Abstract
The effects of applied filtration vacuum and incubation time on the release of dissolved organic carbon (DOC) by natural phytoplankton populations dominated by diatoms were examined. The rate of primary production and release of DOC remained reasonably constant during a 5 hour incubation period. The measured release of DOC was found to be quite sensitive to the applied filtration vacuum, ranging from near 2 percent of fixed carbon (neglecting respiration) for gravity-filtered samples to 36 percent for samples filtered at 40 cm Hg vacuum.
Literature Cited
Aaronson, S. 1978. Excretion of organic matter by phytoplankton in vitro.Limnol. Oceanogr. 23:838.
Anderson, G. C., andR. P. Zeutschel. 1970. Release of dissolved organic matter by marine phytoplankton in coastal and offshore areas of the northeast Pacific Ocean.Limnol. Oceanogr. 15:402–407.
Arthur, C. R., andF. H. Rigler. 1967. A possible source of error in the14C method of measuring primary productivity.Limnol. Oceanogr. 12:121–124.
Berman, T. 1973. Modifications in filtration methods for the measurment of inorganic14C uptake by photosynthesizing algae.J. Phycol. 9:327–330.
Choi, C. I. 1972. Primary production and release of dissolved organic carbon from phytoplankton in the western North Atlantic Ocean.Deep Sea Res. 19:731–735.
Fogg, G. E. 1966. The extracellular products of algae.Oceanogr. Mar. Biol. Ann. Rev. 4:195–212.
— 1977. Excretion of organic matter by phytoplankton.Limnol. Oceanogr. 22:576–577.
—,C. Nalewajko, andW. D. Watt. 1965. Extracellular products of phytoplankton photosynthesis.Proc. Roy. Soc. Lond., Ser. B 162:517–534.
Hellebust, J. A. 1965. Excretion of some organic compounds by marine phytoplankton.Limnol. Oceanogr. 10:192–206.
Jüttner, F., andR. Fritz. 1974. Excretion products ofOchromonas with special reference to pyrrolidone carboxylic acid.Arch. Microbiol. 96:223–232.
McKnight, D. M. 1979. Interactions between freshwater plankton and copper speciation. Ph.D. Thesis, Massachusetts Institute of Technology, Cambridge, MA.
Nalewajko, C., T. G. Dunstall, andH. Shear. 1976. Kinetics of extracellular release in axenic algae and in mixed algal bacterial cultures: significance in estimation of total (gross) phytoplankton excretion rates.J. Physicol. 12:1–5.
—, andD. R. S. Lean. 1972. Retention of dissolved compounds by membrane filters as an error in the14C method of primary production measurement.J. Physiol. 8:37–43.
Sharp, J. H. 1977. Excretion of organic matter by marine phytoplankton: Do healthy cells do it?.Limnol. Oceanogr. 22:381–399.
Thomas, J. P. 1971. Release of dissolved organic matter from natural populations of marine phytoplankton.Mar. Biol. 11:311–323.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shifrin, N.S. The measurement of dissolved organic carbon released by phytoplankton. Estuaries 3, 230–233 (1980). https://doi.org/10.2307/1352074
Issue Date:
DOI: https://doi.org/10.2307/1352074