Nesting Dynamics of the Digger Wasp Bembecinushungaricus (Hymenoptera: Apoidea: Crabronidae) at theNature Reserve 'in den Sandbergen' near Drosing a. d.March, Lower Austria

摘要

From April to October 2004 activity of the females of the digger wasp Bembecinus hun-garicus FRIVALDSKY, 1877 was investigated at the Nature Reserve in den Sandbergen"near Drosing a. d. March, Lower Austria. After extensive restoration management torestore the original condition in 2003 a total of over 1000 burrows on 10 m~2 open sandsurface was registrated. We could show a relation between the temperature in burrow-depth to the numbers of burrows. Additional, the fauna of Hymenoptera: Aculeata (excluding Formicidae) was recorded.37 species could be trapped; 50 percent are endangered species. Most of them werefound at the open sand areas indicating the importance of such rare habitats for spe-cialised psammophilous species.