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1 华北地区各地核桃楸种群密度及各径级胡桃楸数量

Table 1 Juglans mandshurica’s population density and the numbers of each diameter classes in North China

径级 Diameter classes (cm ) 天津 Tianjin 北京 Beijing 河北 Hebei 山西 Shanxi 河南 Henan 陕西 Shaanxi 1-3 109 12 17 7 11 18 3-5 58 38 110 44 1 3 5-7 90 30 0 46 1 1 7-9 104 10 0 22 0 1 9-11 56 5 0 2 0 3 11-13 11 5 0 1 0 0 13-15 5 0 0 0 0 3 15-17 0 0 0 0 0 2 >17 1 0 0 0 0 0 种群密度 Population density (ind.·km-2) 14 25 53 23 6 9