A historical record of benthic foraminifera in seasonally anoxic Lake Grevelingen, the Netherlands

Lake Grevelingen is a former branch of the Rhine-Meuse-Scheldt estuary, which was artificially transformed into a salt-water lake by a dam in 1971. This transformation induced profound changes in the biological community of the basin, which have been described as an ecodisaster, with seasonal hypoxia/anoxia occurring in the deepest parts of the lake. Here, we investigate a sediment core sampled in 2012 in the Den Osse Basin (34 m depth) of Lake Grevelingen, recording the last ~50 years and including the transition from an estuary to a salt-water lake. Sediment molybdenum (Mo) concentrations we... Mehr ...