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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paper:paper_00188158_v694_n1_p235_Mercau2023-06-08T14:39:55Z Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America Ramon Mercau, Maria Josefina Laprida, Cecilia Maidana, Nora Irene 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v694_n1_p235_Mercau 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 Ramon Mercau, Maria Josefina Laprida, Cecilia Maidana, Nora Irene 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. |
| author |
Ramon Mercau, Maria Josefina Laprida, Cecilia Maidana, Nora Irene |
| author_facet |
Ramon Mercau, Maria Josefina Laprida, Cecilia Maidana, Nora Irene |
| author_sort |
Ramon Mercau, Maria Josefina |
| 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 |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v694_n1_p235_Mercau http://hdl.handle.net/20.500.12110/paper_00188158_v694_n1_p235_Mercau |
| work_keys_str_mv |
AT ramonmercaumariajosefina patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica AT lapridacecilia patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica AT maidananorairene patagonianostracodsasindicatorsofclimaterelatedhydrologicalvariablesimplicationsforpaleoenvironmentalreconstructionsinsouthernsouthamerica |
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