1. Research Group for Marine Geochemistry, Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, 26129 Oldenburg, Germany
2. Magnetic Resonance Spectroscopy, NMR Applications, Bruker BioSpin GmbH, 76287 Rheinstetten, Germany
3. Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), 26129 Oldenburg, Germany