Figure 11. Dissolved inorganic nutrients measured in surface waters. Phosphate (a) and silicate (b) were plotted as a function of dissolved, combined nitrogen (DIN= NO2+NO3), and phosphate (c) is plotted as a function of silicate. The solid lines indicate the Redfield N:P relationship and other molar relationships (N:Si, Si:P) necessary for balanced cellular synthesis and growth in phytoplankton.
