1. Environmental Science, Policy and Management; University of California at Berkeley; 130 Mulford Hall Berkeley California 94720 USA
2. Ecology, Evolution, and Organismal Biology; Iowa State University; 251 Bessey Hall Ames Iowa 50011 USA
3. Department of Physiological Diversity; Helmholtz Center for Environmental Research-UFZ; Permoserstrasse 15 04318 Leipzig Germany
4. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Deutscher Platz 5e D-04103 Leipzig Germany
5. Institute of Biology; Martin Luther University Halle-Wittenberg; Am Kirchtor 1 06108 Halle (Saale) Germany
6. Institute of Arctic and Alpine Research; University of Colorado; 1560 30th Street Boulder Colorado 80303 USA