Abstract
Continuous cultures of the marine chrysophyte Dunaliella tertiolecta were grown on four nitrogen sources: NO3 NO2−, NH4+, and urea. Alkalinity changes were consistent with a simple stoichiometric model in which OH production is balanced by NO3− and NO2− uptake, H+ production is balanced by NH4+ uptake and no change occurs when the uncharged species urea is assimilated. Neither the influent N concentration nor the growth rate had any effect on the 1:1 stoichiometry between N uptake and alkalinity change. These results preclude the possibility of excretion of an organic acid (e.g. glycolic acid) stronger than carbonic acid. However, excretion of a weak organic acid or a salt of a strong organic acid cannot be ruled out. In general, the results are consistent with the notion that excretion of glycolic acid by healthy marine phytoplankton cells is minimal.
Dates
Type | When |
---|---|
Created | 15 years, 5 months ago (March 27, 2010, 2:03 p.m.) |
Deposited | 1 year, 9 months ago (Nov. 6, 2023, 1:11 p.m.) |
Indexed | 1 month ago (July 26, 2025, 5:27 a.m.) |
Issued | 45 years, 5 months ago (March 1, 1980) |
Published | 45 years, 5 months ago (March 1, 1980) |
Published Online | 21 years, 8 months ago (Dec. 22, 2003) |
Published Print | 45 years, 5 months ago (March 1, 1980) |
@article{Goldman_1980, title={Effect of nitrogen source and growth rate on phytoplankton‐mediated changes in alkalinity1}, volume={25}, ISSN={1939-5590}, url={http://dx.doi.org/10.4319/lo.1980.25.2.0352}, DOI={10.4319/lo.1980.25.2.0352}, number={2}, journal={Limnology and Oceanography}, publisher={Wiley}, author={Goldman, Joel C. and Brewer, Peter G.}, year={1980}, month=mar, pages={352–357} }