Brazilian Archives of Biology and Technology | |
Assessing of biotic integrity of the fish community in a heavily impacted segment of a tropical river in Brazil | |
Benjamin Carvalho Teixeira Pinto1  Francisco Gerson Araújo1  | |
[1] ,Universidade Federal Rural do Rio de Janeiro Laboratório de Ecologia de Peixes Seropédica RJ ,Brasil | |
关键词: Fish community; IBI; environmental quality; habitats; tropical rivers; biomonitoring; | |
DOI : 10.1590/S1516-89132007000300015 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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RO202005130165633ZK.pdf | 226KB | download |