[1] Masaryk Univ, Dept Bot & Zool, Kotlarska 2, Brno 61137, Czech Republic
[2] Russian Acad Sci, Ctr Forest Ecol & Product, Profsoyuznaya 84-32, Moscow 117997, Russia
[3] Univ Tartu, Dept Bot, Lai St 40, EE-51005 Tartu, Estonia
[4] Univ Latvia, Dept Geog, 1 Jelgavas Iela, LV-1004 Riga, Latvia
[5] Latvian State Forest Res Inst Silava, Salaspils, 111 Rigas Iela, LV-2169 Salaspils, Latvia
[6] Russian Acad Sci, Komarov Bot Inst, Lab Gen Geobot, Prof Popov Str 2, St Petersburg 197376, Russia
[7] Russian Acad Sci, Karelian Res Ctr, Forest Res Inst, Pushkinskaya 11, Petrozavodsk 185910, Russia
[8] Russian Acad Sci, Inst Geog, Staromonetny Per 29, Moscow 119017, Russia
[9] Russian Acad Sci, Laverov Fed Ctr Integrated Arctic Res, Severnoy Dviny Embankment 23, Arkhangelsk 163000, Russia
[10] Univ Bremen, Inst Ecol, Vegetat Ecol & Conservat Biol, Fac Biol Chem FB 02, Leobener Str 5, D-28359 Bremen, Germany
[11] Univ Oslo, Nat Hist Museum, Sars Gate 1, N-0562 Oslo, Norway
[12] Lyceum Vorobyovy Gory, Kosygina 17, Moscow 119334, Russia
[13] Yu A Izrael Inst Global Climate & Ecol, Dept Monitoring Greenhouse Gas Flows Nat & Anthro, Glebovskaya 20B, Moscow 107258, Russia
[14] WWF Russia, Nikoloyamskaya 19, Moscow 109240, Russia
[15] Univ Maryland, Dept Geog Sci, 4321 Hartwick Rd,Suite 400, College Pk, MD 20740 USA
[16] Norwegian Inst Bioecon Res, Dept Forestry & Forest Resources, Fanaflaten 4, N-5244 Fana, Norway
[17] Bryansk State Univ, Dept Biol, Bezhitskaya 14, Bryansk 241050, Russia
[18] Northern Arctic Fed Univ, Dept Biol Ecol & Biotechnol, Emb 17, Arkhangelsk 163002, Russia
[19] Pechora Ilych State Nat Biosphere Reserve, Laninoy 8, Troitsko Pechora Dist 169436, Komi Republic, Russia
[20] Natl Acad Sci Belarus, VF Kuprevich Inst Expt Bot, Lab Geobot & Vegetat Mapping, Akad Naya 27, Minsk 220072, BELARUS