Figure 3.

Principle coordinates analyses representing Bray-Curtis (a) and W-Unifrac dissimilarities (b) between six species of Unionidae mussels sampled at the same site on the Sipsey River, AL, USA, across two years. Mussel species were Lampsilis ornata, Obovaria unicolor, Elliptio arca, Fusconaia cerina, Cyclonaias asperata, and Tritogonia verrucosa. The overall effects of species and year on microbiome structure were assessed using separated PERMANOVAs, with results (p < 0.001 for all) indicated on each plot.