河北小五台山青杨种群中雌雄群体的空间分布及其成因

蒙振思,向卫,苏国岿,李大东,董廷发,彭进友,李晓东,龚小平,梁宁,胥晓

Spatial distribution of male and female Populus cathayana populations and its drivers in Xiaowutai Mountains, Hebei, China

MENG Zhen-Si,XIANG Wei,SU Guo-Kui,LI Da-Dong,DONG Ting-Fa,PENG Jin-You,LI Xiao-Dong,GONG Xiao-Ping,LIANG Ning,XU Xiao

表1 小五台山青杨空间分布的平均最近邻指数分析

Table 1 The average nearest neighbor analysis on the spatial distribution of Populus cathayana in Xiaowutai Mountains

性别 Sex 预期平均距离 Expected mean distance (m) 平均观测距离 Observed mean distance (m) 平均最近邻指数 Nearest neighbor ration R Z得分 Score-Z p 雄 Male 4.767 3.394 0.712 -31.045 < 0.001 雌 Female 4.900 3.362 0.686 -32.908 < 0.001 全部 Total 3.218 2.491 0.774 -36.105 < 0.001