| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Assessing of biotic integrity of the fish community in a heavily impacted segment of a tropical river in Brazil
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| Autores: |
Pinto,Benjamin Carvalho Teixeira
Araújo,Francisco Gerson
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| Data: |
2007-05-01
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| Ano: |
2007
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| Palavras-chave: |
Fish community
IBI
Environmental quality
Habitats
Tropical rivers
Biomonitoring
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| Resumo: |
A index of biotic integrity (IBI) was applied to assess the ecological health at seven sites of ca. 338 km extension of the Paraíba do Sul river, in bracketing a large urban-industrial complex. The aim was to evaluate the index response to changes in environmental quality during two seasons (winter/dry versus. summer/wet). Eight metrics were selected to IBI in three categories: 1) species richness and habitat composition; 2) indicator species; and 3) trophic structure. The IBI, based on the least impacted regional condition, showed the highest value at the most upstream site (Queluz=km 0) - Acceptable, then decreasing downstream and reaching the lowest record at Volta Redonda (km 125) - Impacted; afterwards there was an increasing quality toward the most downstream sites until reaching better scores at Além Paraíba (km 338) - Moderate Impacted/ Acceptable. During the winter/dry seasons a clearer spatial trend was detected when compared with oscillations in summer/wet. The IBI proved to be a suitable tool to evaluate environmental quality in this tropical and very altered large river, since it was sensitive to non-source point pollution changes, which occurred all over the studied area.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300015
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/S1516-89132007000300015
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.50 n.3 2007
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| Direitos: |
info:eu-repo/semantics/openAccess
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