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).