, Volume 54, Issue 3, pp 247–255 | Cite as

The production ecology of Stephanodiscus Astraea (Ehrenb.) Grun

  • G. D. Haffner


The production ecology of Stephanodiscus astraea (Ehrenb.) Grun. is discussed with respect to other phytoplankton growths, mixing regimes and nutrient availability. Populations of Stephanodiscus were studied during 1972 and 1973 in an artificially mixed reservoir with a capacity of 3.5 × 107m3. Major nutrients such as soluble reactive phosphates (60–200 µg/1) and nitrates (1–8 mg/1) were not limiting. Large amounts of silicate (approximately 10 mg/1) were utilized to support moderately large populations of S. astraea (1.3 × 107 µm3/ml). Light penetration and mixing regimes strongly affected the periodicity and size of standing crops. It is suggested that heterotrophic production can interact with the mixing environment to influence the production of turbid waters.


Stephanodiscus artificial mixing Wraisbury Reservoir autotrophic versus heterotrophic production 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Chandler, D. C. 1942. Limnological studies of western Lake Erie. II. Light penetration and its relation to turbidity. Ecology, 23, 41–52.CrossRefGoogle Scholar
  2. Evans, J. H. & McGill, S. M. 1970. An investigation of the Coulter Counter in ‘biomass’ determinations of natural freshwater phytoplankton populations. Hydrobiol. 35, 419.CrossRefGoogle Scholar
  3. Evans, J. H. 1972. A modified sedimentation system for counting algae with an inverted microscope. Hydrobio. 40, 247–250.CrossRefGoogle Scholar
  4. Gardiner, A. C. 1941. Silica and phosphorus as factors limiting development of diatoms. J. Soc. Chem. Ind. Lond. 60, 73–78.CrossRefGoogle Scholar
  5. Guillard, R. L. 1962. Salt and osmotic balance. Physiology and Biochemistry of Algae by R. A. Lewin. Academic Press. 529–540.Google Scholar
  6. Haffner, G. D. 1974. Seston distribution and phytoplankton production in a new, eutrophic reservoir subject of artificial mixing. Ph. D. Thesis, University of London England.Google Scholar
  7. Haffner, G. D. & Evans, J. H. 1973. Synoptic sampling and spatial distribution of phytoplankton in a new Thames Valley Reservoir. (Abstract). Br. Phycol. J. 8, 210.Google Scholar
  8. Haffner, G. D. & Evans, J. H. 1974a. Determination of seston size distribution with Coulter Counters A and B, and the two tube technique. Br. Phycol. J. 9, 255–260.CrossRefGoogle Scholar
  9. Haffner, G. D. & Evans, J. H. 1974b. Relation of light penetration to particle distribution in vertically mixed lacustrine environments. Br. Phycol. J. 9, 261–267.CrossRefGoogle Scholar
  10. Happey, C. M. 1970. The effects of stratification of phytoplankton diatoms in a small body of water. J. Ecol. 58, 635–651.CrossRefGoogle Scholar
  11. Lund, J. W. B., Kipling, C. & LeCren, E. D. 1958. The inverted microscope method of estimating algal numbers, and the statistical basis of estimation by counting. Hydrobiol. 11, 143–170.CrossRefGoogle Scholar
  12. Kilham, P. 1971. A hypothesis concerning silica and freshwater planktonic diatoms. Limnol. and Oceanogr. 16, 10–15.CrossRefGoogle Scholar
  13. Mackereth, F. J. H. 1963. Some methods of water analysis for limnologists Freshwat. Biol. Ass. Sci. Pub. No. 21.Google Scholar
  14. Reynolds, C. S. 1973. The seasonal periodicity of planktonic diatoms in a shallow eutrophic lake. Freshwat. Biol. 3, 89–110.CrossRefGoogle Scholar
  15. Ridley, J. E. 1970. The biology and management of eutrophic reservoirs. Proc. Soc. Wat. Treat. Examin. 19, 374–399.Google Scholar
  16. Rodhe, W. 1948. Environmental requirements of fresh water plankton algae. Symp. Bot. Upsal. 10, 3–149.Google Scholar
  17. Steel, J. A. 1972. The application of fundamental limnological research in water supply system design and management. Symp. Zool. Soc. Lond. 29, 41–67.Google Scholar
  18. Ubeleis, I. 1957. Osmotischer Wert, Zucker-und-Harnstoffpermeabilität einiger Diatomeaen. Osterr. Akad. Wiss. Math.naturw. Kl. Sitzber Abt. 1 166, 395–433.Google Scholar
  19. Verduin, J. Comparison of spring diatom crops of western Lake Erie in 1949 and 1950. Ecology, 32, 062–668.CrossRefGoogle Scholar

Copyright information

© Dr. W. Junk b. v. Publishers 1977

Authors and Affiliations

  • G. D. Haffner
    • 1
  1. 1.Lake Systems Unit, Water Resources BranchOntario Ministry of the EnvironmentToronto

Personalised recommendations