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.
The edge width and colour (red: positive and blue: negative) are proportional to the correlation strength. The node size is proportional to the mean abundance in the respective population.
