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Cycling of marine dissolved organic matter. I. An experimental systemZweifel UL, Blackburn N, Hagström Å![]()
ABSTRACT: The degradation of dissolved organic carbon (DOC), together with bacterial growth and mortality, was studied in a multi-stage flow-through system. Particle-free sterile seawater was used as growth substrate and fed into vessels containing bacteria and
viruses with or without flagellates. The residence time spanned from 30 to 1800 h. The rate of net organic carbon consumption decreased 3 orders of magnitude with increasing residence time (from 0.45 to 0.001 µM C h-1). Interestingly, we found
a significantly higher DOC consumption in the presence of flagellates (1.3 to 10 times higher). Viruses were abundant in all culture vessels (1.7 to 6.5
KEY WORDS: DOM · Degradation · Bacteria · Viability · Remineralization · Virus
Published in AME Vol.
11, No. 1
(1996) on August 29
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