Table 1. Topological parameters of the network of bacterial and fungal communities.

Topological parameters	Description	Bacterial	Fungal
Number of nodes	Number of OTUs in the network	904	238
Number of edges (in total)	Strong and significant correlations	21,463	1,348
Number of edges (positive)	Positive correlations	18,419	1,253
Number of edges (negative)	Negative correlations	3,044	95
Clustering coefficient	The fraction of observed vs. possible clusters for each node	0.440	0.451
Characteristic path length	The median of the means of the shortest path lengths connecting each vertex to all other vertices	2.887	3.829
Network density	The ratio of the number of edges and the number of possible edges	0.053	0.048
Network heterogeneity	Density distribution of connections between nodes	0.929	1.107
Modularity	Tendency of a network to contain sub-clusters of nodes	0.52	0.599