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.
USGS scientist Stephen T. Jackson's research has taken him to a variety of ecosystems across North America, including old-growth longleaf pine savanna of the Gulf Coastal Plain.
Public Domain.
