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Artículo

Factors that control the seasonal dynamics of the shallow lakes in the Pampean region, Buenos Aires, Argentina

Pisano, Maria FlorenciaIcon ; D'amico, Gabriela MarianaIcon ; Ramos, Nicolás AndrésIcon ; Pommarés, Nicole NadínIcon ; Fucks, Enrique Eduardo
Fecha de publicación: 03/2020
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of South American Earth Sciences
ISSN: 0895-9811
e-ISSN: 1873-0647
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente

Resumen

Shallow lakes are distinctive aquatic ecosystems of the Pampean region. In this paper, climatic, morphometric and chemical-environmental aspects of six lacustrine bodies of the Salado River basin, Buenos Aires, are analyzed. The climatic variability of the region was estimated and linked to the behavior of each water body during the studied period (2017–2018); precipitations displayed deviations from the mean values, with periods of deficit in spring and summer, and excess in autumn. The analysis of satellite images showed a group of lakes with very low variation of the morphometric parameters because they have gates that keep the water level constant. On the contrary, those without anthropic intervention displayed a greater morphometric variability, since the water levels have been directly linked to local weather fluctuations. From a chemical-environmental perspective, changes were observed both at the regional (p = 0.015) and local (p = 0.0014) levels. Differences among sites cannot be characterized by a single variable but by a set of them. The dominant cation in the Pampean shallow lakes is the Na+ coming from the contact of groundwater with loessic sediments. Lakes showed a particular anionic dominance that not following a seasonal but a particular pattern. These are mainly linked to the characteristics of the substrate (presence of marine sediments or gypsum deposits). The great vulnerability of these environments to global and regional climatic changes, anthropic modifications and a large number of shallow lakes in the area, allow finding different scenarios (geomorphological, ecological, hydrogeological, etc.) to assess their vulnerability and predict their behavior against future climate scenarios in an economically important area for Argentine.
Palabras clave: ANTHROPIC INTERVENTION , HYDROCHEMISTRY , MORPHOMETRY , PAMPEAN SHALLOW LAKES , SALADO RIVER
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/133071
URL: https://www.sciencedirect.com/science/article/pii/S0895981119304948
DOI: http://dx.doi.org/10.1016/j.jsames.2019.102468
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Pisano, Maria Florencia; D'amico, Gabriela Mariana; Ramos, Nicolás Andrés; Pommarés, Nicole Nadín; Fucks, Enrique Eduardo; Factors that control the seasonal dynamics of the shallow lakes in the Pampean region, Buenos Aires, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 98; 102468; 3-2020; 1-11
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