A research team led by the IOW was able to revive dormant stages of algae that sank to the bottom of the Baltic Sea almost 7,000 years ago. Despite thousands of years of inactivity in the sediment without light and oxygen, the investigated diatom species regained full viability. The study, recently published in The ISME Journal, was carried out as part of the Leibniz Association-funded collaborative research project PHYTOARK.
Press Release Archive
After more than 30 years, the International Baltic Earth Secretariat (IBES), which supports research and other science activities of the Baltic Earth research network, is handed over from the Helmholtz-Zentrum Hereon to two prominent oceanographic institutes at the Baltic Sea: The IOW and the Institute of Oceanology, Polish Academy of Sciences in Sopot, Poland (IO PAN).
IOW Director Oliver Zielinski becomes a member of the German Science and Humanities Council (WR)
Oliver Zielinski, Director of the IOW and Professor of Earth System Research at the University of Rostock, was appointed to the German Science and Humanities Council (WR) on February 1, 2025, by Federal President Frank-Walter Steinmeier on the joint recommendation of the German Research Association, the Max Planck Society, the German Rectors' Conference, the Helmholtz Association, the Fraunhofer Society, and the Leibniz Association.
The IOW has been collecting physical, chemical and biological Baltic Sea data for many decades. As of this year, the centrepiece of the IOW's long-term observation programme – the annual monitoring ship expeditions – has been officially recognised as a project of the United Nations (UN) “Decade of Ocean Science for Sustainable Development 2021 – 2030”.
How sulphur affects the carbon cycle of subtropical seagrass meadows: New findings from Florida Bay
Seagrass meadows have an important climate protection function due to their long-term carbon storage potential. An international research team led by the IOW has now been able to show that seagrass beds have a stronger influence on the carbon and sulphur cycling in subtropical coastal areas than previously thought. Of particular interest is the important role of sulphur, which stabilises organic carbon, regardless of whether it is sequestered in the calcareous sediments of subtropical seagrass meadows or remains in dissolved form.
Understanding the causes of changing humidity and precipitation in the earth's past is crucial for better assessments of the planet’s future hydroclimate changes through improved modelling. A research team led by the IOW has now for the first time analysed 50,000 years of mid-latitude hydroclimate of the South-East Pacific using special moisture related indicators in marine sediment cores. The most important result is that natural variations in the earth's orbital parameters exert a decisive influence.
Marine heatwaves in the Baltic Sea: IOW researchers investigate causes and effects
Marine heatwaves – periods in which the upper water layers in the sea temporarily become exceptionally warm – are occurring with increasing frequency worldwide. Recent studies by the IOW have now confirmed this trend also for the Baltic Sea.
Effects of bottom trawling: IOW leads large Baltic Sea field experiment with four research vessels
On July 16, 2024, a 19-day research cruise will start in the Baltic Sea led by the IOW to investigate the impact of bottom trawling on the seabed and the organisms living there. In addition to the IOW research vessel ELISABETH MANN BORGESE, three more research vessels from other institutions are involved in the large-scale bottom trawling simulation experiment near Warnemünde.
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.
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.