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Goutx, Madeleine; Momzikoff, André; Striby, L; Andersen, Valérie; Marty, Jean-Claude; Vescovali, Isabelle (2000): Particulate organic carbon and nitrogen concentrations and fluxes at time series station DYNAPROC. PANGAEA, https://doi.org/10.1594/PANGAEA.738702, Supplement to: Goutx, M et al. (2000): High-frequency fluxes of labile compounds in the central Ligurian Sea, northwestern Mediterranean. Deep Sea Research Part I: Oceanographic Research Papers, 47(3), 533-556, https://doi.org/10.1016/S0967-0637(99)00101-6

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Abstract:
Sinking particles were collected every 4 h with drifting sediment traps deployed at 200 m depth in May 1995 in a 1-D vertical system during the DYNAPROC observations in the northwestern Mediterranean sea. POC, proteins, glucosamine and lipid classes were used as indicators of the intensity and quality of the particle flux. The roles of day/night cycle and wind on the particle flux were examined. The transient regime of production from late spring bloom to pre-oligotrophy determined the flux intensity and quality. POC fluxes decreased from, on average, 34 to 11 mg/m**2/d, representing 6-14% of the primary production under late spring bloom conditions to 1-2% under pre-oligotrophic conditions. Total protein and chloroplast lipid fluxes correlated with POC and reflected the input of algal biomass into the traps. As the season proceeded, changes in the biochemical composition of the exported material were observed. The C/N ratio rose from 7.8 to 12. Increases of serine (10-28% of total proteins), total lipids (7-9 to 14-28% of POC) and reserve lipids (1-5 to 5-22% of total lipids) were noticeable, whereas total protein content in POC decreased (20-27 to 18-7%). N-acetyl glucosamine, a tracer of fecal pellet flux, showed that zooplankton grazing was a major vector of downward export during the decaying bloom. Against this background pattern, episodic events specifically increased the flux, modifying the quality and the settling velocity of particles. Day/night signals in biotracers (POC, N-acetyl glucosamine, protein and chloroplast lipids) showed that zooplankton migrations were responsible for sedimentation of fresh material through fast sinking particles (V=170-180 m/d) at night. Periodic signatures of re-processed material (high lipolysis and bacterial biomass indices) suggested that other zooplankton fecal pellets or small aggregates, probably of lower settling velocities (V<170 m/d), contributed to the flux during calm periods. At the beginning of the experiment, during the development of a prymnesiophyte bloom in the upper layers, the sterol signal with no periodicity enabled us to estimate high particle settling velocities (>=600 m/d) likely related to large aggregate formation. A wind event increased biotracer fluxes (POC, protein, chloroplast lipids). The rapid transmission of surface signals through extremely fast sinking particles could be a general feature of particle fluxes in marine areas unaffected by horizontal advection.
Coverage:
Median Latitude: 43.265227 * Median Longitude: 7.544566 * South-bound Latitude: 43.250890 * West-bound Longitude: 7.514450 * North-bound Latitude: 43.420000 * East-bound Longitude: 7.863333
Date/Time Start: 1995-05-07T05:28:00 * Date/Time End: 1995-06-01T08:06:00
Event(s):
DYNAPROC_076 * Latitude: 43.253990 * Longitude: 7.514450 * Date/Time: 1995-05-07T05:28:00 * Campaign: DYNAPROC * Basis: Le Suroît * Method/Device: CTD/Rosette (CTD-RO)
DYNAPROC_110 * Latitude: 43.252960 * Longitude: 7.519720 * Date/Time: 1995-05-11T22:03:00 * Campaign: DYNAPROC * Basis: Le Suroît * Method/Device: CTD/Rosette (CTD-RO)
DYNAPROC_120 * Latitude: 43.251950 * Longitude: 7.519430 * Date/Time: 1995-05-12T22:05:00 * Campaign: DYNAPROC * Basis: Le Suroît * Method/Device: CTD/Rosette (CTD-RO)
Size:
13 datasets

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Datasets listed in this publication series

  1. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Fluxes of particulate organic carbon and nitrogen at DYNAPROC station. https://doi.org/10.1594/PANGAEA.185223
  2. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_076. https://doi.org/10.1594/PANGAEA.184871
  3. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_110. https://doi.org/10.1594/PANGAEA.184872
  4. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_120. https://doi.org/10.1594/PANGAEA.184873
  5. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_128. https://doi.org/10.1594/PANGAEA.184874
  6. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_137. https://doi.org/10.1594/PANGAEA.184875
  7. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_143. https://doi.org/10.1594/PANGAEA.184876
  8. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_248. https://doi.org/10.1594/PANGAEA.184877
  9. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_257. https://doi.org/10.1594/PANGAEA.184878
  10. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_264. https://doi.org/10.1594/PANGAEA.184879
  11. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_269. https://doi.org/10.1594/PANGAEA.184880
  12. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_278. https://doi.org/10.1594/PANGAEA.184881
  13. Goutx, M; Momzikoff, A; Striby, L et al. (2000): Particulate organic carbon and nitrogen at station DYNAPROC_286. https://doi.org/10.1594/PANGAEA.184882