Fig. 6
Clustering of samples based on the Bray-Curtis dissimilarities using the average linkage method. Clusters with AU values > 98.5 are highly supported clusters and are indicated on the tree with their respective AU values. Red and blue symbols at the tree tips represent the samples from immune-challenged and non-immune-challenged ants, respectively. Fertile and non-fertile workers are indicated by, respectively, circles and triangles. Samples that share the same letter (a to h) originate from ants belonging to the same colony. The relative abundances (≥0.05) of microbial families are plotted next to the samples. The OTUs which did not have a family assigned were binned in the category “na”