Trawling-induced sediment resuspension reduces CO2 uptake
Peer-Reviewed Publication
Updates every hour. Last Updated: 1-Sep-2025 19:11 ET (1-Sep-2025 23:11 GMT/UTC)
24 April 2025/Kiel. When bottom trawls are dragged across the seafloor, they stir up sediments. This not only releases previously stored organic carbon, but also intensifies the oxidation of pyrite, a mineral present in marine sediments, leading to additional emissions of carbon dioxide (CO2). These are the findings of a new study conducted by the GEOMAR Helmholtz Centre for Ocean Research Kiel. Based on sediment samples from Kiel Bight, the researchers investigated the geochemical consequences of sediment resuspension. Their conclusion: areas with fine-grained sediments, which play a crucial role in CO2 storage in the Baltic Sea, should urgently be placed under protection. The study has now been published in the journal Communications Earth & Environment.
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