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Dynamics of dissolved silicium and nitrogen-nutrients at low temperature in the Ems-Dollard estuary
Helder, W.; De Vries, R.T.P. (1986). Dynamics of dissolved silicium and nitrogen-nutrients at low temperature in the Ems-Dollard estuary. Neth. J. Sea Res. 20(2-3): 277-284
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
Peer reviewed article  

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Keyword
    Brackish water

Authors  Top 
  • Helder, W.
  • De Vries, R.T.P.

Abstract
    With salinity and natural fluorescence as conservative tracers to discriminate between fresh water contributions from two different fresh water sources (the river Ems and the river Westerwoldse Aa), deviations from conservative behaviour for silicate, ammonia and nitrate during winter conditions (4-6°C) are reported and discussed. For silicate a net removal from overlying water during transport through the estuary of 15% was found. Nitrification in overlying water (260 µmol·m-3· h-1) was the only important process in nitrogen cycling; sediment-water exchange was of no importance during this period.

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