Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 5
Articles | Volume 23, issue 5
https://doi.org/10.5194/bg-23-1931-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-1931-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 5
Research article
 | 
12 Mar 2026
Research article |  | 12 Mar 2026

Spatial heterogeneity of GHG dynamics across an estuarine ecosystem

Nicolas-Xavier Geilfus, Bruno Delille, Anna Villnäs, and Alf Norkko

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Short summary
Coastal ecosystems strongly influence the global carbon cycle but remain poorly quantified. We measured surface pCO₂, CH₄, and N₂O concentrations in southwest Finland across an estuarine ecosystem. Greenhouse gases concentrations varied with salinity and habitat type. Riverine inputs and mixing with seawater, and primary production shaped greenhouse gases dynamics, emphasizing benthic control as a key yet uncertain driver of coastal carbon fluxes.
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