Not yet identified a toxic species of algae could have contributed to the mass extinction of fish in the Oder, suspect scientists from the Leibniz Institute of Water Ecology and Inland Fisheries in Berlin. The rbb24 portal informs about this on Wednesday.
For water ecologist Christian Voltaire, according to current knowledge, this is the most likely cause of the catastrophe. With high temperatures and relatively low water levels on the upper Odra in Poland, algae could develop massively. After opening the locks, the toxic algae probably flowed down the Oder. This explains the high oxygen content despite the high temperatures.
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Water analyst Wolf von Tuempling of the Helmholtz Center for Environmental Research in Magdeburg also believes the algae thesis is plausible, but he can imagine other reasons as well, writes the portal. First of all, the high salt content still puzzles researchers. Illegal substance discharges may play a role here.
The head of the Brandenburg / Berlin Angling Association, Lars Dettmann, is not convinced by the algae theory. In his opinion, “someone deliberately or as a result of an accident has thrown into the river system things that have a huge impact.” Algae growth may just be another consequence of this.