1. Department of Zoology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
2. Institute of Entomology, Biology Centre of the Academy of Sciences of the Czech Republic v.v.i., České Budějovice, Czech Republic
3. Department of Earth and Environment Sciences (sect. Landscape Ecology), University of Pavia, Pavia, Italy
4. Faculty of Arts, Science and Technology, University of Northampton, Avenue Campus, Northampton, NN2 6JD, UK