1. Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350007, China
2. School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
3. Department of Geography and Planning, University of Toronto, Toronto, ON M5S 3G3, Canada
4. School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China