||Geradflügler (Dermaptera, Blattoptera, Saltatoria) und ihre Mobilität im Kronendach eines mitteleuropäischen Mischwaldes - Beobachtungen aus einer Krangondel|
||Roman Asshoff, Erwin Amstutz|
||Articulata 19: 205-215|
The Orthopteran fauna of a representative Central European deciduous forest canopy is described using the Swiss Canopy Crane (SCC) at Hofstetten (canton Solothurn, Switzerland). A total of seven species (Chelidurella guentheri, Ectobius sylvestris, Barbitistes serricauda, Leptophyes punctatissima, Meconema meridionale, Meconema thalassinum, Tetrix subulata), nymphs as well as adults, were found on different tree species. Most Orthopteran species were observed on Carpinus betulus, Quercus sp. and Tilia platyphyllos, with significantly less abundance on Fagus sylvatica. The most abundant Orthoptera found was M. thalassinum, followed by M. meridionale, C. guentheri, and B. serricauda. We did not find a significant correlation between tree height and grasshopper abundance, suggesting that bush-crickets are not bound to a certain canopy area. A different distribution in the canopy of males and females of Meconema sp. during the vegetation period suggests that there is a sex-specific mobility. Stable isotope (δ¹³C) studies revealed that there is a highly significant correlation between Meconema L1/2-larvae with the leaf tissue on which the buch-cricket was found, suggesting that young larvae of Meconema and their prey are not very mobil. This correlation vanished when comparing leaf tissue with adult Meconema individuals. Hence, we conclude, that Meconema imagos have a certain horizontal mobility in a forest canopy while larvae stay on the trees where they hatched.
||Roman Asshoff: email | webpage|
||The Swiss Canopy Crane Project (SCC)|