1. Department of Biology, Centre for Environmental and Marine Studies (CESAM) University of Aveiro 3810‐193Aveiro Portugal
2. Sustainable Forest Management Research Institute University of Valladolid – INIA Avenida de Madrid 44 Palencia Spain
3. Department of Plant Production and Forest Resources University of Valladolid, Avenida de Madrid 44, 34071Palencia Spain
4. Departamento de Ciencias Agrarias y del Medio Natural Universitat Jaume I 12071Castelló de la Plana Spain