Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)

Seven sites were examined in the Challhuaco-Ñireco system, located in the reserve of the Nahuel Huapi National Park, however part of the catchment is urbanized, being San Carlos de Bariloche (150,000 inhabitants) placed in the lower part of the basin. Physico-chemical variables were measured and ben...

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Autores principales: Mauad, Melina, Miserendino, María Laura, Risso, Miguel Atilio, Massaferro, Julieta
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Zoología
Biotic indexes
Macroinvertebrates
Patagonian
Rivers
Water quality
Ríos
Macroinvertebrados
Índices bióticos
Calidad de agua
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86698
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86698
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Biotic indexes
Macroinvertebrates
Patagonian
Rivers
Water quality
Ríos
Macroinvertebrados
Índices bióticos
Calidad de agua
spellingShingle Zoología
Biotic indexes
Macroinvertebrates
Patagonian
Rivers
Water quality
Ríos
Macroinvertebrados
Índices bióticos
Calidad de agua
Mauad, Melina
Miserendino, María Laura
Risso, Miguel Atilio
Massaferro, Julieta
Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
topic_facet Zoología
Biotic indexes
Macroinvertebrates
Patagonian
Rivers
Water quality
Ríos
Macroinvertebrados
Índices bióticos
Calidad de agua
description Seven sites were examined in the Challhuaco-Ñireco system, located in the reserve of the Nahuel Huapi National Park, however part of the catchment is urbanized, being San Carlos de Bariloche (150,000 inhabitants) placed in the lower part of the basin. Physico-chemical variables were measured and benthic macroinvertebrates were collected during three consecutive years at seven sites from the headwater to the river outlet. Sites near the source of the river were characterised by Plecoptera, Ephemeroptera, Trichoptera and Diptera, whereas sites close to the river mouth were dominated by Diptera, Oligochaeta and Mollusca. Regarding functional feeding groups, collector-gatherers were dominant at all sites and this pattern was consistent among years. Ordination Analysis (RDA) revealed that species assemblages distribution responded to the climatic and topographic gradient (temperature and elevation), but also were associated with variables related to human impact (conductivity, nitrate and phosphate contents). Species assemblages at headwaters were mostly represented by sensitive insects, whereas tolerant taxa such as Tubificidae, Lumbriculidae, Chironomidae and crustacean Aegla sp. were dominant at urbanised sites. Regarding macroinvertebrate metrics employed, total richness, EPT taxa, Shannon diversity index and Biotic Monitoring Patagonian Stream index resulted fairly consistent and evidenced different levels of disturbances at the stream, meaning that this measures are suitable for evaluation of the status of Patagonian mountain streams.
format Articulo
Articulo
author Mauad, Melina
Miserendino, María Laura
Risso, Miguel Atilio
Massaferro, Julieta
author_facet Mauad, Melina
Miserendino, María Laura
Risso, Miguel Atilio
Massaferro, Julieta
author_sort Mauad, Melina
title Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
title_short Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
title_full Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
title_fullStr Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
title_full_unstemmed Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco system (Northern Patagonia, Argentina)
title_sort assessing the performance of macroinvertebrate metrics in the challhuaco-ñireco system (northern patagonia, argentina)
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86698
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