1. Department of Agroforestry, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
2. Sustainable Forest Management Research Institute, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
3. Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, C/ Catedrático José Beltrán 2, 46980 Paterna-Valencia, Spain