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.
Distribution pies of distinct OTUs (98% similarity threshold) are shown for each site. The sampling sites are described in more detail in Supplementary Table S1 online. The map was generated using GeoMapApp version 2 (http://www.geomapapp.org/).
