1. Institute of Agro-Environmental & Forest Biology (IBAF); National Research Council (CNR); Via Marconi 2 05010 Porano TR Italy
2. Czechglobe, Global Change Research Centre, Academy of Sciences of the Czech Republic; Bělidla 986/4a 603 00 Brno Czech Republic
3. UniMol; DiBT. Molise Univ.; Dep. of Biosciences and Territory; Isernia Pesche (IS) Contrada Fonte Lappone 86170 Italy
4. USDA-Forest Service, Northern Research Station; 5 Moon Library, SUNY-ESF Syracuse NY 13210
5. Council for Agricultural Research and Economics, Research Center for the Soil-Plant System; Via della Navicella 2-4 00184 Rome Italy