Figure 1. PCoA of the unweighted UniFrac distance as a measure of microbial community structure.

(a) Samples are grouped by the duration of room temperature storage, showing no clustering of samples in five different durations of storage at room temperature. (b) Samples are grouped by individuals, showing apparent separation between these individuals. Samples on the first and second principal coordinates are plotted by nodes. Lines connect samples in the same groups, and colored circles cover the samples near the center of gravity for each group.