文献类型：期刊文献

中文题名：北京九龙山侧柏人工林空间结构多样性

英文题名：Spatial structure diversity of platycladus orientalis plantation in Beijing Jiulong Mountain

作者：张连金[1] 胡艳波[2] 赵中华[2] 孙长忠[1]

第一作者：张连金

机构：[1]中国林业科学研究院华北林业实验中心;[2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室

年份：2015

卷号：34

期号：1

起止页码：60-69

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家"十二五"科技支撑计划项目(2012BAD22B0304)资助

语种：中文

中文关键词：九龙山;侧柏;空间多样性;结构参数;直径分布;二元分布

外文关键词：Jiulong Mountain ; Platycladus orientalis ; spatial diversity ; structural parameter;diameter distribution; bivariate distribution.

分类号：S791.38

摘要：以北京九龙山面积为0.32 hm2样地调查数据为基础,采用传统方法及结构参数角尺度(W)、大小比数(U)和混交度(M)的二元分布法,分析了侧柏(Platycladus orientalis)人工林的空间结构多样性。结果表明:群落结构较为简单,侧柏占绝对优势,并处于低度混交、大小分化不明显且均匀分布状态,而其他伴生树种则处于高度混交与相对劣势状态;林分径级与树高结构呈单峰分布;侧柏林中平均59%的林木个体周围最近4株树均和它同种,22%林木个体周围最近4株树仅有一株其他树种,总体处于低度混交状态;侧柏样地有52%的林木呈随机分布,且处于随机分布状态的林木其周围57%都是本种,同时处于高度混交状态(M=0.75,1.00)的林木有50%呈随机分布;不同优势度的林木有相近的概率,但优势木略多于劣势木,且大多处于低度混交和随机分布状态。侧柏人工林的空间多样性是由混交度及直径分化共同决定的,这种结果不仅与群落的发展阶段密切相关,还与群落的起源、人为干扰以及物种组成有关。
Based on survey data of a 0.32 hm2 plot in Beijing Jiulong Mountain, the spatial struc- ture diversity of a Platycladus orientalis plantation was analyzed using traditional approaches and a bivariate distribution of three structural parameters, i.e., uniform angle index （W） , dominance （U） and mingling （M）. The community structure was relatively simple. The P. orientalis popula- tion was in an obviously dominant position, and in a state of low mingling, insignificant size dif- ferentiation and uniform distribution, while other accompanying species were in a state of high mingling and relative disadvantage. The diameter and height distribution of the stand presented as unimodal. 59% of individual trees in the P. orientalis forest were surrounded by the same spe- cies, and 22% were surrounded by only one other species among their nearest four neighbors, i.e., the forest was in a state of low mingling. More than half （52%） of the trees in the plot were in a random pattern, in which most trees （57%） were surrounded by the same species, while 50% of the trees in high mixture （mingling=0.75, 1.00） were randomly distributed. The trees of different extents of dominance had a similar frequency, but the number of dominant trees was slightly more than that of non-dominants, and most of the dominant trees were in a state of low mingling and random pattern. The spatial diversity in the P. orientalis plantation resulted from mingling and diameter differentiation. Such a result was not only closely related to the develop-ment stage of community but also connected to its origin, anthropogenic disturbance and species composition.