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Marine Biology

, Volume 26, Issue 3, pp 193–201 | Cite as

Effect of inorganic phosphorus on the growth rate of diatoms

  • Z. Z. Finenko
  • D. K. Krupatkina-Akinina
Article

Abstract

The effect is studied of different inorganic phosphorus concentrations on changes in growth rates of 7 diatom species isolated from the plankton of the Black Sea. All species examined increase their cell-division rate with increasing phosphorus concentration in the medium. The phosphorus concentrations have been determined above which division rate is not limited by phosphorus content in the medium. The non-limiting concentration amounts to V/V m =0.9. In the species studied, non-limiting concentrations ranged from 1 to 30 μg P/1. The highest values were obtained for relatively large-sized species. The ratio of cell surface to volume tended to be inversely related to the growth-rate-limiting concentration. Minimal values of phosphorus content in cells have been calculated to range from 0.6 to 4.0·10−17 g.at−P/μ−3. Based on a comparison of phosphate levels in the Black Sea with experimentally-derived rate-limiting concentrations, it is concluded that phosphorus does not limit the reproduction rate of phytoplankton in the more productive regions of the Black Sea or in the lower strata of the euphotic zone.

Keywords

Phosphorus Phytoplankton Phosphorus Content Phosphorus Concentration Productive Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • Z. Z. Finenko
    • 1
  • D. K. Krupatkina-Akinina
    • 1
  1. 1.Institute for the Biology of the Southern SeasAcademy of Science of the Ukrainian SSRSevastopolUSSR

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