School of Urban and Environmental Sciences, Northeast Normal University, Changchun, Jilin 130024, China;
School of Urban and Environmental Sciences, Northeast Normal University, Changchun, Jilin 130024, China;
School of Urban and Environmental Sciences, Northeast Normal University, Changchun, Jilin 130024, China;
Department of Natural Resources Science, University of Rhode Island, Kingston, RI 02881-0804, USA;