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.
Nutrients (nitrate, phosphate, silicate) at 15 sites (see Fig. 5 legend) on June 15 and September 1, 1994. Northern sites are at the left. Methods are described in refs. 30 and 43. Among-site differences are highly significant (MANOVA; P ≪ 0.0001 with 84,301 df), but trends are not correlated to those of Chl-a (r ≤ 0.5, P > 0.05 in all cases; see Fig. 5).
