Fig. 5.
Total number of sea urchin halos in pH zones. Means ± SEM, n = 3, based on repeated measurements in each site x pH zone in June 2009, May 2010, and October 2010.
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.