华北地区胡桃楸林分布规律及群落构建机制分析

唐丽丽,张梅,赵香林,康慕谊,刘鸿雁,高贤明,杨彤,郑璞帆,石福臣

Species distribution and community assembly rules of Juglans mandshurica in North China

TANG Li-Li,ZHANG Mei,ZHAO Xiang-Lin,KANG Mu-Yi,LIU Hong-Yan,GAO Xian-Ming,YANG Tong,ZHENG Pu-Fan,SHI Fu-Chen

表2 华北地区胡桃楸分布与环境因子在前四排序轴上的相关系数

Table 2 Correlation coefficients between distribution of Juglans mandshurica and environmental factors at the first fourth canonical correspondence analysis (CCA) ordination axes in North China

环境因子 Environmental factor CCA排序轴 CCA 1 CCA 2 CCA 3 CCA 4 海拔 Elevation -0.95*** -0.06 -0.27* -0.02 坡度 Slop 0.57*** -0.54*** -0.39*** 0.28* 坡向 Aspect 0.13 0.30 0.57*** -0.49*** 坡位 Slop position 0.45** -0.48*** -0.37*** -0.64*** 人为干扰 Disturbance -0.17** -0.65*** 0.68*** -0.23 特征值 Eigenvalue 0.59*** 0.31*** 0.28*** 0.20*** 累计贡献率 Cumulative proportion 39.08% 59.52% 77.93% 91.39%