1. Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500 Yunnan, China
2. Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
3. Faculty of Life Sciences, Laboratory of Freshwater & Stress Ecology, Humboldt-Universität zu Berlin, Arboretum, Späthstr. 80/81, 12437 Berlin, Germany
4. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
5. Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States