Fig. 3.

Microbial correlation network. Panel a represents a network diagram with nodes (taxa) colored by each of the major five ecological clusters (modules, Mod) within co-occurrence network of bacterial communities; Panel b includes the relative abundance of the five modules. Capital letters indicate the significant differences between the paddy soils (P < 0.05). Lowercase letters indicate the significant differences between the upland soils (P < 0.05); Panel c includes the linear relationships between soil Hg pollution (total Hg and MeHg) and the relative abundance of the selected ecological clusters