2013
DOI: 10.1007/s10641-013-0175-x
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To what extent are the fish compositions of a regulated river related to physico-chemical variables and habitat structure?

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Cited by 11 publications
(8 citation statements)
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“…Physico-chemical variables showed little variation among sites and, as a result there was no significant relationship between the abundance, distribution and community composition of fishes and the physico-chemical environment of sampling sites. This is consistent with observations that in regulated rivers, physico-chemical variables have little influence on structuring of fish assemblages when compared to the effects Mattos et al, 2014). River regulation, in terms of barriers, appeared to be a far greater determinant of species composition and distribution in the Baakens River, particularly for migrating fishes of marine origin.…”
Section: Discussionsupporting
confidence: 89%
“…Physico-chemical variables showed little variation among sites and, as a result there was no significant relationship between the abundance, distribution and community composition of fishes and the physico-chemical environment of sampling sites. This is consistent with observations that in regulated rivers, physico-chemical variables have little influence on structuring of fish assemblages when compared to the effects Mattos et al, 2014). River regulation, in terms of barriers, appeared to be a far greater determinant of species composition and distribution in the Baakens River, particularly for migrating fishes of marine origin.…”
Section: Discussionsupporting
confidence: 89%
“…Low turbidity values (3-97 NTU) were also observed in other studies of rivers in this state (Petry & Schulz, 2006;Salomoni et al, 2006;König et al, 2008;Blume et al, 2010;Pimenta et al, 2012;Panizzon et al, 2013). High turbidity is associated with a lack of marginal vegetation and deforested areas that favor runoff of sediment during rainy periods (Wachholz et al, 2011;Mattos et al, 2014). The turbidity values recommended by Conselho Nacional do Meio Ambiente (CONAMA-2005) are up to 100 NTU (around 69-81 mg L -1 depending on the type of sediment).…”
Section: +supporting
confidence: 58%
“…Water quality can be affected by several factors, such as climate, size of the watershed, topography, geology, rain and soil type (Wachholz et al, 2011;Gaida et al, 2012;Mattos et al, 2014). Previous analysis of water from ponds and streams from Rio Grande do Sul presented mean pHs similar to those found in the different regions of this study (Rheinheimer & Souza, 2000;Diel et al, 2007;König et al, 2008;Pimenta et al, 2012;Silva et al, 2012), but in water used for human consumption from artesian wells, from the north central region minimum pH values were down to 4.4 and the maximum up to 10.0 (Rheinheimer & Souza, 2000).…”
Section: Discussionmentioning
confidence: 99%
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“…In fact, ecological flow should be a time series of discharge within a range, considering different life stages of target species and hydrological seasonality. The spawning habitat condition was vital to fish, which has been well documented (Knaepkens, Bruyndoncx, Coeck, & Eens, ; Mattos, Costa, Pinto, Borges, & Araújo, ; Thorstad, Økland, Aarestrup, & Heggberget, ). However, the feeding and overwintering habitat was important as well.…”
Section: Discussionmentioning
confidence: 91%