My main research interests are in the molecular ecology and the biogeochemistry of marine environments, with special focus on coastal sediments. In contrast to many other locations, are coastal sediments subject to intensive advective porewater flow as they generally contain larger proportions of sand grains, making them more permeable. Electron acceptors and donors which are flushed in and out are thereby causing changing redox potentials in the upper sediment layers of these environments. Microbial communities living in these physically mixed sediments are known to be very active in remineralizing organic matter. I am interested in monitoring the biogeochemistry and microbial activity in these environments and in simulated laboratory approaches e.g. in flow-through reactors (FTR). In this context, I have a special interest in the cycling of organosulfur compounds, not only as they are involved in local climate changing events by promoting cloud formation (DMS), but also as they might play an interesting role in the microbial energy metabolism under changing redox conditions.