1. Experimental Plant Ecology, Institute of Botany and Landscape Ecology, Greifswald University; Soldmannstraße 15 Greifswald 17487 Germany
2. Biogeography, Bayreuth Center of Ecology and Environmental Research (BayCEER); University of Bayreuth; Universitaetsstraße 30 Bayreuth 95440 Germany
3. Ecological-Botanical Gardens; University of Bayreuth; Universitaetsstraße 30 Bayreuth 95440 Germany
4. Disturbance Ecology, BayCEER; University of Bayreuth; Universitaetsstraße 30 Bayreuth 95440 Germany
5. Systematic Botany and Mycology, Department of Biology; University of Munich (LMU); Menzinger Straße 67 Munich 80638 Germany