1. Nicholas School of the Environment, Duke University, Box 90328, Durham, NC 27708, USA.
2. Instituto de Pesquisas Ecológicas, Rodovia Dom Pedro I, km 47, Caixa Postal 47, Nazaré Paulista SP, 12960-000, Brazil.
3. Post Office Box 402 Haverford, PA 19041, USA.
4. International Union for Conservation of Nature, IUCN, 28 Rue Mauverney, CH-1196 Gland, Switzerland.
5. Odum School of Ecology, University of Georgia, Athens, GA 30602, USA.
6. Microsoft Research, 21 Station Road, Cambridge, CB1 2FB, UK.
7. Missouri Botanical Garden, Post Office Box 299, St. Louis, MO 63166–0299, USA.
8. Environment Department, University of York, York, YO10 5DD, UK.
9. Global Land Cover Facility, Department of Geographical Sciences, University of Maryland, College Park, MD, 20742, USA.