Zur Ökologie der Arthropodenfauna einer Stadtlandschaft und ihrer Umgebung II. Pflanzengallen und Pflanzenminen

The distribution of 17 dominant gall-inducing arthropods and 12 leaf miners on woody plants was analysed in the city of Kiel and surrounding habitats. The number of species and the diversity of the fauna in the two landscapes did not differ very much.Pemphigus bursarius, Schizoneura ulmi undStigmella argentipedella preferred trees in the city. In the city predominated plant parasites that hibernate on their host plant, while species overwintering in the litter on the ground or in the soil were suppressed. Important habitat factors may be mechanical perturbations near the ground (removal of leaf litter, pavement on the ground, trampling, digging of the soil). The number of species declined with decreasing size of the habitat islands (wood — bushes, hedges — individually growing trees or groups of trees on grassland — road trees), the species hibernating in the vegetation layer were favoured.