Data/hora: 07/06/2024 08:10:43

Provedor de dados: | 52
País: | Brazil
Título: | Assessing of biotic integrity of the fish community in a heavily impacted segment of a tropical river in Brazil
Autores: | Pinto,Benjamin Carvalho Teixeira; Araújo,Francisco Gerson.
Data: | 2007-05-01
Ano: | 2007
Palavras-chave: | Fish community; IBI; Environmental quality; Habitats; Tropical rivers; Biomonitoring.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300015
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132007000300015
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.50 n.3 2007
Fonte: | info:eu-repo/semantics/openAccess