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.
A USGS wetland scientist (GLSC; Ann Arbor, Michigan) counts the number of invasive Phragmites australis stems within a sampling quadrat in an effort to provide information about various control strategies used to manage the plant. Photo credit: Taaja Tucker-Silva, USGS.
Public Domain.
