1. Dept of Biometry and Environmental System Analysis; Univ. of Freiburg; Freiburg Germany
2. Dept of Biological Sciences; Wright State Univ.; Dayton OH USA
3. Dept of Biological Sciences; Univ. of Alberta; Edmonton AB Canada
4. School of BioSciences, Univ. of Melbourne; Melbourne Australia
5. Inst. of Geoecology, Div. of Landscape Ecology and Environmental Systems Analysis, Technische Univ. Braunschweig, Braunschweig, Germany, and: Berlin-Brandenburg Inst. of Advanced Biodiversity Research (BBIB); Berlin Germany
6. Lab. d’Écologie Alpine, Univ. Joseph Fourier; Grenoble France
7. School of Mathematics and Statistics and Evolution and Ecology Research Centre, The Univ. of New South Wales; Sydney Australia
8. Theoretical Ecology, Univ. of Regensburg; Regensburg Germany