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.
Detritus samples, including EAM and tray detritus, are represented by open and filled circles, respectively, that denote the values of individual samples. All other symbols represent the average ± SD of source samples.
