1 Center for Spatial Analysis, Department for Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA. yaozhang@ou.edu.
2 Center for Spatial Analysis, Department for Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA. xiangming.xiao@ou.edu.
3 Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai, 200433, China. xiangming.xiao@ou.edu.
4 Center for Spatial Analysis, Department for Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA.
5 State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China.
6 Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, China.