Fig. 1

Relative abundances of queen hindgut microbiotas. Color-coded bars represent relative abundance corrected by species-specific 16S rRNA gene copy number. All 40 queen samples binned within each age group (young and old) are arranged in descending C. melissae relative abundance to highlight the difference in C. melissae prevalence between young and old queens. The ‘Other’ category represents the sum of all bacterial taxa that contributed less than 0.5% to the total community abundance