A method is described for the incubation of undisturbed sediment cores under in situ conditions with the addition of low concentrations of 14C-glucose. Data are presented for respiration, gross uptake and actual uptake rate of glucose by bacteria in sandy, wave-washed beaches of the Baltic Sea. On the average, the bacteria respired 8% of the total glucose taken up. The gross uptake measured was between 2.3×10-3 and 6.8×10-3 μg 14C-glucose g sediment-1 (dry weight) h-1 (average 4.7×10-3 μg g-1 h-1). Minima in the gross uptake rate corresponded with maxima in the concentration of natural free dissolved glucose. For the actual uptake rate, however, very similar uptake rates were calculated for the sediments examined (between 1.4×10-1 and 1.9×10-1 μg glucose g-1 h-1, average 1.7×10-1 μg g-1 h-1).
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Publication No. 183 of the “Joint Research Program” at Kiel University (Sonderforschungsbereich 95 der Deutschen Forschungsgemeinschaft).
Communicated by O. Kinne, Hamburg
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Meyer-Reil, L. Uptake of glucose by bacteria in the sediment. Mar. Biol. 44, 293–298 (1978). https://doi.org/10.1007/BF00390892
- Uptake Rate
- Sediment Core