During May 2023, we went to Denmark to sample fjord waters at different oxygen concentration from a unique anoxic basin. We performed onboard incubations and experiments with microbes and dissolved organic matter (DOM). This expedition included scientists from six different nationalities (Danish, German, Turkish, French, Australian and Spanish) and the represented research institutions and universities were the Ludwig-Maximilians University (Munich, Germany), the Max Planck Institute for Marine Microbiology (Bremen, Germany) and the Center for Electromicrobiology of Aarhus University (Aarhus, Denmark).

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Thank you to our fantastic collaborators and special thanks to the Mariager Sailing Club for their help in the field!