Fig. 6: Ecological clusters based on multitrophic networks.

Co-occurrence network diagram with nodes colored according to ecological clusters (a); the relative abundance of each module (b); the correlations of the relative abundance of Module 2 with normalized reads of C-decomposition and N-mineralization genes (c) in a Mollisol amended without (Control) and with maize and soybean residues for 7 and 250 days. Different letters above bars (b) indicate significant differences among treatments at p < 0.05 (one-way ANOVA). Error bars are the standard error of three replicates. The shading area (c) indicates 95% confidence interval.