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Spatial effects of reservoirs on fish assemblages in great plains streams in Kansas, USA

TitleSpatial effects of reservoirs on fish assemblages in great plains streams in Kansas, USA
Publication TypeJournal Article
Year of Publication2006
AuthorsFalke, JA, Gido, KB
JournalRiver Research and Applications
Volume22
Pagination55-68
Keywordsreservoirs introduced species stream fish assemblages spatial effects Great Plains Kansas upstream community structure species-diversity prairie stream united-states river basins flow regime impoundment upstream patterns drainage
Abstract

{Reservoirs are important components of modern aquatic ecosystems that have negative impacts on native aquatic biota both up-and downstream. We used a landscape-scale geographic information system (GIS) approach to quantify the spatial effects of 19 large reservoirs on upstream prairie fish assemblages at 219 sites in Kansas, USA. We hypothesized that fish assemblage structure would vary with increasing distance from a reservoir and that the abundance of reservoir fishes in upstream reaches would decline with distance from a reservoir. Ordination of sample sites showed variation in fish assemblage structure occurred primarily across river basins and with stream size. Variance partitioning of a canonical ordination revealed that the pure effect of reservoir distance explained a small but significant (6%; F = 4.90

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