1. Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague-Suchdol, Czech Republic
2. Department of Mycorrhizal Symbioses, Institute of Botany,Czech Academy of Sciences, 272 53 Pruhonice, Czech Republic
3. Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
4. Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
5. Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, CZ-165 00 Prague 6, Czech Republic
6. Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University in Prague, Albertov 6, CZ-128 43 Prague 2, Czech Republic