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.
Scatter of sites in environmental PCoA ordination plot in each drainage basin. The sites belonging to the low and high heterogeneity site subsets are shown by different symbols. High = high environmental heterogeneity site subset, Low = low environmental heterogeneity site subset.
