FIGURE 5 Impacts of abiotic and biotic factors on microbial compositions in rhizosphere (Rs) and non-rhizosphere (Non-Rs) . Notes: Mantel results on the impacts of examined variables on bacterial and fungal compositions (a) . Relative roles of six variables with low-collinearity on rhizosphere (b) and non-rhizosphere bacterial compositions (c) . Relative roles of six variables with low-collinearity on rhizosphere (d) and non-rhizosphere fungal compositions (e) . SBI, RBI, RTC, RTN, STC, STN, STP, SAN, SAP, and SM are the same as in Figure 4. OverallR 2 indicates the total explained fraction by the six variables.