TABLE 2.

Comparison of topological parameters between the network and its corresponding random network (Z-test).

Topological Parameters	Description	Real	Random
Number of nodes	Number of operational taxonomic units (OTUs) in the network	942	942
Number of edges	Strong and significant correlations	3206	3206
Negative edges	Negative correlations	105	105
Average degree	Average number of neighbors for all nodes	6.807	6.807
Average path length	Average of the shortest path lengths connecting each node to all other nodes	7.045	3.783 ± 0.006*
Clustering coefficient	Fraction of observed vs. possible clusters for each node	0.531	0.007 ± 0.001*
Centralization betweenness	The number of shortest paths between any two nodes in the graph passing through that node	0.09	0.012 ± 0.002*
Modularity	Tendency of a network to contain sub-clusters of nodes	0.827	0.355 ± 0.003*

^∗P < 0.05.