Figure 3. Forces shaping fungal and bacterial communities.

Principal coordinates analysis (PCoA) of degree of fungal and bacterial community similarity at 14 body sites, based on predominant genera and species. Variation in fungal communities segregated strongly along site location, with feet, head, and torso sites forming discrete groups (A). Bacterial community structure was more dependent on site physiology (B). Axes that most significantly contribute to variation and their relative length are defined in Figure S10 legend. For fungi, M. restricta (i; ρ = 0.92) and M. globosa (a; ρ = −0.79) are primary and opposing drivers of variation. For bacteria, Propionibacterium (j; ρ = 0.95) contributes to sebaceous site variation, while Corynebacterium (l; ρ = −0.74), and Turicella (q; ρ = −0.56) contribute most heavily for moist sites.