy lacustrine record from Laguna Blanca Grande, in Olavarría (Buenos Aires, Argentina). Our inferences, which were based on sedimentary properties, diatom, cladoceran and ostracod assemblages, offered interesting information about hydroclimatic variability and nutrient increase. Changes in relative abundances on diatoms, specifically on Aulacoseira granulata and Aulacoseira granulata var. angustissima and fragilariods, were used to infer shifts in nutrient conditions. The remainder proxies together indicated small lake level changes. Reconstructed hydroclimatic conditions in Laguna Blanca Grande are consistent with previous paleoecological inferences indicating a humid phase around ca. AD 1450 and progressive drier conditions ca. AD 1530–1900. A flood gate construction and an increase of nutrients in the lake revealed a higher human pressure due to population increase and land-use changes during the last century. Further studies on taxonomy and autecology of microcrustaceans are needed to effectively unlock the information contained in biological proxies from Sudamerican records.
Fil: López Blanco, Charo. Escuela Politécnica Nacional; Ecuador. Justus Liebig Universitat Giessen; Alemania
Fil: Rodríguez Abaunza, Gloria Alejandra. Universidad Pedagógica y Tecnológica de Colombia; Colombia. Universidad Nacional Autónoma de México; México. Smithsonian Tropical Research Institute; Panamá
Fil: Seitz, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Fil: Perez, Laura. Universidad de la República; Uruguay
Fil: Cuña Rodriguez, Carolina Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Fontana, Sonia Leonor. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. University of Applied Sciences; Alemania
description The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due to the presence of shallow environments in a territory non impacted by humans until the last centuries. In this study, we provide a paleoecological reconstruction for the last ca. 700 years based on a multiproxy lacustrine record from Laguna Blanca Grande, in Olavarría (Buenos Aires, Argentina). Our inferences, which were based on sedimentary properties, diatom, cladoceran and ostracod assemblages, offered interesting information about hydroclimatic variability and nutrient increase. Changes in relative abundances on diatoms, specifically on Aulacoseira granulata and Aulacoseira granulata var. angustissima and fragilariods, were used to infer shifts in nutrient conditions. The remainder proxies together indicated small lake level changes. Reconstructed hydroclimatic conditions in Laguna Blanca Grande are consistent with previous paleoecological inferences indicating a humid phase around ca. AD 1450 and progressive drier conditions ca. AD 1530–1900. A flood gate construction and an increase of nutrients in the lake revealed a higher human pressure due to population increase and land-use changes during the last century. Further studies on taxonomy and autecology of microcrustaceans are needed to effectively unlock the information contained in biological proxies from Sudamerican records.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-01
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/11336/138001
López Blanco, Charo; Rodríguez Abaunza, Gloria Alejandra; Seitz, Carina; Perez, Laura; Cuña Rodriguez, Carolina Celeste; et al.; A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 105; 1-1-2021; 1-12; 103000
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/138001
identifier_str_mv López Blanco, Charo; Rodríguez Abaunza, Gloria Alejandra; Seitz, Carina; Perez, Laura; Cuña Rodriguez, Carolina Celeste; et al.; A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 105; 1-1-2021; 1-12; 103000
0895-9811
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/abs/pii/S0895981120305435
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2020.103000
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
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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