Biogeosciences
Biogeosciences
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Articles | Volume 19, issue 24
Articles | Volume 19, issue 24
https://doi.org/10.5194/bg-19-5879-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-5879-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 24
Research article
 | 
21 Dec 2022
Research article |  | 21 Dec 2022

Nitrogen isotopes reveal a particulate-matter-driven biogeochemical reactor in a temperate estuary

Kirstin Dähnke, Tina Sanders, Yoana Voynova, and Scott D. Wankel

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Short summary
Nitrogen is an important macronutrient that fuels algal production in rivers and coastal regions. We investigated the production and removal of nitrogen-bearing compounds in the freshwater section of the tidal Elbe Estuary and found that particles in the water column are key for the production and removal of water column nitrate. Using a stable isotope approach, we pinpointed regions where additional removal of nitrate or input from sediments plays an important role in estuarine biogeochemistry.
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