3.2 | Differences in trait-environment relationships between habitat types
The relative importance of annual mean temperature and annual precipitation, as well as the slopes of the considered trait-environment relationships, differed between lentic and lotic assemblages. Among the 24 considered relationships (models of the two traits, corrected for phylogenetic and spatial autocorrelation), 6 were significant for both lentic and lotic assemblages, 6 were only significant for lentic and 5 were only significant for lotic assemblages (Table 2). The two groups mostly responded similarly to annual mean temperature and all the relationships that were only significant in lotic assemblages were responses to annual precipitation (see Table S4 for single regression models).
Except for one response of body size, the slopes of all relationships of climate variables with the average as well as the phylogenetically predicted part of the variation in the traits were similar in their strength between the two groups. By contrast, responses of the species-specific part of the variation in colour lightness and body size to climate were mostly stronger in lentic compared to lotic assemblages (Table 2).