Artículo
Mid-Late Holocene Climate and Trophic States in a Shallow Lake from the Southern Pampa Plain, Argentina
Laprida, Cecilia
; Plastani, María Sofía
; Irurzun, Maria Alicia
; Gogorza, Claudia Susana
; Navas, Ana; Valero Garces, B.; Sinito, Ana Maria
Fecha de publicación:
06/2014
Editorial:
PAGEPress
Revista:
Journal Of Limnology
ISSN:
1129-5767
e-ISSN:
1723-8633
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Changes in trophic status of the shallow Lake La Brava (southeastern Pampa plain of Argentina) are evaluated based on geochemical, biological and sedimentological data. Based on a conceptual framework, we propose that the lake level defines the water column mixing conditions, affecting internal lake processes and determining the transparency of lake water. The shift between alternative states is reconstructed for the last ~4800 years. Four main lake stages has been recognized, although short term shifts characterize all stages. A turbid phytoplankton-dominated state prevailed between ~4700-4500 cal yr BP. Drier conditions and low lake levels pushed the lake to a clear state until 2000 cal yr BP. Afterwards the lake switched back to a turbid state, and these conditions persisted until ~200 cal yr BP. In the last 200 years, the lake switched back and forth between a clear and a turbid state anew, the latter represents the modern conditions of the lake since ~1950 AD. These shifts can be attributed mainly to climatic drivers.
Palabras clave:
Ostracodos
,
Geoquimica
,
Evolucion Ambiental
,
Paleoclima
Archivos asociados
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Colecciones
Articulos(CCT - TANDIL)
Articulos de CTRO CIENTIFICO TECNOLOGICO CONICET - TANDIL
Articulos de CTRO CIENTIFICO TECNOLOGICO CONICET - TANDIL
Articulos(CIFICEN)
Articulos de CENTRO DE INV. EN FISICA E INGENIERIA DEL CENTRO DE LA PCIA. DE BS. AS.
Articulos de CENTRO DE INV. EN FISICA E INGENIERIA DEL CENTRO DE LA PCIA. DE BS. AS.
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Laprida, Cecilia; Plastani, María Sofía; Irurzun, Maria Alicia; Gogorza, Claudia Susana; Navas, Ana; et al.; Mid-Late Holocene Climate and Trophic States in a Shallow Lake from the Southern Pampa Plain, Argentina; PAGEPress; Journal Of Limnology; 73; 2; 6-2014; 325-339
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