1887

Abstract

Microbial activity was determined along electrode potential gradients within sediments, and along sediment surfaces in a stratified eutrophic lake. There was evidence of a change from a tricarboxylic acid cycle-based metabolism to a fermentative one with decreasing electrode potential. A more detailed examination of the stratification of the microbial community showed that the activities of enzymes associated with energy metabolism (in this case electron transport) were highest on electrode potential gradients. This was observed within a sediment core on a millimetredepth scale, as well as over several metres at the surface of sediments, on a transect which ran from oxic littoral muds to the anoxic profundal zone. In contrast, microbial hydrolytic enzymes, such as protease and amylase, were most active at the sediment surface, where the highest concentrations of substrates might be expected.

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1979-11-01
2022-01-27
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References

  1. Cappenberg T.E. 1974; Interrelations between sulfate-reducing and methane-producing bacteria in bottom deposits of a fresh-water lake. 1. Field observations. Antonie van Leeuwenhoek 40:285–295
    [Google Scholar]
  2. Collins V.G., Willoughby L.G. 1962; The distribution of bacteria and fungal spores in Blelham Tarn with particular reference to an experimental overturn. Archiv für Mikrobiologie 43:294–307
    [Google Scholar]
  3. Fenchel T.M., Jørgensen B.B. 1977; Detritus food chains of aquatic ecosystems: the role of bacteria. Advances in Microbial Ecology 1:1–58
    [Google Scholar]
  4. Garlichs U.A., Brandau H., Bössmann K. 1974; Histotopochemical determination of metabolic activity of carbohydrate metabolism in plaque from sound and carious enamel. Caries Research 8:234–248
    [Google Scholar]
  5. Gray C.T., Wimpenny J.W.T., Hughes D.E., Rossman M.R. 1966; Regulation of metabolism in facultative bacteria. 1. Structural and functional changes in Escherichia coli associated with shifts between aerobic and anaerobic states. Biochimica et biophysica acta 117:22–32
    [Google Scholar]
  6. Johnston D.W., Cross T. 1976; The occurrence and distribution of actinomycetes in lakes of the English Lake District. Freshwater Biology 6:457–463
    [Google Scholar]
  7. Jones J.G. 1972; Studies of freshwater bacteria: association with algae and alkaline phosphatase activity. Journal of Ecology 60:59–75
    [Google Scholar]
  8. Jones J.G. 1976; The microbiology and decomposition of seston in open water and experimental enclosures in a productive lake. Journal of Ecology 64:241–278
    [Google Scholar]
  9. Jones J.G. 1977; The effect of environmental factors on estimated viable and total populations of planktonic bacteria in lakes and experimental enclosures. Freshwater Biology 7:67–91
    [Google Scholar]
  10. Jones J.G. 1978; The distribution of some freshwater planktonic bacteria in two stratified eutrophic lakes. Freshwater Biology 8:127–140
    [Google Scholar]
  11. Jones J.G., Simon B.M. 1975; An investigation of errors in direct counts of aquatic bacteria by epifluorescence microscopy, with reference to a new method for dyeing membrane filters. Journal of Applied Bacteriology 39:317–329
    [Google Scholar]
  12. Jones J.G., Simon B.M. 1977; Increased sensitivity in the measurement of ATP in freshwater samples with a comment on the adverse effect of membrane filtration. Freshwater Biology 7:253–260
    [Google Scholar]
  13. Jones J.G., Simon B.M. 1979; The measurement of electron transport system activity in freshwater benthic and planktonic samples. Journal of Applied Bacteriology 46:305–315
    [Google Scholar]
  14. Jørgensen B. B. 1977a; Distribution of colorless sulfur bacteria (Beggiatoa spp.) in a coastal marine sediment. Marine Biology 41:19–28
    [Google Scholar]
  15. Jørgensen B. B. 1977b; Bacterial sulfate reduction within reduced micro-niches of oxidized marine sediments. Marine Biology 41:7–17
    [Google Scholar]
  16. Karl D.M. 1978; Distribution, abundance, and metabolic states of microorganisms in the water column and sediments of the Black Sea. Limnology and Oceanography 23:936–949
    [Google Scholar]
  17. Mackereth F.J.H. 1964; An improved galvanic cell for determination of oxygen concentrations in fluids. Journal of Scientific Instruments 41:38–41
    [Google Scholar]
  18. Mortimer C.H. 1941; The exchange of dissolved substances between mud and water in lakes.I and II. Journal of Ecology 29:280–329
    [Google Scholar]
  19. Mortimer C.H. 1942; The exchange of dissolved substances between mud and water in lakes.III and IV. Journal of Ecology 30:147–201
    [Google Scholar]
  20. Overbeck J. 1968; Prinzipielles zum Vorkommen der Bacterien in See. Mitteilungen der Internationalen Vereinigung für theoretische und angewandte Limnologie 14:134–144
    [Google Scholar]
  21. Overbeck J. 1975; Distribution pattern of uptake kinetic responses in a stratified eutrophic lake. Verhandlung der Internationalen Vereinigung für theoretische und angewandte Limnologie 19:2600–2615
    [Google Scholar]
  22. Owens T.G., King F.D. 1975; The measurement of respiratory electron-transport-system activity in marine zooplankton. Marine Biology 30:27–36
    [Google Scholar]
  23. Rinderknecht H., Wilding P., Haverback B.J. 1967; A new method for the determination of α-amylase. Experientia 23:805
    [Google Scholar]
  24. Vosjan J.H., Olanczuk-Neyman K.M. 1977; Vertical distribution of mineralization processes in tidal sediment. Netherlands Journal of Sea Research 11:14–23
    [Google Scholar]
  25. Whitfield M. 1969; Eh as an operational parameter in estuarine studies. Limnology and Oceanography 14:547–558
    [Google Scholar]
  26. Wieser W., Zech M. 1976; Dehydrogenases as tools in the study of marine sediments. Marine Biology 36:113–122
    [Google Scholar]
  27. Wimpenny J.W.T. 1969; Oxygen and carbon dioxide as regulators of microbial growth and metabolism. Symposia of the Society for General Microbiology 19:161–197
    [Google Scholar]
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