1. Institute of Ecological Science, Vrije Universiteit, 1081 HV Amsterdam, Netherlands.
2. Université de Rennes I, CNRS UMR6553 EcoBio, Campus Beaulieu, F-35042 Rennes, France.
3. Rutgers, The State University of New Jersey, Biology Department, 315 Penn Street, Camden, NJ 08102, USA.
4. Department of Biology and Microbiology, South Dakota State University, Brookings, SD 57007, USA.
5. Department of Microbial Ecology, Netherlands Institute of Ecology, Droevendaalsesteeg 10 6708 PB Wageningen, Netherlands.
6. Biology and Physical Geography, The University of British Columbia, Okanagan, Kelowna, British Columbia, Canada.
7. Estación Experimental del Zaidín (CSIC), Calle Profesor Albareda 1, Granada 18008, Spain.
8. Department of Biology, University of Florida, Gainesville, FL 32611, USA.
9. Department of Zoology, Oxford University, South Parks Road, Oxford OX1 3PS, UK.
10. Institute of Agricultural Sciences, Eidgenössische Technische Hochschule (ETH) Zurich, Lindau 8315, Switzerland.