Figure 4

The relative functional abundance of soil bacterial communities based on heatmap of KEGG using hierarchical clattering and unweighted pair group method with arithmetic mean in the two horizons and three forest types (a) at Tiantangzhai and (b) Yaoluoping Nature Reserve. Nonmetric multidimensional scaling ordination (NMDS) of soil bacterial functional communities (c) at Tiantangzhai and (d) Yaoluoping Nature Reserve. Significantly altered bacterial communities between O and M horizon as measured by the response ratio method at the 95% confidence interval (Welch’s t-test) at (e) Tiantangzhai and (f) Yaoluoping Nature Reserve.