Outlines | IGB Fact Sheet: State of knowledge on the toxic alga Prymnesium parvum in the Oder River

In July and August 2022, a man-made environmental disaster occurred in the Oder River. The immediate cause was a toxin-producing 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.