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On 2 March 2023, an international team of researchers raised concerns about the impact of Russia's war of aggression on Ukraine's freshwater resources, water infrastructure and environment. Now, with the destruction of the Kakhovka Dam on 6 June 2023, the worst feared scenario has become a reality. In a joint statement, Dr Oleksandra Shumilova of IGB and Professor Klement Tockner, Director of the Senckenberg – Leibniz Institution for Biodiversity and Earth System Research (SGN), stress the serious consequences of this ecological disaster.

Taxonomy, or the identification of animal and plant species, can be very time-consuming, especially when a large number of objects are being analized. For example, scientific studies on the global decline of insects are often challenging from a taxonomic point of view. Molecular methods can now replace the human eye in identifying species. For the first time, researchers from the Biological Station Doñana (CISC) in Spain, with the participation of the IGB, have compared the efficiency of conventional and molecular methods using non-biting midges.

Submerged macrophytes are declining in many shallow lakes around the world, with more algae and free-floating plants taking their place. But an opposite trend is also emerging: water bodies with improved water quality are increasingly experiencing a mass growth of aquatic plants. Given that these plants perform many important ecosystem functions, careful management is required. 

On 8 May 2023, around 2,000 juvenile fish will be stocked near Stützkow. The original plan was to release the fish in the autumn of 2022, but this was not possible due to the man-made environmental disaster on the river. Now, the partners involved are making a new attempt and sending a signal for better protection of our river habitats. 

A chronicle of an environmental disaster on the River Oder: Images of huge quantities of dead fish – covering all species and sizes – shocked the German, Polish and international public in August 2022. IGB researchers set about tracking down the causes. IGB was the first institution to determine that the disaster was definitely man-made.

Sophia Kimmig spends half her day coordinating the IGB project "AuBe", which develops insect-friendly lighting concepts. The other half of her day is spent writing about the night. Her book "Lebendige Nacht" (Living Night) has just been published – about the wonders of a world we sleep through.

Ensuring clean water supply for all people and conserving life below water are among the global SDGs. However, almost all of the Earth's waters are impacted, if not clearly altered, by human use. That is why many initiatives are currently being taken to restore peatlands, flowing waters and their floodplains, lakes and other stagnant waters. Researchers at IGB are exploring how best to go about this.

Freshwater biodiversity is declining at alarming rates. In a large-scale effort, a research team led by IGB and the Humboldt Universität zu Berlin (HU) in cooperation with angling clubs, has conducted whole-lake experiments in 20 lakes to improve ecological conditions. Habitat improvements were the most effective means to enhance fish populations, whereas fish stocking completely failed. The study published in the journal Science emphasizes the importance of restoring habitats and improving natural ecosystem processes, which benefits fish populations, conservation and fisheries.