Fig. 7
A Correlation-based networks of the bacterial communities. Bacterial OTUs are represented as nodes and significant correlations as edges. The size of each node is proportional to the degree of the OTU and the node color indicates the corresponding module (a) or taxonomic assignment at the phylum level (b). B The Wilcox test was used to compare the node-level degree and betweenness centrality among the three habitats (* P < 0.05, ** P < 0.01, *** P < 0.001, n.s. not significant). GTZ, MR, and AM represent the glacier terminus zone, moraine ridge, and alpine meadow, respectively