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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ftunibueairesbd:todo:ecologiaaustral_v008_n02_p155 2023-10-29T02:40:47+01:00 Heterogeneity of fresh-water Patagonian ecosystems Modenutti, Beatriz E. Balseiro, Esteban Diéguez, María del Carmen Queimaliños, Claudia Albariño, Ricardo 1998-12 PDF https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155 Inglés eng https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar 1998 ftunibueairesbd https://doi.org/20.500.12110/ecologiaaustral_v008_n02_p155 2023-10-05T01:09:30Z 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. Other/Unknown Material Copepods Rotifer Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
English |
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 |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_relation |
https://hdl.handle.net/20.500.12110/ecologiaaustral_v008_n02_p155 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar |
op_doi |
https://doi.org/20.500.12110/ecologiaaustral_v008_n02_p155 |
_version_ |
1781069639180091392 |