大兴安岭南段阔叶次生林空间格局及种间关系  

Spatial Distribution Pattern and Interspecific Relationship of Broadleaved Secondary Forest in Southern Daxing' an Mountains

作　　者：曾楠[1] 周梅[2] 赵鹏武[2] 魏江生[2] 陈翔[1] 舒洋[1] 

机构地区：[1]内蒙古农业大学,呼和浩特010019 [2]内蒙古农业大学赛罕乌拉森林生态系统定位研究站

出　　处：《东北林业大学学报》2014年第7期36-39,43,共5页Journal of Northeast Forestry University

基　　金：内蒙古自治区科技计划项目(20110527;20120421;20130421)

摘　　要：在大兴安岭南段的赛罕乌拉森林生态系统定位研究站,采用CTFS样地建设标准,设置面积为6 hm2的阔叶次生林固定样地。采用点格局分析方法,对群落内主要种群的空间格局及种间关系进行了研究。结果表明:群落内乔木层共出现7个种群,树木共计13906株,群落密度2 317株/hm2;大兴安岭南段阔叶次生林优势种群均呈现聚集分布,种群的聚集强度随尺度变化较明显;聚集强度L(t)值:蒙古栎>黑桦>白桦>山杨;大兴安岭南段阔叶次生林群落种间关系以正相关为主,群落内树种之间的竞争以及物种更替现象并不激烈,群落组成和结构正处于稳定状态,群落内较高比例枯立木的产生并非是种群竞争所致。In Saihanwula Forest Ecosystem Research Station of southern Daxing＇ an Mountains we used the CTFS （ Center for tropical forest science） sample area construction standards to build 6 hm2 fixed sample plot of broadleaved secondary forest. By using point pattern analysis, we studied the community within the main population spatial distribution pattern and interspecific relationship. In community, there were seven species, a total of 13 906 trees, the population density of 2 317 hm2. The dominant population of broadleaved secondary forest in southern Daxing＇ an Mountains are aggregation distribution, and the intensity of population aggregation change is more obvious. Intensity aggregation value L（t） is Quercusmongolica〉 Betuladahurica〉Betulaplaty phylla〉Populus davidiana Dode. The interspecific relationship of broadleaved secondary forest in southern Daxing＇ an Mountains is positive correlation with less competition and replacement of tree species within the community, and the community composition and structure are in a stable state. The main cause of the high proportion of dry wood in community is not the comoetition between soecies.

关 键 词：阔叶次生林 空间格局 种间关系 点格局分析 

分 类 号：S718.54[农业科学—林学]