1887

Abstract

The distribution and abundance of mat-forming were investigated at a siltdepositing freshwater site in England over a period of 4 years. Maximum growth occurred during April and May and experiments showed that mat buried by fine sediment could regain the surface by gliding movements. The number of trichomes reaching the surface was light-dependent but chemotactic responses were also apparent. Gliding rates of 1–2 μs were recorded and the trichomes moved through the sediment as a left-handed screw with a pitch of 60°. A surface illumination of 1 klx (4 W m) was optimal for mat formation. Light intensities exceeding 2·5 klx produced a photophobic response resulting in lateral trichome migration to regions of lower surface illumination when these were provided. Migration into the sediment was not observed in the surface intensity range 0–10 klx. The onset of light saturation measured by the CO method was 3 klx for , close to the optimum for mat development. Experiments employing CO in the presence of sulphide and absence of oxygen suggested that the organisms were adapted to an aerobic environment.

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1984-04-01
2024-04-27
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References

  1. Castenholz R. W. 1982; Motility and taxes. In The Biology of Cyanobacteria pp. 414–439 Carr N. G., Whitton B. A. Edited by Oxford: Blackwell Scientific Publications;
    [Google Scholar]
  2. Chu S. P. 1942; The influence of mineral composition of the medium on the growth of planktonic algae. Journal of Ecology 30:284–325
    [Google Scholar]
  3. Desikachary T. V. 1968 Cyanophyta New Delhi: Indian Council of Agricultural Research;
    [Google Scholar]
  4. Drouet F. 1968 Revision of the classification of the Oscillatoriaceae. Monograph Academy of Natural Sciences of Philadelphia 15:1–370
    [Google Scholar]
  5. Fuhs G. W. 1973; Cytological examination of blue-green algae. In The Biology of Blue-green Algae pp. 117–143 Carr N. G., Whitton B. A. Edited by Oxford: Blackwell Scientific Publications;
    [Google Scholar]
  6. Geitler L. 1932; Cyanophyceae. In Rabenhorst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz 14 Kolkwitz R. Edited by Leipzig, Germany: Akademische Verlagsgesellschaft;
    [Google Scholar]
  7. Golubic S. 1973; The relationship between blue- green algae and carbonate deposits. In The Biology of Blue-green Algae pp. 434–472 Carr N. G., Whitton B. A. Edited by Oxford: Blackwell Scientific Publications;
    [Google Scholar]
  8. Golubic S., Focke J. W. 1979; Phormidium hendersonii Howe: identity and significance of a modern stromatolite building microorganism. Journal of Sedimentary Petrology 48:751–764
    [Google Scholar]
  9. Mackereth F. J. H., Heron J., Talling J. F. 1978; Water analysis, some revised methods for limnologists. Freshwater Biological Association Scientific Publication no. 36
    [Google Scholar]
  10. Miller R. D., Hoshaw R. W. 1974; Cell width as a taxonomic character with special reference to Zygnema circumcarinatum Czurda. British Phycological Journal 9:145–148
    [Google Scholar]
  11. Nultsch W. 1962; Der Einfluss des Lichtes auf die Bewegung der Cyanophyceen. II. Photokinesis bei Phormidium autumnale. Planta 57:613–623
    [Google Scholar]
  12. Nultsch W., Hellman W. 1972; Untersuchungen zur Photokinesis von Anabaena variabilis Kiitzing. Archiv für Mikrobiologie 82:76–90
    [Google Scholar]
  13. Olson F. C. W. 1950; Quantitative estimates of filamentous algae. Transactions of the American Microscopical Society 59:272–279
    [Google Scholar]
  14. Pentecost A. 1978; Blue-green algae and freshwater carbonate deposits. Proceedings of the Royal Society of London B200:43–61
    [Google Scholar]
  15. Polderman P. J. G. 1980; A key to the Oscillatoria- ceae in Northwest European saltmarshes. Blumea 26:427–437
    [Google Scholar]
  16. Rippka R., Deruelles J., Waterbury J. B., Herdman M., Stanier R. Y. 1979; Generic assignments, strain histories and properties of pure cultures of cyanobacteria. Journal of General Microbiology 111:1–61
    [Google Scholar]
  17. Round F. E., Heaton J. W. 1966; Persistent, vertical migration rhythms in benthic microflora. Journal of Ecology 54:609–615
    [Google Scholar]
  18. Schindler D. W., Schmidt R. V., Reid R. A. 1972; Acidification and bubbling as an alternative to filtration in determining phytoplankton production by the 14C method. Journal of the Fisheries Research Board of Canada 29:1627–1631
    [Google Scholar]
  19. Walter M. R. 1976; Stromatolites. Developments in Sedimentology 20:
    [Google Scholar]
  20. Zimmermann U. 1969; Ökologische und physio- logische Untersuchungen an der planktischen Blaualge Oscillatoria rubescens D. C. unter besonderer Beriicksichtigung von Licht und Temperatur. Schweizerische Zeitschrift für Hydrologie 31:1–58
    [Google Scholar]
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