Natural microbiota in N. vectensis vary according to season.

(A) PCoA (based on Jaccard metric, sampling depth = 5,000) illustrating similarity of bacterial communities based on sampling month; (B) alpha-diversity comparisons between sampling months (max rarefaction depth = 5,000, num. steps = 10), differences were tested through Kruskal–Wallis test (not significant); (C) relative abundance of main bacterial groups among different sampling months. Underlying data can be found in S1 Data.