Environmental correlates of assemblages of fishes in the Tilostoc River of central Mexico

Ordination, correlation, and regression analyses were used to identify trophic and taxonomic distributional patterns of fishes in the Tilostoc River (located west of Valle de Bravo Lake in the Middle Balsas Basin, central Mexico) and associations of these patterns with environmental variables. Nonme...

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Bibliographic Details
Published in:The Southwestern naturalist 2014-03, Vol.59 (1), p.15-21
Main Authors: Rivas-González, Juan Manuel, de Jesús Rodríguez-Romero, Felipe, de Lourdes Ruiz-Gómez, María, Viveros-Guardado, Diego Alfonso, Taylor, Christopher M
Format: Article
Language:English
Subjects:
Aquatic ecosystems
basins
Biodiversity
Creeks & streams
Dams
Distribution
Endangered & extinct species
environmental factors
Extinction
Feature s
fish
Fish populations
Habitats
Inventory
lakes
multidimensional scaling
Pisces
Precipitation
Regression analysis
Rivers
Seasons
species diversity
streams
Vegetation
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Summary:Ordination, correlation, and regression analyses were used to identify trophic and taxonomic distributional patterns of fishes in the Tilostoc River (located west of Valle de Bravo Lake in the Middle Balsas Basin, central Mexico) and associations of these patterns with environmental variables. Nonmetric multidimensional scaling analysis indicated that trophic and taxonomic assemblages corresponded similarly to measured environmental gradients, especially elevation and velocity of currents. We also compared the trophic structure of assemblages of fishes of the Tilostoc River to that of Terreros Creek, a temperate system of similar size and species richness but with a taxonomically different group of species. The two basins were significantly different, indicating strong historical constraint on trophic structure. Our trophic matrix for Tilostoc River was strongly correlated with the taxonomic matrix.
ISSN:0038-4909
1943-6262
DOI:10.1894/F03-RJE-31.1