1Paul J H. Uptake of organic nitrogen. In : Carpenter E J,Capene D G, eds. Nitrogen in the Marine Environment. New York: Academic Press, 1983. 325-356.
2Hecky R E, Kilham P. Nutrient limitation of phytoplankton in freshwater and marine environments: A review of recent evidence on the effects of enrichment. Linmol Oceanogr,1988,33:796-822.
3Lal D, Lee T. Cosmogenic 32p and 33p used as tracers to study phosphorus recycling in the upper ocean. Nature ,1988,333 : 752-754.
4Lal D, Chung Y, Platt T, et al. Twin cosmogenic radiotracer studies of phosphorus recycling and chemical fluxes in the upper ocean. Limnol Oceanogr, 1988,33:1559-1567.
5Lee T, Barg E, Lal D. Studies of vertical mixing in the Southem Bight with cosmogenic radlonuclides 32p and 7Be.Limnol Oceanogr, 1991,36:1044-1053.
6Waser N A D, Bacon M P, Michaels A F. Natural activities of 32p and 33p and the 32p / 33p ratio in suspended particulate matter and plankton in the Sargasso Sea. Deep-Sea Research Ⅱ, 1996,43:421-436.
7Benitez-Nelson C R, Buesseler K O. Variability of inorganic and organic phosphorus turnover rates in the coastal ocean.Nature, 1999,398: 502-505.
8Waser NAD, Bacon M P . Eposition fluxes of cosmogenic 32p and 33p and variations in the 32p / 33p ratio at Bermuda. Earth and Planetary Science Letters, 1995, 133:71-80.
9Benitez-Nelson C R, Buesseler K O. Measurement of cos -mogenic 32p and 33p activities in rainwater and seawater. Anal Chem, 1988,70:64-72.
10Lal D,Zutshi P K. Radioistopes 32p,7Be,35S in the atmosphere. J Geophys Res, 1960, 65:669-674.
