[1] Univ Regensburg, Ecol & Nat Conservat Biol, D-93040 Regensburg, Germany
[2] Plant Biodivers Lab, Cent Siberian Bot Garden, Novosibirsk, Russia
[3] Univ Regensburg, Theoret Ecol, Regensburg, Germany
[4] Russian Acad Sci, Inst Gen & Expt Biol, Siberian Branch, Ulan Ude, Russia
[5] FSE Zapovednoe Podlemorye, Ulan Ude, Russia
[6] Boston Univ, Dept Biol, 5 Cummington St, Boston, MA 02215 USA