Biogeosciences
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Articles | Volume 19, issue 13
Articles | Volume 19, issue 13
https://doi.org/10.5194/bg-19-3337-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-3337-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 13
Research article
 | 
15 Jul 2022
Research article |  | 15 Jul 2022

Modelling the effects of benthic fauna on carbon, nitrogen and phosphorus dynamics in the Baltic Sea

Eva Ehrnsten, Oleg Pavlovitch Savchuk, and Bo Gustav Gustafsson

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Latest update: 28 Oct 2025
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Short summary
We studied the effects of benthic fauna, animals living on or in the seafloor, on the biogeochemical cycles of carbon, nitrogen and phosphorus using a model of the Baltic Sea ecosystem. By eating and excreting, the animals transform a large part of organic matter sinking to the seafloor into inorganic forms, which fuel plankton blooms. Simultaneously, when they move around (bioturbate), phosphorus is bound in the sediments. This reduces nitrogen-fixing plankton blooms and oxygen depletion.
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