The elaboration of indices to assess biological water quality. A case study
Autor(a) principal: | |
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Data de Publicação: | 1998 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/5470 |
Resumo: | Here we tested the application of a nodal analysis for the elaboration of biotic indices for particular stressing conditions. The work was carried out in an intermittent Mediterranean stream where superficial flow was absent during summer. The river was perturbed by an effluent with high pH, sulphates, nitrates and conductivity. "Summer" and "winter" samples were treated separately. We first identified groups of sites differing in taxonomical composition by cluster analysis. Then we tested whether groups of sites also differed in their abiotic characteristics. In the following step, groups of cooccurring taxa were also identified by cluster analysis. The indicator value of a taxa group was measured by fidelity measurements for site groups. Indicator taxa were incorporated in a water quality table. The biotic index in the water quality table clearly discriminated impacted from reference sites in the two following years and was correlated with the first axis of a correspondence analysis biplot which also discriminated impacted from clean sites. We suggest that nodal analysis can be a reliable technique for the identification of bioindicators and the elaboration of biotic indices. |
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The elaboration of indices to assess biological water quality. A case studyBiological indicesWater qualityBioindicatorsTemporary riversHere we tested the application of a nodal analysis for the elaboration of biotic indices for particular stressing conditions. The work was carried out in an intermittent Mediterranean stream where superficial flow was absent during summer. The river was perturbed by an effluent with high pH, sulphates, nitrates and conductivity. "Summer" and "winter" samples were treated separately. We first identified groups of sites differing in taxonomical composition by cluster analysis. Then we tested whether groups of sites also differed in their abiotic characteristics. In the following step, groups of cooccurring taxa were also identified by cluster analysis. The indicator value of a taxa group was measured by fidelity measurements for site groups. Indicator taxa were incorporated in a water quality table. The biotic index in the water quality table clearly discriminated impacted from reference sites in the two following years and was correlated with the first axis of a correspondence analysis biplot which also discriminated impacted from clean sites. We suggest that nodal analysis can be a reliable technique for the identification of bioindicators and the elaboration of biotic indices.http://www.sciencedirect.com/science/article/B6V73-3SX5H1V-F/1/2ddcd6137e173976c270b458bbb4c99c1998info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5470http://hdl.handle.net/10316/5470engWater Research. 32:2 (1998) 380-392Graça, M. A. S.Coimbra, C. N.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-01-17T11:49:11Zoai:estudogeral.uc.pt:10316/5470Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:39.072025Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
The elaboration of indices to assess biological water quality. A case study |
title |
The elaboration of indices to assess biological water quality. A case study |
spellingShingle |
The elaboration of indices to assess biological water quality. A case study Graça, M. A. S. Biological indices Water quality Bioindicators Temporary rivers |
title_short |
The elaboration of indices to assess biological water quality. A case study |
title_full |
The elaboration of indices to assess biological water quality. A case study |
title_fullStr |
The elaboration of indices to assess biological water quality. A case study |
title_full_unstemmed |
The elaboration of indices to assess biological water quality. A case study |
title_sort |
The elaboration of indices to assess biological water quality. A case study |
author |
Graça, M. A. S. |
author_facet |
Graça, M. A. S. Coimbra, C. N. |
author_role |
author |
author2 |
Coimbra, C. N. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Graça, M. A. S. Coimbra, C. N. |
dc.subject.por.fl_str_mv |
Biological indices Water quality Bioindicators Temporary rivers |
topic |
Biological indices Water quality Bioindicators Temporary rivers |
description |
Here we tested the application of a nodal analysis for the elaboration of biotic indices for particular stressing conditions. The work was carried out in an intermittent Mediterranean stream where superficial flow was absent during summer. The river was perturbed by an effluent with high pH, sulphates, nitrates and conductivity. "Summer" and "winter" samples were treated separately. We first identified groups of sites differing in taxonomical composition by cluster analysis. Then we tested whether groups of sites also differed in their abiotic characteristics. In the following step, groups of cooccurring taxa were also identified by cluster analysis. The indicator value of a taxa group was measured by fidelity measurements for site groups. Indicator taxa were incorporated in a water quality table. The biotic index in the water quality table clearly discriminated impacted from reference sites in the two following years and was correlated with the first axis of a correspondence analysis biplot which also discriminated impacted from clean sites. We suggest that nodal analysis can be a reliable technique for the identification of bioindicators and the elaboration of biotic indices. |
publishDate |
1998 |
dc.date.none.fl_str_mv |
1998 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/5470 http://hdl.handle.net/10316/5470 |
url |
http://hdl.handle.net/10316/5470 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Water Research. 32:2 (1998) 380-392 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
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1799133843214565376 |