1. Inst. of Biological and Environmental Sciences, Univ. of Aberdeen, Zoology Building; Tillydrone Avenue Aberdeen AB24 2TZ UK
2. Dynamic Macroecology, Swiss Federal Inst. WSL; Zürcherstraße 111 CH-8903 Birmensdorf Switzerland
3. Plant Ecology and Nature Conservation, Inst. for Biochemistry and Biology, Univ. of Potsdam; Maulbeerallee 2 DE-14469 Potsdam Germany
4. UR EMGR Écosystèmes Montagnards; Irstea, 2 rue de la Papeterie-BP 76 FR-38402 St-Martin-d'Hères France
5. Biogeographical Modelling, Bayreuth Center for Ecology and Environmental Research BayCEER, Univ. of Bayreuth; Universitätstraße 30 DE-95447 Bayreuth Germany