Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers

P. 323-340

Detalhes bibliográficos
Autores: Lobo, Eduardo A., Wetzel, Carlos Eduardo, Ector, Luc, Blanco Lanza, Saúl, Katoh, Kazuhiro, Mayama, Shigeki
Tipo de documento: artigo
Data de publicação:2010
País:España
Recursos:Universidad Rey Juan Carlos
Repositório:BULERIA. Repositorio Institucional de la Universidad de León
OAI Identifier:oai:buleria.unileon.es:10612/7100
Acesso em linha:http://hdl.handle.net/10612/7100
Access Level:Acceso aberto
Palavra-chave:Biología
Ecología. Medio ambiente
Diatomeas
Diatoms
Brasil
Ríos
Eutrofización
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spelling Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian riversLobo, Eduardo A.Wetzel, Carlos EduardoEctor, LucBlanco Lanza, SaúlKatoh, KazuhiroMayama, ShigekiBiologíaEcología. Medio ambienteDiatomeasDiatomsBrasilRíosEutrofizaciónP. 323-340This work aims to analyse the response of epilithic diatom communities to environmental gradients in subtropical temperate southern Brazilian rivers to contribute to the development of a widely applicable methodology for water-quality monitoring. Samples for physical, chemical and biological determination were collected monthly, from December 2001 to November 2002 and from March 2003 to February 2004, at 9 stations along the rivers Pardo and Pardinho in the hydrographical basin of Rio Pardo, State of Rio Grande do Sul (RS), Brazil. Physical and chemical variables (water temperature, pH, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, nitrates, nitrites, phosphates and total dissolved solids) and biological variables (epilithic diatom communities) were used as parameters for water-quality assessment. The data matrix was examined by means of a multivariate ordination using Detrended Correspondence Analysis (DCA). In total, 270 taxa were identied to specic or infra-specic levels. The results showed that of all the physical and chemical variables used, the main gradient along the DCA rst axis was eutrophication, which was indicated by its signicant correlation with phosphates ( p < 0.001). Hence, the species’ scores on the DCA axis were used as an operational criterion for indicating their tolerance to eutrophication. From this analysis, the 10 taxa that were the most tolerant to eutrophication were: Cyclotella meneghiniana, Fallacia monoculata, Nitzschia acicularis, N. clausii, N. nana, N. palea, Nitzschia sp., Pinnularia sp., Sellaphora pupula sensu lato and Ulnaria acus. The present study showed that epilithic diatom assemblages reect anthropogenic changes in hydrographic basins in subtropical temperate streams, especially pollution by organic enrichment and eutrophicationSIAsociación Ibérica de LimnologíaEcologiaInstituto de Medio Ambiente, Recursos Naturales y Biodiversidad de la Universidad de Léon20102018info:eu-repo/semantics/articlehttp://hdl.handle.net/10612/7100reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad Rey Juan CarlosInglésinfo:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/71002026-06-24T12:43:27Z
dc.title.none.fl_str_mv Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
title Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
spellingShingle Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
Lobo, Eduardo A.
Biología
Ecología. Medio ambiente
Diatomeas
Diatoms
Brasil
Ríos
Eutrofización
title_short Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
title_full Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
title_fullStr Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
title_full_unstemmed Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
title_sort Response of epilithic diatom communities to environmental gradients in subtropical temperate Brazilian rivers
dc.creator.none.fl_str_mv Lobo, Eduardo A.
Wetzel, Carlos Eduardo
Ector, Luc
Blanco Lanza, Saúl
Katoh, Kazuhiro
Mayama, Shigeki
author Lobo, Eduardo A.
author_facet Lobo, Eduardo A.
Wetzel, Carlos Eduardo
Ector, Luc
Blanco Lanza, Saúl
Katoh, Kazuhiro
Mayama, Shigeki
author_role author
author2 Wetzel, Carlos Eduardo
Ector, Luc
Blanco Lanza, Saúl
Katoh, Kazuhiro
Mayama, Shigeki
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ecologia
Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad de la Universidad de Léon
dc.subject.none.fl_str_mv Biología
Ecología. Medio ambiente
Diatomeas
Diatoms
Brasil
Ríos
Eutrofización
topic Biología
Ecología. Medio ambiente
Diatomeas
Diatoms
Brasil
Ríos
Eutrofización
description P. 323-340
publishDate 2010
dc.date.none.fl_str_mv 2010
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10612/7100
url http://hdl.handle.net/10612/7100
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Asociación Ibérica de Limnología
publisher.none.fl_str_mv Asociación Ibérica de Limnología
dc.source.none.fl_str_mv reponame:BULERIA. Repositorio Institucional de la Universidad de León
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BULERIA. Repositorio Institucional de la Universidad de León
collection BULERIA. Repositorio Institucional de la Universidad de León
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869412668604940288
score 15,300719

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