1. Mitrani Department of Desert Ecology; The Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion 84990 Israel
2. Department of Life Sciences; Ben-Gurion University of the Negev; Beer Sheva 84105 Israel
3. Department of Plant Ecology and Conservation Biology; The University of Potsdam; Potsdam 14469 Germany
4. Department of Ecological Modelling; Helmholtz Centre for Environmental Research - UFZ; D-04318 Leipzig Germany