Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 23
Articles | Volume 22, issue 23
https://doi.org/10.5194/bg-22-7929-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-22-7929-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 23
Research article
 | 
11 Dec 2025
Research article |  | 11 Dec 2025

Bioaccumulation as a driver of high MeHg in the North and Baltic Seas

David J. Amptmeijer, Elena Mikheeva, Ute Daewel, Johannes Bieser, and Corinna Schrum

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Short summary
We integrate bioaccumulation and biotic Hg transformations into a coupled ecosystem–mercury model to assess their effect on marine Hg cycling. Bioaccumulation increases methylmercury levels, especially in productive coastal waters, and alters Hg exchange between the Baltic and North Seas. These results highlight strong ecosystem feedbacks on marine Hg dynamics.
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