Fig. 2
PCoA of female uropygial gland, female brood patch, male uropygial gland, and male brood patch bacterial communities based on weighted UniFrac dissimilarity. Green circles represent DAB2 heterozygous individuals, blue squares represent DAB2 homozygous individuals, and gray triangles represent individuals lacking genotype data. Morphological and genetic factors are represented by arrows, and the length of each arrow is proportional to the explanatory power of each variable. Female wing chord length explained 50% of variation in brood patch bacterial community structure (R 2 = 0.500, p = 0.024, n = 14). DAB2 homozygosity explained 72% of variation in male uropygial gland community structure (weighted UniFrac pseudo-F = 1.859, p = 0.015, n = 8), although sample size was small for this analysis. Wing chord was too small to represent for female uropygial gland analysis