1. Erguna Forest‐Steppe Ecotone Ecosystem Research Station Institute of Applied Ecology, Chinese Academy of Sciences Shenyang China
2. University of Chinese Academy of Sciences Beijing China
3. Key Laboratory of Stable Isotope Techniques and Applications Shenyang China
4. School of Life Sciences Hebei University Baoding China
5. CSIC, Global Ecology Unit CREAF‐CSIC‐UAB Bellaterra Catalonia Spain
6. CREAF Cerdanyola del Vallès Catalonia Spain