Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina
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...
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Istituto italiano di idrobiologia (Pallanza, Italia)
2014
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Online Access: | http://hdl.handle.net/10261/101848 https://doi.org/10.4081/jlimnol.2014.830 |
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ftcsic:oai:digital.csic.es:10261/101848 2024-02-11T10:05:18+01:00 Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina Laprida, Cecilia Plastani, Sofía Irurzun, A. Gogorza, Claudia S. G. Navas Izquierdo, Ana Valero-Garcés, Blas L. Sinito, Ana M. 2014 http://hdl.handle.net/10261/101848 https://doi.org/10.4081/jlimnol.2014.830 unknown Istituto italiano di idrobiologia (Pallanza, Italia) http://dx.doi.org/10.4081/jlimnol.2014.830 doi:10.4081/jlimnol.2014.830 issn: 1129-5767 e-issn: 1723-8633 Laprida C, Plastani MS, Irurzun A, Gogorza Claudia SG, Navas A, Valero-Garcés BL, Sinito AM. Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina. Journal of Limnology 73(2): 123-137 (2014) http://hdl.handle.net/10261/101848 open paleolimnology trophic states southern Pampas Argentina Mid-late Holocene artículo http://purl.org/coar/resource_type/c_6501 2014 ftcsic https://doi.org/10.4081/jlimnol.2014.830 2024-01-16T10:01:05Z 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 have been recognized, although short term shifts characterize all stages. A turbid phytoplankton-dominated state prevailed between ~4700-4500 cal yr before present (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 clear and turbid states. The latter represents the modern conditions of the lake since ~1950 AD. These shifts can be attributed mainly to climatic drivers. We thank to Dr Juan Manuel Lirio and Lic Mario Núñez (Instituto Antártico Argentino) for field support. Nora Irene Maidana (Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina) help with diatom identification. Financial support was provided by PIP-CONICET 1265/08, PIP-CONICET 2142001100 100014, UBACyT 20020110100153 and CICYT project EROMED (CGL2011-25486). We thank the editor and two anonymous reviewers for their constructive comments, which helped us to improve the manuscript. This is the IDEAN contribution number R-112. Peer Reviewed Article in Journal/Newspaper Instituto Antártico Argentino Digital.CSIC (Spanish National Research Council) Argentina Argentino Low Lake ENVELOPE(142.677,142.677,-66.993,-66.993) Núñez ENVELOPE(-64.250,-64.250,-65.550,-65.550) Pampa ENVELOPE(-57.216,-57.216,-63.883,-63.883) Journal of Limnology 73 2 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
paleolimnology trophic states southern Pampas Argentina Mid-late Holocene |
spellingShingle |
paleolimnology trophic states southern Pampas Argentina Mid-late Holocene Laprida, Cecilia Plastani, Sofía Irurzun, A. Gogorza, Claudia S. G. Navas Izquierdo, Ana Valero-Garcés, Blas L. Sinito, Ana M. Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
topic_facet |
paleolimnology trophic states southern Pampas Argentina Mid-late Holocene |
description |
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 have been recognized, although short term shifts characterize all stages. A turbid phytoplankton-dominated state prevailed between ~4700-4500 cal yr before present (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 clear and turbid states. The latter represents the modern conditions of the lake since ~1950 AD. These shifts can be attributed mainly to climatic drivers. We thank to Dr Juan Manuel Lirio and Lic Mario Núñez (Instituto Antártico Argentino) for field support. Nora Irene Maidana (Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina) help with diatom identification. Financial support was provided by PIP-CONICET 1265/08, PIP-CONICET 2142001100 100014, UBACyT 20020110100153 and CICYT project EROMED (CGL2011-25486). We thank the editor and two anonymous reviewers for their constructive comments, which helped us to improve the manuscript. This is the IDEAN contribution number R-112. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Laprida, Cecilia Plastani, Sofía Irurzun, A. Gogorza, Claudia S. G. Navas Izquierdo, Ana Valero-Garcés, Blas L. Sinito, Ana M. |
author_facet |
Laprida, Cecilia Plastani, Sofía Irurzun, A. Gogorza, Claudia S. G. Navas Izquierdo, Ana Valero-Garcés, Blas L. Sinito, Ana M. |
author_sort |
Laprida, Cecilia |
title |
Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
title_short |
Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
title_full |
Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
title_fullStr |
Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
title_full_unstemmed |
Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina |
title_sort |
mid-late holocene lake levels and trophic states of a shallow lake from the southern pampa plain, argentina |
publisher |
Istituto italiano di idrobiologia (Pallanza, Italia) |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/101848 https://doi.org/10.4081/jlimnol.2014.830 |
long_lat |
ENVELOPE(142.677,142.677,-66.993,-66.993) ENVELOPE(-64.250,-64.250,-65.550,-65.550) ENVELOPE(-57.216,-57.216,-63.883,-63.883) |
geographic |
Argentina Argentino Low Lake Núñez Pampa |
geographic_facet |
Argentina Argentino Low Lake Núñez Pampa |
genre |
Instituto Antártico Argentino |
genre_facet |
Instituto Antártico Argentino |
op_relation |
http://dx.doi.org/10.4081/jlimnol.2014.830 doi:10.4081/jlimnol.2014.830 issn: 1129-5767 e-issn: 1723-8633 Laprida C, Plastani MS, Irurzun A, Gogorza Claudia SG, Navas A, Valero-Garcés BL, Sinito AM. Mid-late Holocene lake levels and trophic states of a shallow lake from the southern Pampa plain, Argentina. Journal of Limnology 73(2): 123-137 (2014) http://hdl.handle.net/10261/101848 |
op_rights |
open |
op_doi |
https://doi.org/10.4081/jlimnol.2014.830 |
container_title |
Journal of Limnology |
container_volume |
73 |
container_issue |
2 |
_version_ |
1790602231503912960 |