1. Swiss Federal Research Institute WSL; Birmensdorf; Switzerland
2. National Center for Ecological Analysis and Synthesis; Santa Barbara; CA; USA
3. Centro de Estudios Avanzados en Zonas Aridas; Universidad Católica del Norte; Coquimbo; Chile
4. Stanford University; Hopkins Marine Station; Pacific Grove; CA; USA
5. Union of Concerned Scientists; Cambridge; MA; USA