Fig. 3

Eubacterium rectale subspecies distribution suggests subspecies are isolated by distance. a Relative prevalence of E. rectale subspecies per country (European countries are aggregated). The size of the pie charts is proportional to the total number of genomes obtained per region/country. For a map of Europe, see Additional file 1: Fig. S13. b Pairwise approximated geographic distances between subspecies (considering representative locations) correlate with their median genetic distances (“Materials and methods” for details). A Mantel test between pairwise genetic and geographic distances using the Pearson correlation coefficient yielded a correlation of 0.73 and a p value of 0.041