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Irrespective of variable environmental settings in estuaries, the quality of organic particles is an important factor controlling microbial processes that facilitate a reduction of land-derived nitrogen loads to the open sea. Through the interplay of biogeochemical processing, geomorphology, and hydrodynamics, organic particles may function as a carrier and temporary reservoir of nitrogen, which has a major impact on the efficiency of nitrogen load reduction.
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BG | Articles | Volume 16, issue 18
Biogeosciences, 16, 3543–3564, 2019
https://doi.org/10.5194/bg-16-3543-2019
Biogeosciences, 16, 3543–3564, 2019
https://doi.org/10.5194/bg-16-3543-2019

Research article 19 Sep 2019

Research article | 19 Sep 2019

Particulate organic matter controls benthic microbial N retention and N removal in contrasting estuaries of the Baltic Sea

Ines Bartl et al.

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Ask, J., Rowe, O., Brugel, S., Strömgren, M., Byström, P., and Andersson, A.: Importance of coastal primary production in the northern Baltic Sea, Ambio, 45, 635–648, https://doi.org/10.1007/s13280-016-0778-5, 2016. 
Asmala, E., Carstensen, J., Conley, D. J., Slomp, C. P., Stadmark, J., and Voss, M.: Efficiency of the coastal filter: Nitrogen and phosphorus removal in the Baltic Sea, Limnol. Oceanogr., 62, S222–S238, https://doi.org/10.1002/lno.10644, 2017. 
Baer, S. E., Connelly, T. L., Sipler, R. E., Yager, P. L., and Bronk, D. A.: Effect of temperature on rates of ammonium uptake and nitrification in the western coastal Arctic during winter, spring, and summer, Global Biogeochem. Cy., 28, 1455–1466, https://doi.org/10.1002/2013GB004765, 2014. 
Bartl, I., Liskow, I., Schulz, K., Voss, M., and Umlauf, L.: River plume and bottom boundary layer – Hotspots for nitrification in a coastal bay?, Estuar. Coast. Shelf Sci., 208, 70–82, https://doi.org/10.1016/j.ecss.2018.04.023, 2018. 
Bear, J.: Dynamics of fluids in porous media, American Elsevier Pub. Co, New York, NY, 1972. 
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Short summary
Irrespective of variable environmental settings in estuaries, the quality of organic particles is an important factor controlling microbial processes that facilitate a reduction of land-derived nitrogen loads to the open sea. Through the interplay of biogeochemical processing, geomorphology, and hydrodynamics, organic particles may function as a carrier and temporary reservoir of nitrogen, which has a major impact on the efficiency of nitrogen load reduction.
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