1887

Abstract

SUMMARY: Lake Geneva is a large, holomictic, eutrophic lake with a maximum depth of about 300 m. The sediments in the central basin have a pillow-like appearance. The soft elevations containing the major portion of the recently sedimented detritus are separated by trenches of 5 to 15 cm depth in which the top sediment layers seem to be missing. Bottom-dwelling fishes () prefer the trenches as their habitat and might partly be responsible for the turbation of the trench sediment layers. Thus, within distances of 10 to 30 cm two sediment types can clearly be distinguished. They differ with respect to morphology and chemical stratification. Concentration depth profiles of nitrate, manganese(II), iron(II), sulphate, and methane dissolved in the interstitial water reveal the location within the sediment of microbially catalysed redox processes. The redox transition zone (RTZ) from aerobic to anaerobic is located only a few millimetres below the sediment surface in the pillow sediments, which contain the bulk of the organic detritus. The RTZ is at a depth of approximately 6 cm in the trench sediments, which are poor in oxidizable organic matter. The same thermodynamic sequence of microbially catalysed redox reactions can be observed in both sediment types. As a consequence, microbial activities as well as diffusion fluxes of dissolved substances in and out of the different sediment regions vary greatly. This leads to small-scale horizontal differences in the sediment's abilities to supply nutrients to the bottom water, which is probably a major controlling factor for sediment-borne eutrophication of this lake.

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1993-09-01
2021-05-13
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References

  1. Bolliger R., Brandl H., HÖhener P., Hanselmann K.W., Bachofen R. 1992; Squeeze-water analysis for the determination of microbial metabolites in lake sediments-comparison of methods.. Limnology and Oceanography 37:448–455
    [Google Scholar]
  2. Brandl H., Hanselmann K.W. 1985; Microbiology of deep, pelagic sediments in Lake Geneva.. Experientia 41555
    [Google Scholar]
  3. Brandl H., Hanselmann K.W. 1991; Evaluation and application of dialysis porewater samples for microbiological studies at sediment-water interfaces.. Aquatic Sciences 53:55–73
    [Google Scholar]
  4. Brandl H., Hanselmann K.W., Bachofen R. 1990; In situstimulation of bacterial sulfate reduction in sulfate-limited freshwater lake sediments.. FEMS Microbiology Ecology 74:21–32
    [Google Scholar]
  5. Downing J.A., Rath L.C. 1988; Spatial patchiness in the lacustrine environmcnt.. Limnology and Oceanography 33:447–458
    [Google Scholar]
  6. Hakanson L., Jansson M. 1983 Principles of Lake Sedimentation. Heidelberg:: Springer.;
    [Google Scholar]
  7. Hanselmann K.W. 1985; Microbially mediated processes in environmental chemistry (lake sediments as model systems).. Chimia 40:l46–159
    [Google Scholar]
  8. Hertz J., Baltenperger U. 1984; Determination of nitrate and other inorganic anions in salad and vegetables by ion chromatography.. Fresenius̓ Zeitschrift für analytische Chemie 318:121–123
    [Google Scholar]
  9. Lang C. 1989; Effects of small-scale sedimentary patchiness on the distribution of tubificid and lumbriculid worms in Lake Geneva.. Freshwater Biology 21:477–481
    [Google Scholar]
  10. Mann K.H. 1982; Ecology of coastal waters: A systems approach. Studies in Ecology. 8 Blackwell, Oxford.;
    [Google Scholar]
  11. Mortimer C.H. 1941; The exchange of dissolved substances between mud and water in lakes, parts 1 and 2.. Journal of Ecology 29: 280–292
    [Google Scholar]
  12. Mortimer C.H. 1942; The exchange of dissolved substances between mud and water in lakes, parts 3 and 4.. Journal of Ecology 30:147–201
    [Google Scholar]
  13. Overbeck J. 1972; Experimentelle Untersuchungen zur Bestimmung der bakteriellen Produktion im See.. Verhandlungen der Internationalen Vereinigung für Limnologie 18:176–187
    [Google Scholar]
  14. Parsons T.R., Strickland J.D.H. 1962; On the production of particulate organic matter by heterotrophic processes in sea water.. Deep-Sea Research 8:211–222
    [Google Scholar]
  15. Staub E.A. 1981 Diagenese im rezenten Sediment des Vierwald- stättersees und ihre Veränderung durch die Eutrophierung: Tiefen-profile biologisch-chemischer Parameter im Sediment und Poren-wasser. Dissertation ETH Zürich:6841
    [Google Scholar]
  16. Stumm W., Morgan J.J. 1981 Aquatic Chemistry, 2nd edn.. NewYork:: Wiley-Interscience.;
    [Google Scholar]
  17. Sturm M., Zwissig A., Piccard J. 1984; Bio-erosive humpback-structures on the lake floor-an example of sediment/water interface alteration in Lake Geneva.. Abstracts of the 3rd International Symposium on Interactions between Sediments and Water, Geneva.
    [Google Scholar]
  18. Vernet J.P. 1966; Prise de vues sous-lacutres dans le Léman lors de plongées du mésoscaphe ̒Auguste Piccard̓.. Bulletin de la Société Vaudoise des Sciences Naturelles 69:287–292
    [Google Scholar]
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