1. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
2. China National Botanical Garden, Beijing 100093, China
3. Department of the Higher Plants, Biology Faculty, Lomonosov Moscow State University, Moscow 119991, Russia
4. Laboratory of Hydrobiology, Institute for Water and Environmental Problems of the Siberian Branch of the Russian Academy of Sciences, Barnaul 656038, Russia