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Heterotrophic activity and carbon flow via bacteria in waters associated with a tidal mixing front
Lochte, K.; Turley, C.M. (1985). Heterotrophic activity and carbon flow via bacteria in waters associated with a tidal mixing front, in: Gibbs, P.E. (Ed.) Proceedings of the 19th European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. pp. 73-85
In: Gibbs, P.E. (Ed.) (1985). Proceedings of the Nineteenth European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. European Marine Biology Symposia, 19. Cambridge University Press: Cambridge. ISBN 0-521-30294-3. 541 pp., meer
In: European Marine Biology Symposia., meer
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Documenttype: Congresbijdrage
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  • Lochte, K.
  • Turley, C.M.
Abstract
    Stratified and mixed waters associated with the tidal mixing front in the western Irish Sea have been investigated with respect to the heterotrophic uptake of (14C)glucose. Throughout spring and summer, glucose turnover rates were closely correlated with the stratification of the water column. They were highest in the surface of the stratified water, particularly during summer. Glucose turnover rates and glucose uptake per bacterial cell were most rapid in the vicinity of the front. Bacterial biomass production in the surface and the bottom of the stratified water mass was obtained by in situ incubations of natural bacterial populations in dialysis bags. Bacterial productivity was four times higher in the surface water than in the water below the thermocline and it was slightly higher than primary production. Comparisons between parallel incubations in dialysis bags and bottles were used in a bioassay approach to assess the amount and flux rate of organic carbon available for bacterial consumption. Removal of bacterial production via grazing may be of importance in the cycling of organic carbon.
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