1. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany Chinese Academy of Sciences Beijing China
2. Department of Biological Sciences Alabama State University Montgomery Alabama
3. Institute of Loess Plateau Shanxi University Taiyuan China
4. College of Agriculture Liaocheng University Liaocheng China
5. Department of Vegetation Ecology, Institute of Botany Mongolian Academy of Sciences Ulaanbaatar Mongolia
6. Department of Plant Pathology North Carolina State University Raleigh North Carolina
7. University of Chinese Academy of Sciences Beijing China