Understanding woody plant encroachment into semi-arid grasslands and the associated impacts during the recent decades

Jie Wang, University of Oklahoma Norman Campus, Department of Microbiology and Plant Biology, Center for Spatial Analysis, Norman, OK, United States, Yuanwei Qin, University of Oklahoma, Norman, OK, United States and Xiangming Xiao, Department of Microbiology and Plant Biology, Center for Spatial Analysis, University of Oklahoma, Norman, United States