Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America

Different precipitation regimes across Patagonia generate an environmental gradient that is expected to reflect upon the solute composition and concentration of lake water through the ensuing differences in water balance. In turn, this hydrochemical gradient could influence the occurrence and distri...

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Autores principales: Mercau, J.R., Laprida, C., Massaferro, J., Rogora, M., Tartari, G., Maidana, N.I.
Formato: JOUR
Materias:
Ecology
Freshwater Ostracoda
Hydrochemistry
Patagonia
anion
bioindicator
environmental gradient
hydrochemistry
hydrological cycle
ostracod
paleoenvironment
paleohydrology
precipitation (climatology)
reconstruction
sodium
solute
Limnocythere
Ostracoda
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00188158_v694_n1_p235_Mercau
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00188158_v694_n1_p235_Mercau
record_format dspace
spelling todo:paper_00188158_v694_n1_p235_Mercau2023-10-03T14:16:06Z Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America Mercau, J.R. Laprida, C. Massaferro, J. Rogora, M. Tartari, G. Maidana, N.I. Ecology Freshwater Ostracoda Hydrochemistry Patagonia anion bioindicator environmental gradient hydrochemistry hydrological cycle ostracod paleoenvironment paleohydrology precipitation (climatology) reconstruction sodium solute Patagonia Limnocythere Ostracoda Different precipitation regimes across Patagonia generate an environmental gradient that is expected to reflect upon the solute composition and concentration of lake water through the ensuing differences in water balance. In turn, this hydrochemical gradient could influence the occurrence and distribution of ostracods in the area. A cluster analysis on hydrochemical data of 36 Southern Patagonian waterbodies shows that low salinity, bicarbonate-dominated waters characterize Andean and ecotonal lakes, located in the wetter part of the precipitation gradient, while their steppe counterparts, which receive a much lower precipitation input, are more saline, enriched in all major anions and sodium-dominated. Kruskal-Wallis tests followed by Mann-Whitney pairwise comparisons show statistically significant differences in the ostracod species each water type hosts, with L. patagonica, E. cecryphalium, P. smaragdina and P. incae being found in the more dilute waters characteristic of Andean and ecotonal lakes and Limnocythere rionegroensis in the mesohaline, evaporatively evolved waters typical of steppe lakes. Other species studied do not appear to have such distinct distributions, having been found throughout the range of conditions studied. These findings promote the use of the aforementioned ostracods as semi-quantitative paleohydrological indicators, which could improve paleoclimatic reconstructions in Patagonia. © 2012 Springer Science+Business Media B.V. Fil:Mercau, J.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Laprida, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maidana, N.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00188158_v694_n1_p235_Mercau
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ecology
Freshwater Ostracoda
Hydrochemistry
Patagonia
anion
bioindicator
environmental gradient
hydrochemistry
hydrological cycle
ostracod
paleoenvironment
paleohydrology
precipitation (climatology)
reconstruction
sodium
solute
Patagonia
Limnocythere
Ostracoda
spellingShingle Ecology
Freshwater Ostracoda
Hydrochemistry
Patagonia
anion
bioindicator
environmental gradient
hydrochemistry
hydrological cycle
ostracod
paleoenvironment
paleohydrology
precipitation (climatology)
reconstruction
sodium
solute
Patagonia
Limnocythere
Ostracoda
Mercau, J.R.
Laprida, C.
Massaferro, J.
Rogora, M.
Tartari, G.
Maidana, N.I.
Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
topic_facet Ecology
Freshwater Ostracoda
Hydrochemistry
Patagonia
anion
bioindicator
environmental gradient
hydrochemistry
hydrological cycle
ostracod
paleoenvironment
paleohydrology
precipitation (climatology)
reconstruction
sodium
solute
Patagonia
Limnocythere
Ostracoda
description Different precipitation regimes across Patagonia generate an environmental gradient that is expected to reflect upon the solute composition and concentration of lake water through the ensuing differences in water balance. In turn, this hydrochemical gradient could influence the occurrence and distribution of ostracods in the area. A cluster analysis on hydrochemical data of 36 Southern Patagonian waterbodies shows that low salinity, bicarbonate-dominated waters characterize Andean and ecotonal lakes, located in the wetter part of the precipitation gradient, while their steppe counterparts, which receive a much lower precipitation input, are more saline, enriched in all major anions and sodium-dominated. Kruskal-Wallis tests followed by Mann-Whitney pairwise comparisons show statistically significant differences in the ostracod species each water type hosts, with L. patagonica, E. cecryphalium, P. smaragdina and P. incae being found in the more dilute waters characteristic of Andean and ecotonal lakes and Limnocythere rionegroensis in the mesohaline, evaporatively evolved waters typical of steppe lakes. Other species studied do not appear to have such distinct distributions, having been found throughout the range of conditions studied. These findings promote the use of the aforementioned ostracods as semi-quantitative paleohydrological indicators, which could improve paleoclimatic reconstructions in Patagonia. © 2012 Springer Science+Business Media B.V.
format JOUR
author Mercau, J.R.
Laprida, C.
Massaferro, J.
Rogora, M.
Tartari, G.
Maidana, N.I.
author_facet Mercau, J.R.
Laprida, C.
Massaferro, J.
Rogora, M.
Tartari, G.
Maidana, N.I.
author_sort Mercau, J.R.
title Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
title_short Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
title_full Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
title_fullStr Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
title_full_unstemmed Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
title_sort patagonian ostracods as indicators of climate-related hydrological variables: implications for paleoenvironmental reconstructions in southern south america
url http://hdl.handle.net/20.500.12110/paper_00188158_v694_n1_p235_Mercau
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AT lapridac patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica
AT massaferroj patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica
AT rogoram patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica
AT tartarig patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica
AT maidanani patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica
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