1. Institute of Landscape and Plant Ecology; University of Hohenheim; August-von-Hartmann-Str. 3 70599 Stuttgart Germany
2. Disturbance Ecology; Bayreuth Center of Ecology and Environmental Research (BayCEER); University of Bayreuth; 95440 Bayreuth Germany
3. Biogeography; Bayreuth Center of Ecology and Environmental Research (BayCEER); University of Bayreuth; 95440 Bayreuth Germany