Fig. 5

Plant rhizosphere and the corresponding bulk soil networks in the inter- and monocropping systems. Networks represent random matrix theory co-occurrence models derived from 8 biological replicates at each site, where nodes represent OTUs, and the edges between the nodes indicate significant correlations. A green edge indicates negative covariation between two individual nodes, while a red edge indicates positive covariation. The colours of the nodes indicate major phyla (subphyla for Proteobacteria). In each panel, the size of each node is proportional to the number of connections (i.e. node degree). Nodes marked “H1, H2 and H3” represent the identified module hubs as follows: H1, OTU1 Dokdonella; H2, OTU235 Catenulispora; and H3, OTU73 Pseudolabrys