Fig. 2From: Shades of grey: host phenotype dependent effect of urbanization on the bacterial microbiome of a wild mammalBacterial α-diversity in the squirrel microbiome is negatively correlated with melanism at rural sites (p = 0.02), but positively correlated with melanism among squirrels within city sites (p < 0.01). Solid horizontal lines within violins denote the interquartile rangeBack to article page