FIGURE 5.

Effect of site‐environmental factors on bacterial communities' diversity in BSCs and DLs. Results of the variation partitioning model used to identify the effects of the physio‐chemical explanatory variables (Table 1) on the bacterial communities of (A) BSC and (B) DL are reported as bar plots. Results of sequential test run considering all the factors are reported as pie charts. The three most important variables explaining the variance of the bacteria communities in BSC (i.e., DOC, pH and RH) and DL (i.e., Fe, P and K) are used to evaluate their correlation with the bacterial taxa inhabiting the samples. Metacoder‐generated trees indicate the taxa that significantly (p < 0.05) correlated positively (shade of blue) or negatively (shade of red) with the selected physico‐chemical variables. Taxa non‐significantly correlated with such variables are indicated in grey.