1. Department of Geography; University of Valladolid; Valladolid Spain
2. Department of Geography; University of Barcelona; Barcelona Spain
3. GIR PANGEA; University of Valladolid; Valladolid Spain
4. Instituto Pirenaico de Ecología (CSIC); Campus de Aula Dei; Zaragoza Spain
5. CIESE-Comillas; University of Cantabria; Comillas Spain
6. Department of Specific Didactics; Autonomous University of Madrid; Madrid Spain
7. Interdisciplinary Centre of Social Sciences; New University of Lisbon; Lisbon Portugal
8. Institute of Geography and Spatial Planning - CEG; Universidade de Lisboa; Lisbon Portugal