Figure 4
Identification of keystone taxa from microbial networks of C. elegans exposed to different bacteria. Scatter plot of the mean relative abundance (expressed as clr) vs. the eigenvector centrality of the bacterial taxa (dots or triangles) found in the microbial co-occurrence networks of C. elegans exposed to different symbionts (different E. faecalis populations or P. mendocina) and E. coli OP50. Green dots or triangles represent ubiquitous bacteria (i.e., taxa that were found across all the samples). Cutoff value of 6 were set for the mean relative abundance and 0.75 for the eigenvector centrality. Ubiquitous bacterial taxa with mean relative abundance and eigenvector centrality equal or higher than the cutoff values were considered as keystone taxa (Green triangles). List of keystone taxa is displayed next to the scatter plot. The Venn diagram shows the number of keystone taxa that are shared by or unique in the different experimental groups.
