Heterogeneity of fresh-water Patagonian ecosystems

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The wide diversity of Patagonian freshwater ecosystems may be classified into three groups: glacial Andean lakes, Extra-andine closed depressions, and rivers and man-made lakes. We here analysed the biotic structure of Patagonian lentic and lotic ecosystems. We focus on the effect of both abiotic (c...

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Autores principales: Modenutti, Beatriz E., Balseiro, Esteban, Diéguez, María del Carmen, Queimaliños, Claudia, Albariño, Ricardo
Lenguaje:Inglés
Publicado: 1998
Acceso en línea:https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:ecologiaaustral_v008_n02_p1552023-10-03T13:33:11Z Heterogeneity of fresh-water Patagonian ecosystems Modenutti, Beatriz E. Balseiro, Esteban Diéguez, María del Carmen Queimaliños, Claudia Albariño, Ricardo The wide diversity of Patagonian freshwater ecosystems may be classified into three groups: glacial Andean lakes, Extra-andine closed depressions, and rivers and man-made lakes. We here analysed the biotic structure of Patagonian lentic and lotic ecosystems. We focus on the effect of both abiotic (climate, water composition, etc.) and biotic factors (competition, predation) on species diversity and composition of these communities. Zooplankton (rotifers and copepods) and macrobenthic insects (Plecoptera) were chosen as examples of the distribution patterns observed in lakes and rivers respectively. Rotifer species richness was explained by altitude, while species composition was related with conductivity. Three different rotifer assemblages were identified and associated with particular ranges of conductivity. In addition, the distribution of two rotifer genera, Keratella and Asplanchna, was related with biotic interactions (competition and predation). Crustacean size spectrum depended on visual fish predation. Plecoptera species richness decreased as a function of the stream order. Low stream order covered by Nothofagus forest showed the highest species number. 1998-12 PDF Inglés info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv Inglés
description The wide diversity of Patagonian freshwater ecosystems may be classified into three groups: glacial Andean lakes, Extra-andine closed depressions, and rivers and man-made lakes. We here analysed the biotic structure of Patagonian lentic and lotic ecosystems. We focus on the effect of both abiotic (climate, water composition, etc.) and biotic factors (competition, predation) on species diversity and composition of these communities. Zooplankton (rotifers and copepods) and macrobenthic insects (Plecoptera) were chosen as examples of the distribution patterns observed in lakes and rivers respectively. Rotifer species richness was explained by altitude, while species composition was related with conductivity. Three different rotifer assemblages were identified and associated with particular ranges of conductivity. In addition, the distribution of two rotifer genera, Keratella and Asplanchna, was related with biotic interactions (competition and predation). Crustacean size spectrum depended on visual fish predation. Plecoptera species richness decreased as a function of the stream order. Low stream order covered by Nothofagus forest showed the highest species number.
author Modenutti, Beatriz E.
Balseiro, Esteban
Diéguez, María del Carmen
Queimaliños, Claudia
Albariño, Ricardo
spellingShingle Modenutti, Beatriz E.
Balseiro, Esteban
Diéguez, María del Carmen
Queimaliños, Claudia
Albariño, Ricardo
Heterogeneity of fresh-water Patagonian ecosystems
author_facet Modenutti, Beatriz E.
Balseiro, Esteban
Diéguez, María del Carmen
Queimaliños, Claudia
Albariño, Ricardo
author_sort Modenutti, Beatriz E.
title Heterogeneity of fresh-water Patagonian ecosystems
title_short Heterogeneity of fresh-water Patagonian ecosystems
title_full Heterogeneity of fresh-water Patagonian ecosystems
title_fullStr Heterogeneity of fresh-water Patagonian ecosystems
title_full_unstemmed Heterogeneity of fresh-water Patagonian ecosystems
title_sort heterogeneity of fresh-water patagonian ecosystems
publishDate 1998
url https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155
work_keys_str_mv AT modenuttibeatrize heterogeneityoffreshwaterpatagonianecosystems
AT balseiroesteban heterogeneityoffreshwaterpatagonianecosystems
AT dieguezmariadelcarmen heterogeneityoffreshwaterpatagonianecosystems
AT queimalinosclaudia heterogeneityoffreshwaterpatagonianecosystems
AT albarinoricardo heterogeneityoffreshwaterpatagonianecosystems
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