Fig. 4

Functional diversities were derived from the number and abundances of MEGAN-based EggNOG annotations. Functional richness between a host organisms and b host environmental groups based is displayed, as well as functional differences between hosts (c) and environmental groups (d). Non-metric multidimensional scaling is based on Bray-Curtis distances on the differences in functional composition between the host organisms displayed (c, d; see Table 3). Large symbols indicate the centroid of the respective groups. Functional variation of communities based on pairwise Bray-Curtis distances within host organism groups and environmental groups. Sample sizes for the host taxa are N = 5, except for D. melanogaster gut tissue (N = 10; see Additional file 2: Table S1)