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• Main Authors: Cesauveur Belviso A, Gérard Thouzeau B, Sabine Schmidt C, Marit Reigstad D, Paul Wassmann D, Elena Arashkevich E, Jacqueline Stefels F
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2005
• Subjects: Malangen
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.1101; http://www.rug.nl/research/plant-ecophysiology/plantfysiologie/onderzoek/belviso_et_al_ecss_2006.pdf

In April 1997 and 1998 the significance of sedimentation as a sink for epipelagic dimethylsulphoniopropionate (DMSP) production and as a source for marine sediments was reassessed using a newly designed sediment trap. The behaviour of the traps in immersion was monitored con-tinuously and the collection efficiency was evaluated with 234Th measurements. Net DMS(P) fluxes were corrected for some physical and biolog-ical losses during thewhole sedimentation process providing reliable estimates of gross DMSP fluxes. It is shown that daily losses by sedimentation account for between 0.1 % and 16 % of seawater particulate DMSP (DMSPp) standing stocks, and between 3 % and 75 % of daily DMSPp produc-tion. In the Malangen fjord we observed temporal increases of DMSP production and standing stocks which resulted also in increases of DMSP vertical fluxes and DMS(P) concentrations at the sediment surface. This result illustrates how tight the coupling can be between pelagos and ben-thos, and confirms that DMS(P) concentration in the sediment was a reliable diagnostic indicator of vertical export from overlying waters in Malangen fjord. In Ullsfjord, however, DMS(P) concentrations in the sediment were poorly indicators of Phaeocystis pouchetii export during the early stage of growth of a bloom. The high load of DMS(P) in Balsfjord’s sediments could neither be attributed to local vertical sedimentation nor to short-term lateral advection of fresh DMSP-containing phytoplanktonic material, and provides indication that this tracer sometimes also can