Consumption of silicic acid below the euphotic zone by sedimenting diatom blooms in the Barents Sea

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Abstract
Massive sedimentation of spring phytoplankton blooms occurs in the Barents Sea as in many other shelf sea environments. Associated with this sedimentation there is a large decrease in concentration of dissolved shcic acid below the nitracline. This decrease is apparently related to resting spore formation of the dominant &atom species Chaetoceros socids. The deep shcic acid consumption seems to be a regular and extensive phenomenon which results in a vertical separation of the shcic acid gradient from the nitracline. This d disfavour further growth of diatoms during the summer season due to reduced upward transport of silicic acid by vertical mixing

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