Fig. 4

Distinct patterns of the prokaryotic co-occurrence networks in the three sampling regions. A Co-occurrence network analysis of the three regions. The size of the nodes corresponds to their rank order of degree. The nodes are connected by pink or green edges, which indicate significantly positive or negative relationships (estimated by Spearman’s correlation with a significance level of 0.01), respectively. The absolute values of the correlation coefficients represent the correlation strength, such that thicker edges indicate stronger correlations. B Network topological parameters for these habitats. NSCS indicates Haima and Site F, whereas SWIO indicates Longqi