1. Department of Computational Landscape Ecology; Helmholtz Centre for Environmental Research - UFZ; Permoserstraße 15 Leipzig 04318 Germany
2. Center for Earth Observation and Department of Forestry and Environmental Resources; North Carolina State University; Raleigh NC 27695 USA
3. Geography Department; Humboldt-Universität zu Berlin; Berlin 10099 Germany
4. Department of Ecology and Environmental Sciences; Faculty of Science; Palacký University Olomouc; Olomouc 77146 Czech Republic