Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 21
Articles | Volume 22, issue 21
https://doi.org/10.5194/bg-22-6727-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-6727-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 21
Research article
 | 
13 Nov 2025
Research article |  | 13 Nov 2025

Reduction of carbon, alkalinity and nutrient fluxes in the southern Baltic Sea caused by dragging of otter trawl nets across the seafloor

Pankan Linsy, Stefan Sommer, Jens Kallmeyer, Simone Bernsee, Florian Scholz, Habeeb Thanveer Kalapurakkal, and Andrew W. Dale

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Short summary
Bottom trawling is a fishing method that disturbs the seafloor and affects marine ecosystems. This study conducted experimental trawling and monitored biogeochemical changes over three weeks. Results showed reduced nutrient and alkalinity fluxes, decreased benthic carbon respiration, and disrupted biogeochemical processes. While the decline in alkalinity had only a minor effect on atmospheric CO2, the study highlights the lasting ecological impacts of bottom trawling.
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