Figure 3.

Distance-based redundancy analysis (dbRDA) calculated based on a Bray-Curtis dissimilarity matrix and standardized, log-normalized geochemical parameters. The distance matrix was calculated based on relative abundances of microbial genera in 21 fluid samples with geochemical data. Results of a non-parametric permutational multivariate analysis of variance (perMANOVA) are stated in the frame adjacent to the dbRDA panel. perMANOVA was calculated using the ‘adonis’ function of the ‘vegan’ package in R (Oksanen et al., 2013).