Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 1
Articles | Volume 23, issue 1
https://doi.org/10.5194/bg-23-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 1
Research article
 | 
05 Jan 2026
Research article |  | 05 Jan 2026

Nitrogen fixation in Arctic coastal waters (Qeqertarsuaq, West Greenland): influence of glacial melt on diazotrophs, nutrient availability, and seasonal blooms

Isabell Schlangen, Elizabeth Leon-Palmero, Annabell Moser, Peihang Xu, Erik Laursen, and Carolin R. Löscher

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Short summary
We explored nitrogen fixation in the Arctic Ocean, revealing its key role in supporting coastal productivity, especially near melting glaciers. By combining molecular data, rate measurements, and environmental analysis, we identified dominant microbes like symbiotic unicellular cyanobacteria and linked high nitrogen fixation to glacial melt. Our findings suggest that climate-driven changes may expand niches for these microbes, reshaping nitrogen cycles and Arctic productivity in the future.
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