1. BC3-Basque Centre for Climate Change, Scientific Campus of the University of the Basque Country, 48940 Leioa, Bizkaia, Spain
2. Department of Plant Biology and Ecology, University of Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Bizkaia, Spain
3. Department of Forest Sciences, Transilvania University of Braşov, Sirul Beethoven-1, 500123 Braşov, Romania
4. Faculty of Forestry, Institute for Dehesa Research (INDEHESA), University of Extremadura, Avenida Virgen del Puerto 2, 10600 Plasencia, Spain
5. IKERBASQUE, Basque Foundation for SciencePlaza Euskadi 548009 Bilbao, Bizkaia, Spain