Fig. 4: Interaction network based on the top 50 bacterial species.

a The interaction network of HOS species. b The interaction network of LOS species. Nodes are sized by their degree and colored by node grouping, while edges are thickened based on R value magnitude and colored red for positive or green for negative correlation. Only P < 0.05 and the correlation coefficient > |0.5| for the top 50 most abundant species are retained. c The closeness and degree of species in the LOS network.