Heterogeneity of fresh-water Patagonian ecosystems
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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Asociación Argentina de Ecología
1998
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ftdoajarticles:oai:doaj.org/article:a4bdde6f7f254f19861e30907d50005d 2023-12-31T10:24:09+01:00 Heterogeneity of fresh-water Patagonian ecosystems Beatriz E. Modenutti Esteban Balseiro María del Carmen Diéguez Claudia Quemaliños Ricardo Albariño 1998-12-01T00:00:00Z https://doaj.org/article/a4bdde6f7f254f19861e30907d50005d EN ES eng spa Asociación Argentina de Ecología https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1617 https://doaj.org/toc/0327-5477 https://doaj.org/toc/1667-782X 0327-5477 1667-782X https://doaj.org/article/a4bdde6f7f254f19861e30907d50005d Ecología Austral, Vol 8, Iss 2 (1998) Environmental sciences GE1-350 Ecology QH540-549.5 article 1998 ftdoajarticles 2023-12-03T01:42:04Z 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. Article in Journal/Newspaper Copepods Rotifer Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English Spanish |
topic |
Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
Environmental sciences GE1-350 Ecology QH540-549.5 Beatriz E. Modenutti Esteban Balseiro María del Carmen Diéguez Claudia Quemaliños Ricardo Albariño Heterogeneity of fresh-water Patagonian ecosystems |
topic_facet |
Environmental sciences GE1-350 Ecology QH540-549.5 |
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. |
format |
Article in Journal/Newspaper |
author |
Beatriz E. Modenutti Esteban Balseiro María del Carmen Diéguez Claudia Quemaliños Ricardo Albariño |
author_facet |
Beatriz E. Modenutti Esteban Balseiro María del Carmen Diéguez Claudia Quemaliños Ricardo Albariño |
author_sort |
Beatriz E. Modenutti |
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 |
publisher |
Asociación Argentina de Ecología |
publishDate |
1998 |
url |
https://doaj.org/article/a4bdde6f7f254f19861e30907d50005d |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Ecología Austral, Vol 8, Iss 2 (1998) |
op_relation |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1617 https://doaj.org/toc/0327-5477 https://doaj.org/toc/1667-782X 0327-5477 1667-782X https://doaj.org/article/a4bdde6f7f254f19861e30907d50005d |
_version_ |
1786836023380017152 |