Figure 1. Location and description of sampling sites.
The figure was composed using Adobe Illustrator CS3 software (www.adobe.com) based on Google Earth (Map data: Google, DigitalGlobe).
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.