Extended Data Fig. 3. Contrasts in phylotype abundances between Southern and Northern microbiome clusters.

a, Silhouette scores for membership assignment to either of the two main microbiome types, cluster 1 (Southern) and cluster 2 (Northern). For each cluster, number of individuals and average distance between a sample and members of the other cluster is indicated. b, Differential abundance of phylotypes between Southern and Northern microbiome clusters. y-axis shows the log₂(Fold Change) for the relative abundance difference of a phylotype between clusters. Bold points indicate significance with an FDR ≤ 0.01.