出版社：Arbeitsgemeinschaft Forstliche Standorts- und Vegetationskunde (AFSV)
摘要：The habitat requirements of most Aradidae and the decisive factors that
influence their occurrence are still poorly understood. To reduce this lack of
knowledge a standardised survey of Aradidae in two large beech forest areas of
Bavaria (northern Steigerwald and High Spessart) was conducted. The following
hypotheses were tested: 1) With increasing ‘habitat tradition’ (temporal
continuity), population densities of Aradidae increase, 2) Increasing dead wood
supply supports higher abundance of Aradidae, 3) There are key structures for
particular species with respect to type of dead wood, diameter and exposure to
sunlight, and 4) The occurrence of particular fungi species determines the
occurrence of Aradidae. In our study, Aradidae were sampled in point sample
plots by flight-interception traps and time-standardised hand collection. To
analyse specific habitat requirements additional sampling was performed to
increase the sample size. Four species of Aradidae were observed in the two
forest areas: Aneurus avenius, Aradus betulae, A. conspicuus and A.
depressus. The results demonstrate that all species have different and
specific habitat requirements. Especially for A. betulae ‘habitat
tradition’ of standing dead wood of large dimensions infested by Fomes
fomentarius seems to be crucial. Hence, A. betulae was only observed in
the Spessart and only at the sites with ‘habitat tradition’.
