Fig. 6

Microbial structure in relation to O. formigenes colonization. a Centrality of nodes in O. formigenes+ (left) and O. formigenes– (right) networks. The x and y axes represent the normalized node degree and betweenness centrality, respectively. b Natural connectivity is shown as a function of the remaining size of the network. Node removals were ordered by degree (left), or betweenness centrality (middle), or at random (right). c Natural connectivity associated with presence of O. formigenes or with seven other bacterial species as controls. For each category, distribution of natural connectivity was obtained by 100 iterations of network inference with 1000 samples randomly selected per iteration. All comparisons are significant based on Mann–Whitney statistical tests