Erratum: Influence of spatial positioning within stream networks on fish assemblage structure in the Kansas River basin, USA

2010 ◽  
Vol 67 (3) ◽  
pp. 596-596
Author(s):  
Darren J. Thornbrugh ◽  
Keith B. Gido
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Assemblage Structure ◽  
Fish Assemblage Structure ◽  
Stream Networks ◽  
Kansas River ◽  
Spatial Positioning

Influence of spatial positioning within stream networks on fish assemblage structure in the Kansas River basin, USA

2010 ◽  
Vol 67 (1) ◽  
pp. 143-156 ◽  
Author(s):  
Darren J. Thornbrugh ◽  
Keith B. Gido
Keyword(s):  
River Basin ◽  
Fish Assemblages ◽  
Assemblage Structure ◽  
Fish Assemblage Structure ◽  
Stream Network ◽  
Close Proximity ◽  
Kansas River ◽  
Stream Size ◽  
Spatial Positioning ◽  
Stream Fish Assemblages

We found that riverine confluences had localized effects (within 20 km) on stream fish assemblages of the Kansas River basin. The majority of variation in fish assemblages occurred from east to west and along a stream size gradient. After controlling for the influences of longitude and stream size, distance of sample sites from streams ≥ 5th order accounted for a small proportion of taxonomic variability. However, species richness was significantly higher and assemblage structure was different in tributary stream segments directly connected to larger-ordered streams, suggesting that the effects of spatial position within this stream network were greatest in close proximity to tributary–mainstem confluences. Fish collections from three intensively sampled tributaries also indicated an abrupt change in species assemblages between mainstem river sites and tributary sample sites above confluences, followed by a gradual taxonomic change with increasing distance up to 20 km from the confluence. Changes in fish assemblages were associated with the reduced abundance of adult stream species near the confluence with the mainstem, rather than the occurrences of riverine species in the tributary.

scholarly journals Spatial and seasonal patterns in fish assemblage in Corrego Rico, upper Parana River basin

2013 ◽  
Vol 11 (1) ◽  
pp. 143-152 ◽  
Author(s):  
Erico L. H Takahashi ◽  
Fabricio R. T. Rosa ◽  
Francisco Langeani ◽  
Laura S. O. Nakaghi
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Assemblage Structure ◽  
Paraná River ◽  
Fish Assemblage Structure ◽  
Water Parameters ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Paraná River Basin

The upper Paraná River basin drains areas of intensive industry and agriculture, suffering negative impacts. The Córrego Rico flows through sugar cane fields and receives urban wastewater. The aim of this work is to describe and to compare the fish assemblage structure in Córrego Rico. Six standardized bimonthly samples were collected between August 2008 and June 2009 in seven different stretches of Córrego Rico. Fishes were collected with an experimental seine and sieves, euthanized, fixed in formalin and preserved in ethanol for counting and identification. Data were recorded for water parameters, instream habitat and riparian features within each stretch. Non-metric multidimensional scaling, species richness and diversity analysis were performed to examine spatial and seasonal variation in assemblage structure. Fish assemblage structure was correlated with instream habitat and water parameters. The fish assemblage was divided in three groups: upper, middle and lower reaches. High values of richness and diversity were observed in the upper and lower stretches due to connectivity with a small lake and Mogi Guaçu River, respectively. Middle stretches showed low values of richness and diversity suggesting that a small dam in the middle stretch negatively impacts the fish assemblage. Seasonal differences in fish assemblage structure were observed only in the lower stretches.

scholarly journals Fish assemblage structure in tributaries of the Meia Ponte River, Goiás, Brazil

2007 ◽  
Vol 5 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Afonso P. Fialho ◽  
Leandro G. Oliveira ◽  
Francisco L. Tejerina-Garro ◽  
Luiz C. Gomes
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Rainy Season ◽  
Fish Assemblages ◽  
Detrended Correspondence Analysis ◽  
Abundant Species ◽  
Assemblage Structure ◽  
Data Matrix ◽  
Sampling Station ◽  
Fish Assemblage Structure

This study was conducted in the Meia Ponte River basin, which is located in the Cerrado biome. The objective was to describe the structure of fish assemblages and to evaluate the results with the regard to the position of the tributaries (sampling stations) along the basin. This basin drains 35 municipalities of Goiás State. Springs of the Meia Ponte are located in the district of Itauçu (GO), in the Serra dos Brandões. Two sampling were conducted, one in the rainy season (March/2001) and another in the dry season (August/2001). Thirty sampling sites in tributaries and one in the channel of the Meia Ponte River, in its upper course, were selected to capture fish with dipnets (3 mm mesh) during one hour, along 100-m stretch. Sampling periods (season; rainy and dry) and the categorization according to the distance of the sampling station from the mouth of the Meia Ponte River (position; upper, intermediate and lower) were used to evaluate differences in fish assemblage structure, summarized by a detrended correspondence analysis (DCA), applied on the abundance data matrix, squared root transformed, to eliminate the effect of abundant species. The first two axes were retained for interpretation (eigenvalues = 0.35 and 0.24, for axis 1 and 2, respectively). The two-way ANOVA (factors seasons and positions) identified significant differences (p <0.05) in score averages for axis 1 and 2, for both factors. These results suggest significant differences in fish assemblage structure in the Meia Ponte River basin for the seasons (rainy and dry) and positions (upper, intermediate and lower) studied, in spite of the short spatial scale. These findings demonstrate a great ichthyofauna heterogeneity in the uppermost part of the Paraná River.

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