Figure 3.

a Morisita’s index of similarity from pairwise comparisons between samples plotted against difference in water temperature at sample site at sampling occasion. Correlation coefficient between Morisita’s index data and difference in water temperature, −0.64. b Phylogenetic similarity from pairwise comparisons between samples plotted against difference in water temperature at sample site at sampling occasion. Correlation coefficient between phylogenetic similarity and difference in water temperature, −0.50