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- Title
Longitudinal distribution of Chironomidae (Diptera) downstream from a dam in a neotropical river.
- Authors
Pinha, G. D.; Aviz, D.; Lopes Filho, D. R.; Petsch, D. K.; Marchese, M. R.; Takeda, A. M.
- Abstract
The damming of a river causes dangerous consequences on structure of the environment downstream of the dam, modi-fying the sediment composition, which impose major adjustments in longitudinal distribution of benthic community. The construction of Engenheiro Sérgio Motta Dam in the Upper Paraná River has caused impacts on the aquatic com-munities, which are not yet fully known. This work aimed to provide more information about the effects of this im-poundment on the structure of Chironomidae larvae assemblage. The analysis of data of physical and chemical variables in relation to biological data of 8 longitudinal sections in the Upper Paraná River showed that composition of Chironomidae larvae of stations near Engenheiro Sérgio Motta Dam differed of the other stations (farther of the Dam). The predominance of coarse sediments at stations upstream and finer sediments further downstream affected the choice of habitat by different morphotypes of Chironomidae and it caused a change in the structure of this assemblage in the longitudinal stretch.
- Subjects
LATIN America; CHIRONOMIDAE; DAMS; RIVER ecology; RIVER sediments; BENTHIC animals; INSECT larvae; HABITATS
- Publication
Brazilian Journal of Biology, 2013, Vol 73, Issue 3, p549
- ISSN
1519-6984
- Publication type
Article
- DOI
10.1590/S1519-69842013000300013