News

A new IGB Dossier shows options for action for policy-makers and authorities at the nutrient-polluted Lake Arendsee.

The largest global assessment of freshwater animals on the IUCN Red List of Threatened Species to date has revealed that 24% of the world’s freshwater fish, dragonfly, damselfly, crab, crayfish and shrimp species are at high risk of extinction, according to an analysis published in Nature today. Migratory fish such as sturgeons suffered these losses decades ago and since then little has improved in terms of water management to protect biodiversity. This is emphasized by Dr. Jörn Gessner, co-author of the study from the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB).

The brackish lagoons around the German island of Rügen in the southern Baltic Sea are known as outstanding fishing areas, especially for large pike. However, pike catches and catch sizes have been declining for several years.  There are many reasons for this: loss of spawning grounds, decline in nutrition, increased natural mortality due to cormorants and other natural predators, climate change and overfishing.

In the vast, open ocean with no place to hide, sardines group together for protection. When they cannot rely on speed to escape, the sardines’ best chance is to outmaneuver the predator altogether. However, predators also seek ways to find weak spots in the group’s defence.

The PONDERFUL project provides a large collection of open resources on how to foster ponds and pondscapes.

The website Hi Knowledge presents a new approach for combining heterogeneous data and information on biological invasions. It also provides innovative tools for finding knowledge quickly and easily.

A new study led by the University of British Columbia (UBC), with contributions from IGB, has revealed alarming results: climate change could lead to an increase in bacterial and fungal infections in cold-blooded animals such as corals, insects and fish. 

Even deep clear water lakes, which are considered particularly valuable ecosystems, can show signs of eutrophication and algae growth - often for no apparent reason. A new study by four researchers from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) now shows that the causes are not always to be found in increasing nutrient inputs from the catchment area or in re-dissolution processes in the deep areas of a lake, but also in the shallower areas up to a water depth of around 20 metres.