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

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 mult...

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Autores principales: López Blanco, Charo, Rodríguez Abaunza, Gloria Alejandra, Seitz, Carina, Pérez, Laura, Cuña Rodriguez, Carolina, Fontana, Sonia Leonor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Naturales
Nutrient enrichment
Hydroclimatic reconstruction
Lake level changes
Diatoms
Cladocerans
Ostracods
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134559
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134559
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Nutrient enrichment
Hydroclimatic reconstruction
Lake level changes
Diatoms
Cladocerans
Ostracods
spellingShingle Ciencias Naturales
Nutrient enrichment
Hydroclimatic reconstruction
Lake level changes
Diatoms
Cladocerans
Ostracods
López Blanco, Charo
Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Pérez, Laura
Cuña Rodriguez, Carolina
Fontana, Sonia Leonor
A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
topic_facet Ciencias Naturales
Nutrient enrichment
Hydroclimatic reconstruction
Lake level changes
Diatoms
Cladocerans
Ostracods
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 Olavarria (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.
format Articulo
Articulo
author López Blanco, Charo
Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Pérez, Laura
Cuña Rodriguez, Carolina
Fontana, Sonia Leonor
author_facet López Blanco, Charo
Rodríguez Abaunza, Gloria Alejandra
Seitz, Carina
Pérez, Laura
Cuña Rodriguez, Carolina
Fontana, Sonia Leonor
author_sort López Blanco, Charo
title A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande
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 700-year multiproxy reconstruction on the argentinian pampas inferred from the sediments of laguna blanca grande
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/134559
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