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Verantwortlich
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Publisher: Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) in the Forschungsverbund Berlin e.V. ; Responsible authors: Stella Berger, Jörn Gessner, Jan Köhler, Karla Münzner, Jens Nejstgaard, Martin Pusch, Matthias Stöck, Christian Wolter, Sven Würtz ; Editing: Julia Walter
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Abstract/Summary
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In July and August 2022, a man-made environmental disaster occurred in the in the Oder River: a mass die-off of fish, mussels and snails that started in the Polish section of the Oder and then continued downstream until it reached the border Oder. Researchers estimate that up to 1,000 tonnes of fish were lost. The immediate cause of their death was a toxin-producing (planktonic) brackish water alga, scientifically known as Prymnesium parvum, which was able to grow en masse due to high salinity, high solar radiation, and low water flow. The unicellular alga Prymnesium parvum belongs to the algae group of haptophytes. It is often referred to as ”golden alga” in publications, although this name is also used as a collective term for other groups of algae with similar pigmentation. At present, many questions relating to this alga, in particular its growth dynamics and toxicity, have not yet been scientifically clarified or completely understood. As part of the special investigation programme ODER~SO, several sub-projects dedicated to research on Prymnesium and its effects on other aquatic organisms are conducted at the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB). Amongst others, the work is aimed at developing an early warning system for mass developments of Prymnesium. The special investigation programme is supported by the Federal Agency for Nature Conservation (BfN) with funding from the Federal Ministry for the Environment, Nature Conservation, Nuclear Safety and Consumer Protection (BMUV). This IGB Fact Sheet summarises the current state of scientific knowledge on the toxic alga Prymnesium parvum in the Oder River.
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Hinweis
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With the exception of images and illustrations, the content of this document is licensed under Creative Commons BY-NC 4.0 Germany. (https://creativecommons.org/licenses/by-nc/4.0/deed.de)
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“Research for the future of our freshwaters” is IGB’s guiding principle. This involves giving objective and evidence-based information and advice to policymakers, authorities, associations, industry, educational institutions and the public. Within the institute’s publication series called IGB Outlines, which includes the IGB Fact Sheet, IGB disseminates evidence-based information to the public free of charge. Responsibility for the content of the publication rests with the respective authors. It is generally permitted to disseminate the complete IGB Fact Sheet. If you quote from the document in other publications and formats, we would be interested in hearing about it.
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