Fig. 5From: Tree and shrub richness modifies subtropical tree productivity by regulating the diversity and community composition of soil bacteria and archaeaThe co-occurrence networks of bacterial communities (a) and archaeal communities (b) in three tree species richness levels, monocultures, two-species mixtures and four species-mixtures, respectively. The nodes in the networks are colored according to the taxonomic assignments at phylum level and the size of each node is proportional to the relative abundanceBack to article page