1. Dahlem Center of Plant Sciences, Plant Ecology; Freie Universität Berlin-Institut für Biologie, Altensteinstr. 6, 14195; Berlin Germany
2. Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstr. 6, 14195; Berlin Germany
3. Institute of Microbiology; Academy of Sciences of the Czech Republic, Vídeňská 1083 Praha 4- Krč142 20; Prague Czech Republic
4. Department of Biology, Microbial Ecology/Biodiversity; Lund University; Sölvegatan 37 22362 Lund Sweden