1. Organic Geochemistry Group, MARUM‐Centre for Marine Environmental Sciences and Department of Geosciences University of Bremen Bremen 28359 Germany
2. Biology Centre Czech Academy of Sciences, Soil and Water Research Infrastructure Ceske Budejovice CZ‐37005 Czechia
3. Faculty of Science, Department Ecosystem Biology University of South Bohemia Ceske Budejovice CZ‐37005 Czechia
4. Max Planck Institute for Marine Microbiology Bremen 28359 Germany