Invasive species

After environmental degradation, invasive alien species are considered the second greatest threat to biodiversity worldwide. They are now responsible for the extinction of over 60 per cent of all animal and plant species. These species are also becoming an increasing problem in Germany.

The exhibition is dedicated to 26 of these species and explains why some of them have to be removed from the wild regionally in order to protect species that are already endangered. This applies above all to the charismatic raccoon: It is perceived by many people as a likeable animal, but for scientists it is a serious threat to local biodiversity.
A fact check is intended to help put the emotional debate surrounding the predator on a sound footing.
Another cause for concern is the explosive proliferation of the invasive quagga mussel in the pre-Alpine lakes. It filters plankton at the base of the food pyramid so efficiently that entire species communities are jeopardised. Science has not yet found a remedy. This also applies to invasive crayfish species, some of which taste good, such as the "Isar lobster", but other crayfish are described by scientists as "biological nuclear bombs".

An exhibition by Jürgen Oeder.

Last edited on 05.11.2025