1. Sustainable Forest Management Research Institute; University of Valladolid-CIFOR-INIA; Palencia Spain
2. Department of Ecology; Swedish University of Agricultural Sciences; Uppsala Sweden
3. Departamento de Zoología y Antropología Física; University of Murcia; Murcia Spain
4. INRA; UMR1202 BIOGECO; Cestas France
5. Univ. Bordeaux; BIOGECO; Pessac France
6. Instituto Nacional de Investigação Agrária e Veterinária - INIAV; Oeiras Portugal