Beetle and spider oenoses of salt varnishes in the Seewinkel as a basis for nature conservation work: a quarter of a century later — Final Report 2021

Association Institute for Applied Biology and Environmental Education Highlights: In 2019, the salinity in the upper soil was only one-fifth of the salinity of 1993. The number of individuals in the Spiders in 2019 was 66 % lower than in 1993. Among the spiders, wetland species declined the most. The total number of barrel beetle catches was only slightly reduced; the Beetle Fauna showed however, a strong turnover. A series of typical salt-bottom-bound runetle species of the lake angle, which in the last Throughout the century, all paints were common and in 1993 still in high levels. Numbers of pieces could only be captured in single copies or no more at all to be identified. Degradation tendencies observed in 1993 mainly on the eastern paints; it now also affects the western paints to a large extent. A rapid restoration of the groundwater level ratios appears in order to maintain the Salt paints and their species communities are urgently needed.