Fig. S12. Relative rates of recombination to mutation (r/m) calculated across the 12 waterworks for the Nitrospira populations (yellow) on synonymous third position codon sites, compared with previous values (blue) reported by Lin and Kussell (https://doi.org/10.1038/s41592-018-0293-7), the value reported for Streptomyces flavogensis by Doroghazi and Buckley (https://doi.org/10.1038/ismej.2010.45), and the value reported for Staphylococcus pseudintermedius by Smith et al. (2020) (https://doi.org/10.1038/s42003-020-1009-y). Error bars represent the 95% confidence interval across 1000 bootstraps.