An official website of the United States government
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.
 Image Number K11196-1 |
Because of their rich diversity and short life cycles, the macroinvertebrates collected in this Mississippi creek by biologists Charles Bryant (left) and Sam Testa are very useful in assessing environmental effects of stream restoration techniques.
Photo by Peggy Greb.
