Figure 2.

Environmental responses of the four identified pools of bacteria. Variation in the R coefficients of the Mantel correlations between the taxonomic dissimilarity matrices calculated for the four different subsets of bacteria (see legend), and the differences in pH within each type of ecosystem, excluding the tree leaves (a). Fraction of pairwise dissimilarity between communities due to OTU turnover for each type of ecosystem (b). Soils and soilwaters were considered together because communities aligned along the same pH gradient (see Supplementary Figure S2 from Ruiz-González et al., 2015). Letters on panel (b) refer to an ANOVA with a Tukey’s post hoc test, where different letters indicate significant differences (P<0.05) between pools of taxa for each type of ecosystem.