Articles | Volume 19, issue 24
https://doi.org/10.5194/bg-19-5879-2022
https://doi.org/10.5194/bg-19-5879-2022
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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Latest update: 28 Mar 2024
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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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