Niels A. G. M. van Helmond

The paper investigates microbial methane cycling in eutrophic coastal sediments, finding that methanogenesis dominates over methanotrophy and that a diverse methanogenic community drives methane production.

The paper examines nitrogen dynamics in coastal waters with varying redox conditions, finding that long-term euxinia reduces ammonium removal by inhibiting nitrification.

The paper examines seasonal nitrification dynamics in marine Lake Grevelingen, finding limited nitrification's role in ammonium removal due to stratification and low nitrifier abundance.

The paper examines seasonal changes in methane oxidation by microbial communities in a coastal basin, finding that methane removal remains active even in anoxic conditions, but is reduced during periods of weakened stratification.