1. Senckenberg Biodiversity and Climate Research Centre, 60325 Frankfurt, Germany
2. Terrestrial Ecology Research Group, Technical University of Munich, 85354 Freising, Germany
3. Department of Biological Sciences, Goethe University Frankfurt, 60438 Frankfurt, Germany
4. Institute of Physical Geography, Goethe University, 60438 Frankfurt, Germany
5. Department of Biosciences, Durham University, DH1 3LE Durham, UK
6. Institut für Geowissenschaften, Goethe University Frankfurt, 60438 Frankfurt, Germany