1. University of Vic - Central University of Catalonia, Vic 08500, Spain.
2. Universitat Barcelona, Barcelona 08028, Spain.
3. Utah State University, Logan, UT 84322, USA.
4. University of Canberra, Canberra 2601, Australia.
5. University of Koblenz-Landau, 76829 Landau, Germany.
6. Catalan Institution for Research and Advanced Studies, Barcelona 08010, Spain
7. North Carolina State University, Raleigh, NC 27695, USA.
8. Queensland Government, Australia.
9. U.S. Environmental Protection Agency, Cincinnati, OH 45268, USA.
10. EcoRing, 37181 Hardegsen, Germany.
11. Instituto de Biodiversidad Neotropical, Tucumán, Argentina.
12. Exponent Inc., Alexandria, VA 22314, USA.
13. CSIRO Land and Water, Canberra 2601, Australia.
14. Uzbekistan Academy of Sciences, Uzbekistan.
15. Rhodes University, Grahamstown 6140, South Africa.
16. Desert Research Institute, Las Vegas, NV 89119, USA.
17. Université de Rennes, 35042, Rennes, France.
18. Thuringian State Institute for Environment and Geology, D-07745 Jena, Germany.
19. Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.