[1] Bulgarian Acad Sci, Inst Biodivers & Ecosyst Res, Acad G Bonchev Str 23, Sofia 1113, Bulgaria
[2] Babes Bolyai Univ, Fac Biol & Geol, Republ Str 42, Cluj Napoca 400015, Romania
[3] Univ Pitesti, Fac Sci Phys Educ & Informat, Targul din Vale Str 1, Pitesti 110040, Romania
[4] Univ Trier, Fac Reg & Environm Sci, Dept Geobot, Behringstr 21, D-54296 Trier, Germany
[5] Romanian Acad, Inst Biol Bucharest, Splaiul Independentei 296, Bucharest 060031, Romania
[6] Trinity Coll Dublin, Sch Nat Sci, Coll Green, Dublin 2, Ireland
[7] St Kliment Ohridski Univ Sofia, Dept Ecol & Environm Protect, Fac Biol, Dragan Tzankov Blvd 8, Sofia 1164, Bulgaria
[8] Natl Inst Res & Dev Forestry Marin Dracea, Horea Str 65, Cluj Napoca 400275, Romania
[9] Univ Sofia St Kliment Ohridski, Fac Geol & Geog, Tzar Osvoboditel Blvd 8, Sofia 1000, Bulgaria
[10] Johannes Gutenberg Univ Mainz, Inst Spezielle Bot, D-55099 Mainz, Germany
[11] Christian Albrechts Univ Kiel, Inst Ecosyst Res, Olshausenstr 75, D-24118 Kiel, Germany
[12] Univ Plovdiv Paisii Hilendarski, Fac Biol, Todor Samodumov Str 2, Plovdiv 4000, Bulgaria
[13] Wageningen UR, Alterra, POB 47, NL-6700 AA Wageningen, Netherlands
[14] Slovak Acad Sci, Inst Bot, Inst Bot Plant Sci & Biodivers Ctr, Dubravska Cesta 9, Bratislava 84523, Slovakia
[15] Masaryk Univ, Dept Bot & Zool, Fac Sci, Kotlarska 2, Brno 61137, Czech Republic
[16] Univ Belgrade, Inst Bot, Fac Biol, Takovska 43, Belgrade 11000, Serbia
[17] Univ Gottingen, Agroecol, Grisebachstr 6, D-37077 Gottingen, Germany
[18] Alexandru Ioan Cuza Univ, Anastasie Fatu Bot Garden, Dumbrava Rosie Str 7-9, Iasi 700487, Romania
[19] Planungsburo Dr Huck, Gen Colin Powell Str 4a, D-63571 Gelnhausen, Germany
[20] Hungarian Acad Sci, Ctr Ecol Res, Alkotmany Str 2-4, H-2163 Vacratot, Hungary
[21] Rhein Friedrich Wilhelms Univ Bonn, Inst Crop Sci & Resource Conservat, Katzenburgweg 1, D-53115 Bonn, Germany
[22] Babes Bolyai Univ, Alexandru Borza Bot Garden, Republ Str 42, Cluj Napoca 400015, Romania
[23] Inst Biol Res Cluj Napoca, Branch Natl Inst Res & Dev Biol Sci, 48 Republ Str 48, Cluj Napoca 400015, Romania
[24] Ion Ionescu Brad Univ Agr Sci & Vet Med Ion Iones, Mihail Sadoveanu Alley 3, Iasi 700490, Romania
[25] Arges Cty Museum, Armand Calinescu Str 44, Pitesti 110047, Romania
[26] Univ Gottingen, Dept Plant Ecol & Ecosyst Res, Untere Karspule 2, D-37073 Gottingen, Germany
[27] Stefan cel Mare Univ, Fac Forestry, Univ Str 13, Suceava 720229, Romania
[28] Zurich Univ Appl Sci ZHAW, Inst Nat Resource Sci IUNR, Vegetat Ecol Res Grp, Gruentalstr 14, CH-8820 Wadenswil, Switzerland
[29] Bayreuth Ctr Ecol & Environm Res BayCEER, Plant Ecol Grp, Univ Str 30, D-95447 Bayreuth, Germany
[30] German Ctr Integrat Biodivers Res iDiv, Halle Jena Leipzig,Deutsch Pl 5e, D-04103 Leipzig, Germany