References
- Collos, T. & Slawyk, G., 1976: Significance of cellular nitrate content in natural populations of marine phytoplankton growing in shipboard cultures. — Marine Biol. 34: 27–32.
- Dugdale, R. C. & Goering, J. J., 1967: Uptake of new and regenerated forms of nitrogen in primary productivity. — Limnol. Oceanogr. 12: 196–206.
- Dugdale, V. A. & Dugdale, R. C., 1965: Nitrogen Metabolism in Lakes III. Tracer studies of the assimilation of inorganic nitrogen sources. — Limnol. Oceanogr. 10: 53–57.
- Gersberg, R., Krohn, K., Peek, N. & Goldman, C. R., 1976: Denitrification studies using 13N-labelled nitrate. — Science 192: 1229–1231.
- Goering, J. J., Wallen, D. D. & Nauman, R. M., 1970: Nitrogen uptake by phytoplankton in the discontinuity layer of the eastern subtropical Pacific Ocean. — Limnol. Oceanogr. 15: 789–796.
- Goldman, C. R., 1963: The measurement of primary productivity and limiting factors in freshwater with carbon-14. — In: M. S. Doty (ed.), Proc. Conf. Primary Productivity Measurement, Marine and Freshwater: 103–113. U. S. Atomic Energy Commission, Div. Tech. Inform. Rep. TID-7633.
- Grant, B. R. & Turner, I. M., 1969: Light stimulated nitrate and nitrite assimilation in several species of algae. — Comp. Biochem. Physiol. 29: 995–1004.
- Kamphake, L. J., Hannah, S. A. & Cohen, J. M., 1967: Automated analysis for nitrate by hydrazine reduction. — Water Research 1: 205–216.
- Liddicoat, M. I., Tibbits, S. & Butler, E. I., 1975: The determination of ammonia in seawater. — Limnol. Oceanogr. 20: 131–132.
- Lui, N. S. & Roels, O. A., 1972: Nitrogen metabolism of aquatic organisms. II. The assimilation of nitrate, nitrite and ammonia by Biddulphia aurita. — J. Phycol. 8: 259–264.
- McCarthy, J. J. & Eppley, R. W., 1972: A comparison of chemical, isotopie, and enzymatic methods for measuring nitrogen assimilation of marine phytoplankton. — Limnol. Oceanogr. 17: 371–382.
- Morris, I. & Ahmed, J., 1969: The effect of light on nitrate and nitrite assimilation by Chlorella and Ankistrodesmus. — Physiol. Plantarum 22: 1166–1175.
- Mullin, J. B. & Riley, J. P., 1955: The spectrophotometry determination of nitrate in natural waters, with particular reference to sea water. — Anal. Chem. Acta 12: 464–480.
- Neess, J. C., Dugdale, R. C., Dugdale, V. A. & Goering, J. J., 1962: Nitrogen metabolism in lakes. I. Measurement of nitrogen fixation with N15. — Limnol. Oceanogr. 7: 163–169.
- Solorzano, L., 1969: Determination of ammonia in natural waters by the phenolhypo-chlorite method. — Limnol. Oceanogr. 14: 799–801.
- Steemann-Nielsen, E., 1952: The use of radioactive carbon (C14) for measuring organic production in the sea. — J. Conseil. 18: 117–140.
- Thacker, A. & Syrett, P. J., 1972: The assimilation of nitrate and ammonium by Chlamydomonas reinhardtii. — New Phytologist 71: 423–433.
- Toetz, D. W., 1976: Diel periodicity in uptake of nitrate and nitrite by reservoir phytoplankton. — Hydrobiologia 49: 49–52.