Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Beta-diversity analysis of the community composition. a Phylogenetic tree and corresponding relative abundance in phylum level of different samples. b Significantly different orders in two groups (P < 0.05). NS1 new samples are high-quality APMs, OS1 old samples are aging low-quality APMs
