Fig. 3

The influence of specific bacterial families on the maternal transmission signal. Effect sizes for (a) the main effect of mother-offspring status, and (b) the interaction between mother-offspring status and age class similarity and 95% credible intervals are plotted from 146 Bayesian regression models, in each of which a single bacterial family was excluded. One might expect to see a relationship between the species richness of a dropped family and the resulting effect size—with the exclusion of a more diverse family being associated with a smaller resulting effect size. To assess this, effects are plotted against the species richness of each dropped family (logged number of ASVs), though no such relationship is observed. Effect sizes and their 95% credible intervals from the full model (with no bacterial families dropped) are included for reference on the far right (in red)