Particulate organic carbon flux in the oceans—surface productivity and oxygen utilization

Organic detritus passing from the sea surface through the water column to the sea floor controls nutrient regeneration, fuels benthic life and affects burial of organic carbon in the sediment record1–3. Particle trap systems have enabled the first quantification of this important process. The results suggest that the dominant mechanism of vertical transport is by rapid settling of rare large particles, most likely of faecal pellets or marine snow of the order of >200 μm in diameter, whereas the more frequent small particles have an insignificant role in vertical mass flux4–6. The ultimate source of organic detritus is biological production in surface waters of the oceans. I determine here an empirical relationship that predicts organic carbon flux at any depth in the oceans below the base of the euphotic zone as a function of the mean net primary production rate at the surface and depth-dependent consumption. Such a relationship aids in estimating rates of decay of organic matter in the water column, benthic and water column respiration of oxygen in the deep sea and burial of organic carbon in the sediment record.

[1]  H. Barnes.  Oceanography of the South Pacific, 1972 , 1974 .

[2]  W. Kirchner.  An evaluation of sediment trap methodology , 1975 .

[3]  W. G. Deuser,et al.  Seasonal change in the flux of organic carbon to the deep Sargasso Sea , 1980, Nature.

[4]  W. Zenk,et al.  Sedimentation of particulate matter during a phytoplankton spring bloom in relation to the hydrographical regime , 1978 .

[5]  J. Brun-Cottan.  Stokes settling and dissolution rate model for marine particles as a function of size distribution , 1976 .

[6]  A. Lerman,et al.  Size spectra of biogenic particles in ocean water and sediments , 1975 .

[7]  P. Müller,et al.  Productivity, sedimentation rate, and sedimentary organic matter in the oceans—I. Organic carbon preservation , 1979 .

[8]  J. Trent,et al.  Marine snow: sinking rates and potential role in vertical flux , 1980 .

[9]  J. Ryther.  Photosynthesis and fish production in the sea. , 1969, Science.

[10]  D. Lal,et al.  The oceanic microcosm of particles. , 1977, Science.

[11]  A. Carlucci,et al.  Bacterial utilisation of organic matter in the deep sea , 1976, Nature.

[12]  T. Packard,et al.  Sediment metabolism from the northwest African upwelling system , 1977 .

[13]  F. A. Richards,et al.  VERTICAL DISTRIBUTION OF THE ACTIVITY OF THE RESPIRATORY ELECTRON TRANSPORT SYSTEM IN MARINE PLANKTON1 , 1971 .

[14]  R. Iturriaga,et al.  Bacterial activity related to sedimenting particulate matter , 1979 .

[15]  H. Schrader.  Fecal Pellets: Role in Sedimentation of Pelagic Diatoms , 1971, Science.

[16]  H. Craig.  The deep metabolism: Oxygen consumption in abyssal ocean water , 1971 .

[17]  J. Dymond,et al.  Sediment Trap Experiment on the Gal�pagos Spreading Center, Equatorial Pacific , 1980, Science.

[18]  K. SmithJr..  Benthic community respiration in the N.W. Atlantic Ocean: in situ measurements from 40 to 5200 m , 1978 .

[19]  T. Blackburn,et al.  Distribution of oxygen in marine sediments measured with microelectrodes1 , 1980 .

[20]  J. Ryther,et al.  The annual cycle of primary production in the Sargasso Sea off Bermuda , 1959 .

[21]  C. Yentsch,et al.  Primary Production of Continental Shelf Waters off New York1 , 1958 .

[22]  J. Ryther,et al.  The seasonal and geographical range of primary production in the Western Sargasso Sea , 1959 .

[23]  T. Blackburn,et al.  Oxygen in the Sea Bottom Measured with a Microelectrode , 1980, Science.

[24]  Kenneth W. Bruland,et al.  Fluxes of particulate carbon, nitrogen, and phosphorus in the upper water column of the northeast Pacific , 1979 .