1. Food and Agriculture Organization of the United Nations, Vialle delle Terme di Caracalla, 00153 Rome, Italy.
2. Landscape Ecology and Plant Production Systems Unit, Université libre de Bruxelles, CP264-2, B-1050, Bruxelles, Belgium.
3. School of Geography, University of Leeds, Leeds LS2 9JT, UK.
4. Environmental Change Institute, School of Geography and the Environment, South Parks Road, Oxford, OX1 3QY, UK.
5. United Nations Development Programme, Bureau for Policy and Programme Support, New York, NY 10017, USA.
6. Google, Mountain View, CA, USA.
7. Terrestrial Ecosystem Research Network, School of Biological Sciences, University of Adelaide, South Australia 5005, Adelaide, Australia.
8. Instituto Argentino de Investigaciones de las Zonas Áridas–Consejo Nacional de Investigaciones Científicas y Técnicas, Mendoza, Argentina.
9. Ministry of Agriculture, General Directorate of Forests-Inventory Service, Tunis-Tunisia.
10. Bartın University, Faculty of Forestry, Department of Forest Engineering, Bartın, Turkey.
11. Department of Environmental Biology, Sapienza University of Rome, Rome, Italy.
12. Food and Agriculture Organization of the United Nations, Subregional Office for Central Asia, Ankara, Turkey.
13. Technical University of Madrid (UPM), Department of Forest and Environmental Engineering and Management, Escuela Técnica Superior de Ingenieros de Montes, Ciudad Universitaria, Madrid 28040, Spain.
14. Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden.
15. Environment Institute and School of Biological Sciences, University of Adelaide, North terrace, Adelaide, South Australia 5005, Australia.
16. Centre Régional AGRHYMET, Niamey BP 11011, Niger.
17. Interior West-Forest Inventory and Analysis, Forest Service, U.S. Department of Agriculture, Fort Collins, USA.
18. Instituto Nacional di Semiarido, 10067 Bairro Serrotão, Brazil.
19. World Resources Institute, 10 G Street NE, Washington, DC 20002, USA.
20. Department of Forest and Hunting Inventory of Kyrgyztan, Bishkek, Kyrgyztan.