1. Dept of Geography Humboldt‐Univ. zu Berlin Berlin Germany
2. German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig Leipzig Germany
3. Martin Luther Univ., Halle Wittenberg, Inst. of Biology Germany
4. Dept of Environmental Biology Sapienza Univ. of Rome Rome Italy
5. Ist. di Cristallografia, C. N. R. Monterotondo Italy
6. Dept of Botany and Zoology Masaryk Univ. Brno Czech Republic