1. Interagency Ecological Program; California Department of Fish and Wildlife; 2109 Arch Airport Road, Suite 100 Stockton California 95206 USA
2. Center for Spatial Technologies and Remote Sensing; University of California; One Shields Avenue Davis California 95616 USA
3. University Research Priority Program in Global Change and Biodiversity and Department of Geography; University of Zürich; Winterthurerstrasse 190 8057 Zürich Switzerland
4. Efficient Use of Water in Agriculture Program, Institute of Agri-Food, Research and Technology (IRTA), Fruitcentre; Parc Científic i Tecnològic de Gardeny; 25008 Lleida Spain