Ichthyological Differentiation and Homogenization in the Pánuco Basin, Mexico
2020
Norma Martínez-Lendech | Ana P. Martínez-Falcón | Juan Jacobo Schmitter-Soto | Humberto Mejía-Mojica | Valentino Sorani-Dalbón | Gabriel I. Cruz-Ruíz | Norman Mercado-Silva
Species introductions and extirpations are key aspects of aquatic ecosystem change that need to be examined at large geographic and temporal scales. The Pá:nuco Basin (Eastern Mexico) has high ichthyological diversity and ecological heterogeneity. However, freshwater fish (FWF) introductions and extirpations since the mid-1900s have modified species range and distribution. We examine changes in FWF species composition in and among four sub-basins of the Pá:nuco by comparing fish collection records pre-1980 to 2018. Currently, the FWF of the Pá:nuco includes 95 species. Fishes in the Poeciliidae, Cyprinidae, and Cichlidae, respectively, comprised most records over time. Significant differences in species composition were found between the first (pre-1980) and last (2011&ndash:2018) study periods, but not for periods in-between. Eight independent species groups were key for explaining changes in Pá:nuco river ichthyofauna: one group was dominated by invasive species, and saw increases in the number of records across study periods (faunal homogenization). Another group was formed by species with conservation concern with a declining number of records over time. Thirteen (2 native and 11 non-native) species were responsible for temporal turnover. These results strongly suggest high rates of differentiation over time (via native species loss) following widespread non-native species introductions.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Multidisciplinary Digital Publishing Institute