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Oxygen profiles and organic carbon fluxes in Laurentian Trough sediments
Silverberg, N.; Bakker, J.; Edenborn, H.M.; Sundby, B. (1987). Oxygen profiles and organic carbon fluxes in Laurentian Trough sediments. Neth. J. Sea Res. 21(2): 95-105
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Silverberg, N.
  • Bakker, J.
  • Edenborn, H.M.
  • Sundby, B.

Abstract
    Sediment trap samples and undisturbed cores of bottom sediment were obtained during spring and summer from a 350-m-deep site in the Laurentian Trough, Gulf of St. Lawrence, and used to determine the flux of organic carbon concentration profiles close to the sediment-water interface. Oxygen uptake rates by the sediment, calculated from micro-electrode profiles and a one-dimensional molecular diffusion transport model, can only account for 20% of the organic carbon that is mineralized in the sediment. Mechanisms other than molecular diffusion must dominate the transport of oxygen across the sediment-water interface in these deep coastal segments.

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