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.
Ecological generalization, or an increase in niche breadth, has been shown to vary consistently with latitude and elevation. Specifically, comparative studies in plant taxa have documented a...
data.gov
An official website of the GSA's Technology Transformation Services