Iron-limited diatom growth and Si:N uptake ratios in a coastal upwelling regime.

Presents research which demonstrated that phytoplankton are iron-limited in parts of the California coastal upwelling region. Phytoplankton growth limited by iron availability; Addition of iron to high-nitrate, low-chlorophyll (HNLC) regimes; Silicic acid:nitrate (Si:N) uptake ratios; Diatoms stressed by lack of iron; Si:cell, Si:C and Si:pigment ratios in diatoms; Implications of research.