Figure 3.

Effects of putative biotic associations on microbial alpha‐ and beta‐diversity. (A) Random forest (RF) predicted the importance (percentage of increase of mean square error [MSE]) of drivers without and with biotic factors for species richness of bacterial communities. (B) Distance‐based redundancy analysis (dbRDA) ordination plotted the relationships between drivers without and with biotic factors and community dissimilarity of bacterial communities. The bottom bar showed the change in the change of explanation. Significance was expressed as ***p < 0.001; **p < 0.01; *p < 0.05. Lat, latitude; Long, longitude; MAP, mean annual precipitation; MAT, mean annual temperature; NA, negative associations; PA, positive associations; TC, total C; TN, total N; TK, total K; TP, total P.