1. Estación Experimental de Zonas Áridas (EEZA-CSIC); Ctra. de Sacramento s/n La Cañada de San Urbano E-04120 Almería Spain
2. Department of Biology; University of Oulu; POB 3000 FIN-90014 Oulu Finland
3. Department of Biology and Biotechnology; American University of Madaba; Madaba Jordan
4. Department of Ecology; Faculty of Science; Charles University; Viničná, 7 128 44 Praha 2 Praha Czech Republic