Beta diversity of stream fish assemblages: partitioning variation between spatial and environmental factors

2017 ◽  
Vol 62 (8) ◽  
pp. 1460-1471 ◽  
Author(s):  
Zachery D. Zbinden ◽  
William J. Matthews
Keyword(s):  
Environmental Factors ◽  
Beta Diversity ◽  
Fish Assemblages ◽  
Stream Fish ◽  
Stream Fish Assemblages

Ecoregional, catchment, and reach-scale environmental factors shape functional-trait structure of stream fish assemblages

Hydrobiologia ◽  
2015 ◽  
Vol 753 (1) ◽  
pp. 265-283 ◽  
Author(s):  
Allison A. Pease ◽  
Jason M. Taylor ◽  
Kirk O. Winemiller ◽  
Ryan S. King
Keyword(s):  
Environmental Factors ◽  
Fish Assemblages ◽  
Functional Trait ◽  
Stream Fish ◽  
Trait Structure ◽  
Stream Fish Assemblages

Stream fish assemblages in relation to environmental factors on a montane plateau (Nyika Plateau, Malawi)

2008 ◽  
Vol 83 (4) ◽  
pp. 417-428 ◽  
Author(s):  
Wilbert T. Kadye ◽  
Christopher H. D. Magadza ◽  
Ngonidzashe A. G. Moyo ◽  
Shakkie Kativu
Keyword(s):  
Environmental Factors ◽  
Fish Assemblages ◽  
Stream Fish ◽  
Stream Fish Assemblages

Watershed, reach, and riparian influences on stream fish assemblages in the Northern Lakes and Forest Ecoregion, U.S.A.

2003 ◽  
Vol 60 (5) ◽  
pp. 491-505 ◽  
Author(s):  
Lizhu Wang ◽  
John Lyons ◽  
Paul Rasmussen ◽  
Paul Seelbach ◽  
Thomas Simon ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Fish Assemblages ◽  
Cold Water ◽  
Spatial Scales ◽  
Relative Influence ◽  
Stream Fish ◽  
Watershed Scale ◽  
Small Streams ◽  
Stream Fish Assemblages ◽  
Sand And Gravel

We analyzed data from 79 watersheds in an undegraded U.S. ecoregion to identify key environmental factors that explained stream fish assemblage patterns and to evaluate the relative influence of environmental factors operating at different spatial scales. A few key factors from the watershed, reach, and riparian scale explained a significant amount of the variance in fish attributes. Three environment–fish associations were evident. Top carnivores and intolerant cold-water fishes were associated with relatively narrow, deep, high-gradient, cold streams with strong groundwater inputs. Tolerant cyprinids occurred in small streams with low groundwater input, low dissolved oxygen, and abundant macrophytes. A diverse assemblage (Cyprinidae, Catostomidae, Centrarchidae, Percidae) existed in warm, wide streams in watersheds dominated by lacustrine sand and gravel geology and abundant wetlands and lakes. Overall, reach-scale variables directly explained the most, watershed-scale variables less, and riparian-scale variables the least variation in fish attributes. Watershed and riparian variables had indirect connections with fishes through their direct influence on reach variables. In conjunction with findings from more degraded regions, we conclude that the relative influence of reach-scale variables on fishes are greatest in undegraded areas and that direct effects of watershed-scale variables are increasingly important as human modifications of the landscape increase.

scholarly journals Taxonomic and functional turnover of Amazonian stream fish assemblages is determined by deforestation history and environmental variables at multiple scales

2021 ◽  
Vol 19 (3) ◽  
Author(s):  
Gabriel L. Brejão ◽  
David J. Hoeinghaus ◽  
Camilo A. Roa-Fuentes ◽  
María Angélica Pérez-Mayorga ◽  
Silvio F. B. Ferraz ◽  
...  
Keyword(s):  
Land Use ◽  
Environmental Factors ◽  
Fish Assemblages ◽  
Multiple Scales ◽  
Functional Trait ◽  
Stream Fish ◽  
Time Lags ◽  
Ecological Processes ◽  
Β Diversity ◽  
Stream Fish Assemblages

Abstract High rates of deforestation, either in the past or the present, affect many of the ecological processes in streams. Integrating deforestation history and the current landscape structure enhances the evaluation of ecological effects of land-use change. This is especially true when contemporary landscape conditions are similar but the temporal path to those conditions differs. One approach that has shown promise for evaluating biodiversity responses over time and space is the β-diversity partitioning, which combines taxonomic and functional trait-based approaches. We tested hypotheses related to stream fish assemblages’ turnover in watersheds with different environmental conditions and deforestation histories. We sampled fish from 75 watersheds in the Machado River basin, Brazil, and environmental factors were quantified at multiple scales. Taxonomic turnover was higher than expected by chance, whereas functional turnover was lower than expected by the observed taxonomic turnover, indicating that deterministic processes are structuring these assemblages. The turnover, and the environmental factors differed among watersheds with different deforestation histories. Besides being scale-dependent, turnover patterns are also likely dependent on land use dynamics and involve time-lags.

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