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.
Species richness estimates for the V1V2 (a), V3 (b), V4 (c), and V6 (d) SSU rRNA gene regions. Full and enlarged rarefaction curves are displayed for each region of the SSU rRNA gene. Operational taxonomic units (OTUs) are clustered at 97 % similarity. The wide gray line in the enlarged rarefaction curves represents 95 % confidence intervals for the clone library species richness predictions
