[1] Ctr Invest Forestal CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria INIA, Ctra La Coruna Km 7-5, Madrid 28040, Spain
[2] ETSI Montes Polytech Univ Madrid, Madrid 28040, Spain
[3] UN Econ Commiss Europe, Forestry & Timber Sect, UNECE Forests Land & Housing Div, Food & Agr Org, CH-1211 Geneva 10, Switzerland
[4] Swiss Fed Res Inst WSL, Programme Natl Forest Inventory, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland
[5] Consiglio Ric Agr & Anal Econ Agr, Unita Ric Monitoraggio & Pianificaz Forestale CRA, Piazza Nicolini 6, I-38123 Trento, Italy
[6] Norwegian Forest & Landscape Inst, POB 115, N-1431 As, Norway
[7] State Forest Serv, Pramones Ave 11A, LT-51327 Kaunas, Lithuania
[8] Iceland Forest Res, IS-116 Reykjavik, Iceland
[9] Dept Agr Food & Marine, Johnstown Castle Estate, Wexford, Ireland
[10] Univ Forestry, Fac Business Management, Dept Mkt & Prod Management, 10 St Kliment Ohridski Blvd, Sofia 1756, Bulgaria
[11] Forest Res Inst, Dept Silviculture & Management Forest Resources, BAS132,St Kliment Ohridski Blvd, Sofia 1756, Bulgaria
[12] Swedish Univ Agr Sci SLU, SE-90183 Umea, Sweden
[13] Univ Lisbon, Forest Res Ctr, Inst Super Agron, P-1349017 Lisbon, Portugal
[14] Forest Res & Management Inst, Sos Stefanesti 128, Voluntari 077190, Ilfov, Romania
[15] European Commiss, Joint Res Ctr, Inst Environm & Sustainabil, Forest Resources & Climate Unit, Via E Fermi 2749, I-21027 Ispra, Italy