Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus

The paleoenvironmental evolution of Laguna de Chascomus during the last 500 years is reconstructed based on ostracod assemblages and sed-imentological and geochemical analyses from sediment cores. The chronology is constrained by one AMS 14C date on terrestrial material. The main hydrological and ec...

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Autores principales:	Lapridai, C., Valero-garcés, B.
Formato:	JOUR
Materias:	Chascomus Historical records Ostracods Paleohydrology Pampa biodiversity environmental change evolutionary biology historical record hydrological response lake ecosystem ostracod paleoenvironment paleohydrology sediment core species diversity water availability Argentina Pampas South America Cyprideis Limnocythere Ostracoda
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027014_v46_n1_p95_Lapridai
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027014_v46_n1_p95_Lapridai
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spelling	todo:paper_00027014_v46_n1_p95_Lapridai2023-10-03T13:53:05Z Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus Lapridai, C. Valero-garcés, B. Chascomus Historical records Ostracods Paleohydrology Pampa biodiversity environmental change evolutionary biology historical record hydrological response lake ecosystem ostracod paleoenvironment paleohydrology sediment core species diversity water availability Argentina Pampas South America Cyprideis Limnocythere Ostracoda The paleoenvironmental evolution of Laguna de Chascomus during the last 500 years is reconstructed based on ostracod assemblages and sed-imentological and geochemical analyses from sediment cores. The chronology is constrained by one AMS 14C date on terrestrial material. The main hydrological and ecological characteristics of the lake are climatically- controlled. Three main expansion - contraction lake cycles have occurred during the last 500 years under different hydrological conditions. During periods of relatively higher water availability (end of 15 th century - mid 17 th century) lake waters were S-oligohaline and HCO 3" dominated; Limnocythere aff. L. sp. staplini was the dominant ostracod species and biodiversity was moderate. During periods of lower water availability (beginning of 18th century till mid 19th century, including the Little Ice Age), lake waters were a-oligo to mesohaline, with higher salinities and C1">HCO 3". Cyprideis hartmanni was dominant, and the ostracod assemblages have lower diversity. The paleohydrological evolution is compared to the available historical documents. A hydro-ecological conceptual model based on hydrochemistry, hydrology and ostracod assemblages is proposed to explain the evolution of the lake. © Asociación Paleontológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v46_n1_p95_Lapridai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Chascomus Historical records Ostracods Paleohydrology Pampa biodiversity environmental change evolutionary biology historical record hydrological response lake ecosystem ostracod paleoenvironment paleohydrology sediment core species diversity water availability Argentina Pampas South America Cyprideis Limnocythere Ostracoda
spellingShingle	Chascomus Historical records Ostracods Paleohydrology Pampa biodiversity environmental change evolutionary biology historical record hydrological response lake ecosystem ostracod paleoenvironment paleohydrology sediment core species diversity water availability Argentina Pampas South America Cyprideis Limnocythere Ostracoda Lapridai, C. Valero-garcés, B. Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
topic_facet	Chascomus Historical records Ostracods Paleohydrology Pampa biodiversity environmental change evolutionary biology historical record hydrological response lake ecosystem ostracod paleoenvironment paleohydrology sediment core species diversity water availability Argentina Pampas South America Cyprideis Limnocythere Ostracoda
description	The paleoenvironmental evolution of Laguna de Chascomus during the last 500 years is reconstructed based on ostracod assemblages and sed-imentological and geochemical analyses from sediment cores. The chronology is constrained by one AMS 14C date on terrestrial material. The main hydrological and ecological characteristics of the lake are climatically- controlled. Three main expansion - contraction lake cycles have occurred during the last 500 years under different hydrological conditions. During periods of relatively higher water availability (end of 15 th century - mid 17 th century) lake waters were S-oligohaline and HCO 3" dominated; Limnocythere aff. L. sp. staplini was the dominant ostracod species and biodiversity was moderate. During periods of lower water availability (beginning of 18th century till mid 19th century, including the Little Ice Age), lake waters were a-oligo to mesohaline, with higher salinities and C1">HCO 3". Cyprideis hartmanni was dominant, and the ostracod assemblages have lower diversity. The paleohydrological evolution is compared to the available historical documents. A hydro-ecological conceptual model based on hydrochemistry, hydrology and ostracod assemblages is proposed to explain the evolution of the lake. © Asociación Paleontológica Argentina.
format	JOUR
author	Lapridai, C. Valero-garcés, B.
author_facet	Lapridai, C. Valero-garcés, B.
author_sort	Lapridai, C.
title	Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
title_short	Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
title_full	Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
title_fullStr	Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
title_full_unstemmed	Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus
title_sort	environmental changes in the buenos aires pampa region during historical times based on ostracods : the hydrological evolution of the laguna chascomus
url	http://hdl.handle.net/20.500.12110/paper_00027014_v46_n1_p95_Lapridai
work_keys_str_mv	AT lapridaic environmentalchangesinthebuenosairespamparegionduringhistoricaltimesbasedonostracodsthehydrologicalevolutionofthelagunachascomus AT valerogarcesb environmentalchangesinthebuenosairespamparegionduringhistoricaltimesbasedonostracodsthehydrologicalevolutionofthelagunachascomus
_version_	1807315987271254016

Environmental changes in the buenos aires pampa region during historical times based on ostracods : The hydrological evolution of the laguna chascomus

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