Additional file 16 of Metagenomic insights into the microbial communities of inert and oligotrophic outdoor pier surfaces of a coastal city

Additional file 16: Figure S11. Influence of rarefaction on the surface microbiome compositional differences. Principal coordinate analysis of the rarefied (left) and unrarefied (right) surface microbiomes based on the species-level abundance matrix ordinated by the Bray–Curtis dissimilarity metric. The normal confidence ellipses indicate the confidence level at 95%.