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.
Observed species index (A), Shannon index (B), and Simpson index (C) are plotted for samples grouped by age and health status. The median is depicted by the line inside the box whereas the lowest and highest values observed are represented by the whiskers.
