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Abstract:

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.

Registro:

Documento: Artículo
Título:Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America
Autor:Mercau, J.R.; Laprida, C.; Massaferro, J.; Rogora, M.; Tartari, G.; Maidana, N.I.
Filiación:Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes 2160,Ciudad Universitaria-Pabellon II, C1428EGA Buenos Aires, Argentina
CENAC (Centro de Estudios Nacionales Aplicados a la Conservación), Administración de Parques Nacionales, Av. Gral. San Martín 24, R8400ALN San Carlos de Bariloche, Río Negro, Argentina
CNR Institute of Ecosystem Study, Largo Tonolli 50, 28922 Verbania Pallanza, Italy
Departamento de Biodiversidad y Biologia Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes 2160,Ciudad Universitaria-Pabellon II, C1428EGA Buenos Aires, Argentina
Palabras clave:Ecology; Freshwater Ostracoda; Hydrochemistry; Patagonia; anion; bioindicator; environmental gradient; hydrochemistry; hydrological cycle; ostracod; paleoenvironment; paleohydrology; precipitation (climatology); reconstruction; sodium; solute; Patagonia; Limnocythere; Ostracoda
Año:2012
Volumen:694
Número:1
Página de inicio:235
Página de fin:251
DOI: http://dx.doi.org/10.1007/s10750-012-1192-z
Título revista:Hydrobiologia
Título revista abreviado:Hydrobiologia
ISSN:00188158
CODEN:HYDRB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v694_n1_p235_Mercau

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Citas:

---------- APA ----------
Mercau, J.R., Laprida, C., Massaferro, J., Rogora, M., Tartari, G. & Maidana, N.I. (2012) . Patagonian ostracods as indicators of climate-related hydrological variables: Implications for paleoenvironmental reconstructions in Southern South America. Hydrobiologia, 694(1), 235-251.
http://dx.doi.org/10.1007/s10750-012-1192-z
---------- CHICAGO ----------
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" . Hydrobiologia 694, no. 1 (2012) : 235-251.
http://dx.doi.org/10.1007/s10750-012-1192-z
---------- MLA ----------
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" . Hydrobiologia, vol. 694, no. 1, 2012, pp. 235-251.
http://dx.doi.org/10.1007/s10750-012-1192-z
---------- VANCOUVER ----------
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. Hydrobiologia. 2012;694(1):235-251.
http://dx.doi.org/10.1007/s10750-012-1192-z