3.6 Microbial networks and topological properties
Based on the Spearman correlation (p <0.05) between soil physical and chemical properties, metal groups, bacteria, and fungi ASVs levels (relative abundance >0.1%), microbial networks in three types of soils were constructed (Fig. 7 ). The results show that compared with control, the number of points, connections, average degree, modularity, and module books in PS and OS networks are gradually reduced. Interestingly, in the PS network, the proportion of positive connections decreased significantly to 55.4%, and in the OS network, the number of positive connections rebounded to 60.8%. In addition, the network survivability test results show that the stability of the three networks from high to low is Control, PS, and OS.