Longitudinal distribution of Chironomidae (Diptera) downstream from a dam in a neotropical river/Distribuição longitudinal de Chironomidae (Diptera) abaixo de uma barragem em um rio neotropical

Longitudinal distribution of Chironomidae (Diptera) downstream from a dam in a neotropical river/Distribuição longitudinal de Chironomidae (Diptera) abaixo de uma barragem em um rio neotropical

The damming of a river causes dangerous consequences on structure of the environment downstream of the dam, modifying the sediment composition, which impose major adjustments in longitudinal distribution of benthic community. The construction of Engenlieiro Sérgio Motta Dam in the Upper Paraná River...

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Veröffentlicht in:Brazilian journal of biology 2013-08, Vol.73 (3), p.549
Hauptverfasser: Pinha, G D, Aviz, D, Filho, D R Lopes, Petsch, D K, Marchese, M R, Takeda, A M
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Banks
River ecology
Surface water
Variance analysis
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container_title Brazilian journal of biology
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creator Pinha, G D
Aviz, D
Filho, D R Lopes
Petsch, D K
Marchese, M R
Takeda, A M
description The damming of a river causes dangerous consequences on structure of the environment downstream of the dam, modifying the sediment composition, which impose major adjustments in longitudinal distribution of benthic community. The construction of Engenlieiro Sérgio Motta Dam in the Upper Paraná River has caused impacts on the aquatic communities, which are not yet hilly known. This work aimed to provide more information about the effects of this impoundment 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 Engenlieiro 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. [PUBLICATION ABSTRACT]
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subjects Banks
River ecology
Surface water
Variance analysis
title Longitudinal distribution of Chironomidae (Diptera) downstream from a dam in a neotropical river/Distribuição longitudinal de Chironomidae (Diptera) abaixo de uma barragem em um rio neotropical
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