1. Cary Institute of Ecosystem Studies, Millbrook, New York, 12545 USA
2. Department of Plant Sciences, University of California, Davis, 1 Shields Avenue Davis, California, 95616 USA
3. School of Sustainability, Arizona State University, Wrigley Hall, PO Box 875402 Tempe, Arizona, 85287 USA
4. Australian Research Centre for Urban Ecology, Royal Botanic Gardens Victoria c/o School of BioSciences, University of Melbourne, Victoria, 3010 Australia
5. Research Center for Eco‐Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road Haidian District, Beijing, 100085 China