Some Recent Publications Muggli, D.L., M. Lecourt and P.J. Harrison. Effects of iron and nitrogen source on the sinking rate, physiology and metal composition of an oceanic diatom from the subarctic Pacific. Mar. Ecol. Prog. Ser. 132: 215-227 (1996). Waite, A, PA Thompson and PJ Harrison. Does energy control sinking rates of marine diatoms? Limnol. Oceanogr. 37, 468-77 (1992). Antia, N.J., P.J. Harrison and L. Oliveira. The role of dissolved organic nitrogen in phytoplankton nutrition, cell biology and ecology. Phycologia 30, 1-89 (1991). Doucette, G.J. and P.J. Harrison. Some effects of iron and nitrogen stress on the red tide dinoflagellate. Mar. Ecol. Prog. Ser. 62, 293-306 (1990). Harrison, P.J., J.S. Parslow and H.L. Conway. Determination of nutrient uptake kinetic parameters: A comparison of methods. Mar. Ecol. Prog. Ser.52, 301-312 (1989). Harrison, P.J., P.W. Boyd, D.E. Varela, S. Takeda, A. Shiomoto, T. Odate. Comparison of factors controlling phytoplankton productivity in the NE and NW Subarctic Pacific gyres. Yin, K., P-Y. Qian, J.C. Chen, D.P. Hsieh and P.J. Harrison. Dynamics of nutrients and phytoplankton biomass in the Pearl River Estuary and adjacent wasters on Hong Kong during summer: preliminary evidence for phosphorus and silicon limitation. Mar. Ecol. Prog. Ser. 194: 295-305 (2000).