Degree of co-occurrence and abundance of csOTUs. Relative abundance (as counts per million, CPM) of all OTUs from the soil and root microbiome co-occurrence networks (Fig.
) was plotted as a function of their degree of co-occurrence. Circles and triangles refer to bacteria and fungi, respectively. OTUs were colored by their association to the different cropping systems and keystone OTUs (top 1% degree of co-occurrence) have yellow background. Side panels recapitulate the distributions of co-occurrence degrees and abundance for the csOTUs (shapes colored by association to cropping systems) compared to the density of all