Linear regression relationships between temporal change in beta diversity (dissimilarity in grey, turnover in blue, and nestedness in green, y-axis) of overall, native, and non-native fish assemblages in each oxbow lake and their location, i.e., distances from the river sources (DRS, x-axis). The p value for each correlation pair is given. Only correlations with statistical significance (p < 0.05) are presented in solid lines.