Soil zoology I: arthropod communities in open landscapes of former brown coal mining areas

In different habitat types of the former coal mining area of Lower Lusatia, distribution and abundance of species of various arthropod groups was studied as to the colonization dynamics and the formation of community patterns. Heteroptera, Auchenorrhyncha, different groups of Coleoptera, Araneida, and Orthoptera were included in the study. In total, about 850 species were captured by pitfall trapping and sweepnet sampling. A detailed analysis of species-environment-relations was performed by means of gradient and eigenvector analysis (DCA, CCA). It is shown that colonization of bare sand habitats, pioneer vegetation with ruderal herbs, short grass prairie with Corynephorus and xerophytic herbs, tall grass prairie with Calamagrostis, and shrubs takes place rather quickly. In all the analysed habitats an adequate degree of the colonization was attained by the studied groups. Both the formation of patterns of species assemblages and population dynamics in upper layers of vegetation mainly depend on the patterns of plant communities and vegetation architecture. In lower layers micro-climatic conditions as well as abiotic soil parameters were shown to be of special importance. Differences of community patterns between predators and mainly phytophagous arthropod groups were discussed.