Fig. 2

Co-occurrence network interactions between prokaryotes of the microbial community in sewage sludge (SL), unamended soil samples (S1, S2) and soils amended with sewage sludge (S1SL, S2SL). Interactions with significant Spearman’s correlations were considered for the analysis (p < 0.05 and r_s > 0.56). Node size is proportional to the average relative abundance and node color represents the phylum of the respective taxon. Edge color represents positive (blue) and negative (red) correlations between taxa, and the edge width represents the strength of the correlation. The network included only the taxa that contributed with at least 1% of the average total abundance. Cluster S1 S2 is composed of taxa with similar abundance between treatments S1 and S2, and cluster S1SL S2SL is composed of taxa with similar abundance between treatments S1SL and S2SL. Topological features for the construction of the network were detailed in supplementary Table S4 and overall correlations between clusters were summarized in Table S5.