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Microplastics, estrogens & Co: Ship expedition for the first time investigates “new” pollutants in the Indian Ocean

On July 16, 2024, the German research vessel SONNE starts a three-week expedition to previously little-studied regions of the Indian Ocean between Singapore and Mauritius under the lead of the Leibniz Institute for Baltic Sea Research Warnemünde (IOW). The aim is to determine the extent of human-induced environmental stress and, for the first time, to enable a risk assessment for this region. Newly emerging pollutants such as microplastics, artificial estrogens and polycyclic aromatic hydrocarbons are in focus.

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Energy crisis in Baltic cod and co.: How eutrophication and climate change alter food webs in the Baltic Sea

The eastern Baltic cod stock is in crisis since years. Despite historically low fishing pressure, it is not recovering. A conclusive explanation for this is still lacking. Scientists from the Leibniz Institute for Baltic Sea Research Warnemünde and the Thünen Institute of Baltic Sea Fisheries now proved for the first time that the food web for cod has lengthened in Baltic Sea regions with large-scale blooms of filamentous blue-green algae, which increasingly occur due to eutrophication and climate change.

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From knowledge to action: “10 Must Knows” as a guide to preserving biodiversity

From as yet undiscovered biodiversity to resilient forests and the impact of food consumption on nature: 64 experts have now published their knowledge and recommendations in the form of “10 Must Knows from Biodiversity Science” for 2024. The Leibniz Research Network Biodiversity's new report provides policymakers and society with concrete ways to effectively conserve and sustainably use biodiversity at the local, national, and European levels and thereby also mitigate climate change.

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Traces of Stone Age hunter-gatherers discovered in the Baltic Sea

In 2021, geologists discovered an unusual row of stones, almost 1 km long, at the bottom of Mecklenburg Bight. The site is located around 10 kilometres off Rerik in 21 metres water depth. The approximately 1,500 stones are aligned so regularly that a natural origin seems unlikely. A team of researchers from different disciplines now concluded, that Stone Age hunter-gatherers likely built this structure around 11,000 years ago to hunt reindeer. The finding represents the first discovery of a Stone Age hunting structure in the Baltic Sea region.

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Strong saltwater inflow into the Baltic Sea detected

A large influx of saltwater into the south-western Baltic Sea is currently being detected. The autonomous measuring station operated by the IOW at the Darss Sill has been measuring a strong inflow of salty water throughout the water column since 20.12.2023, which is a comparatively rare occurrence. Over Christmas day, it will become clear whether the inflow is similar in scale to the major saltwater intrusion in 2014. Saltwater inflows are accompanied by oxygen-rich water that could aerate oxygen-poor, deeper basins in the Baltic Sea, which in turn prevents the formation of toxic hydrogen sulphide.

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News

TRR 420: DFG funds new Collaborative Research Centre

On May 28, 2025, the German Research Foundation (DFG) approved funding for the Collaborative Research Centre / Transregio (TRR) 420 “CONCENTRATE”. Headed by the universities of Greifswald and Bremen, the researchers in the consortium are investigating sugar polymers from marine algae and how they help to protect the climate. The IOW is involved with a partial project on the role of marine fungi in the transformation of these sugar polymers.

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Dr. Kristin Beck
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Dr. Matthias Premke-Kraus
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