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.
Means of selected limnological variables for each group of sites. RSh corresponds to shallow river sites (depth <1 m); R, deeper river sites (depth >1 m); PS, plume surface; P4M, plume at 4 m depth (brackish water). Circles correspond to individual values, and error bars are SD. n = 3.
