Discrimination of “secondary invasion” and plant secondary invasion.
XU Guang-yao1, LI Hong-yuan1*, MENG Wei-qing2, MO Xun-qiang2
(1College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; 2College of Urban and Environmental Science, Tianjin Normal University, Tianjin 300387, China).