Figure 1.

The structure of the microbiota across species. Although there can be significant interindividual variation in the composition of the microbiota, broad trends exist within a given species, particularly at the phylum level. Phyla are represented by color, and the relative abundance of the lower taxonomic levels is indicated by font size. This figure was produced with data adapted from Arumugam et al. (2011), Brinkman et al. (2011), Chandler et al. (2011), and Roeselers et al. (2011).