Biochemical Changes of Sedimented Matter in Sediment Trap in Shallow Coastal Waters

概要

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Decomposition, carbon uptake and biochemical changes of sedimented matter, which was mainly composed of phytoplankton cells and fecal pellets of zooplankton, collected by sediment traps were examined both in situ and in laboratory experiments in order to evaluate the distorting effect upon actual quantities and qualities of sedimented matter during collection. In situ carbon uptake had negligible effect on gross sedimentation even if a trap was suspended in shallow waters (13 m) in Saanich Inlet, B.C., Canada, due to poor penetration of solar radiation and shading effects by trap. However, decomposition rate gave a significant effect, showing a considerable loss against sedimentation rate.It was suggested to select a suitable suspension period of sediment trap in order to minimize distorting effects. It was also recommended to use preservatives to inhibit biochemical processes for a long term suspension of trap.
日本プランクトン学会,農林水産研究情報センターの論文