1. GEOFOREST Group, Environmental Sciences Institute (IUCA); University of Zaragoza; Pedro Cerbuna 12, E-50009 Zaragoza Spain
2. Department of Geography and Land Management; University of Zaragoza; Pedro Cerbuna 12, E-50009 Zaragoza Spain
3. Department of Environmental Sciences; Technical State University of Quevedo; EC-120509 Quevedo Ecuador
4. Geo-environmental Processes and Global Change, IPE-CSIC; Pyrenean Institute of Ecology; Avda. Montañana 1005, E-50059 Zaragoza Spain