1. School of Geography and Tourism, Jiaying University, Meizhou, China
2. School of Geography Science, South China Normal University, Guangzhou, China
3. Department of Geography, University of Tennessee, Knoxville, TN, USA
4. Institute of Marine Science, Shantou University, Shantou, China
5. Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion, UK
6. Department of Geography, Texas State University, San Marcos, TX, USA