1. CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenhe, Shenyang, Liaoning, China
2. Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford St., Cambridge, MA, USA
3. Department of Plant Sciences, University of California Davis, 387 N Quad, Davis, CA, USA
4. Department of Biology, New Mexico State University, 1780 E. University Ave., MSC 3AF, Las Cruces, NM, USA
5. Department of Biological Sciences, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA