[1] Inverness Coll UHI, Forestry & Conservat Res Grp, 1 Inverness Campus, Highlands IV2 5NA, Scotland
[2] Univ Molise, Dipartimento Agr Ambiente & Alimenti, Via Francesco De Sanctis, I-86100 Campobasso, Italy
[3] Bur Forest Management & Geodesy, Sekocin Stary, Poland
[4] Mendel Univ Brno, Dept Forest Ecol, Zemedelska 3, Brno 61300, Czech Republic
[5] Univ Cumbria, Natl Sch Forestry, Ambleside Campus,Rydal Rd, Ambleside LA22 9BB, Cumbria, England
[6] Technol Univ Dublin, Environm Sustainabil & Hlth Inst, 7 Grangegorman Lower, Dublin, Ireland
[7] Univ Sarajevo, Fac Forestry, Chair Forest Management & Urban Greenery, Zagrebacka 20, Sarajevo 71000, Bosnia & Herceg
[8] INIA, Forest Res Ctr, Dept Forest Dynam & Management, Crta La Coruna Km 7, Madrid 28040, Spain
[9] Univ Valladolid, Sustainable Forest Management Res Inst, IUFOR, Valladolid, Spain
[10] INIA, Madrid, Spain
[11] Bulgarian Acad Sci, Inst Biodivers & Ecosyst Res, 2 Gagarin St, Sofia 1113, Bulgaria
[12] Szent Istvan Univ, Fac Hort Sci, Pater Karoly Utca 1, H-2100 Budapest, Hungary
[13] Slovak Acad Sci, Inst Forest Ecol, Dept Plant Ecophysiol, Sturova 2, Zvolen 96053, Slovakia
[14] Istanbul Univ Cerrahpasa, Dept Watershed Management, TR-34473 Istanbul, Turkey
[15] Duzce Univ, Dept Forest Engn, Fac Forestry, TR-81620 Duzce, Turkey
[16] Suourgotu 12, IS-400 Isafiroi, Iceland
[17] Univ Agr, Dept Forest Biodivers, Al 29 Listopada 46, PL-31425 Krakow, Poland
[18] Inst Politecn Braganca, Ctr Invest Montanha, Campus Santa Apolania, P-5300253 Braganca, Portugal