Samples clustering by PCoA.

Abstract

<p>All PCoA plots were first constructed on the basis of unweighted UniFrac distance (see the panel at the top left). Then the points in PCoA plots were weighted by the relative abundances of the top 12 root caries-associated species and top 12 health-associated species of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0117064#pone.0117064.g005" target="_blank">Fig. 5</a>.</p