藏东南川滇高山栎种群不同生长阶段的空间格局与关联性  

Spatial pattern analysis and associations of Quercus aquifolioides population at different growth stages in Southeast Tibet,China

作　　者：沈志强[1] 华敏[2] 丹曲[1] 卢杰[1] 方江平[1] 

机构地区：[1]西藏大学农牧学院,西藏林芝860000 [2]武汉大学资源与环境科学学院,武汉430079

出　　处：《应用生态学报》2016年第2期387-394,共8页Chinese Journal of Applied Ecology

基　　金：国家科技支撑计划重点项目(2013BAC04B01)资助~~

摘　　要：运用点格局分析方法中Ripley L函数,对藏东南川滇高山栎种群不同生长阶段的空间格局及其关联性进行分析.结果表明:藏东南川滇高山栎种群径级结构呈单峰型,小树与中树的数量在整个种群中占绝对优势,整个种群自然更新状况良好,属增长型种群.川滇高山栎种群在从小树发育到大树的过程中,小树、中树在小尺度上均呈明显的聚集分布,而大树在整个尺度上基本上呈随机分布.小树与中树、大树间在小尺度上有显著的相关性,而中树与大树不相关.川滇高山栎种群在从小树、中树发育到大树的过程中,其空间格局由聚集分布到随机分布.川滇高山栎种群的自然更新受种间竞争的影响,也受种内竞争的影响.在自然环境条件相似下,影响川滇高山栎种群分布格局的最主要因素是其自身的生物、生态学特性.This article analyzed the spatial pattern and its correlation of Quercus aquifolioides, Southeast Tibet at different growing stages by using Ripley＇ s L function in the method of point pattern analysis. The results showed the diameter structure of Q. aquifolioides population in Southeast Tibet followed a ＇ single peak＇ shape and the saplings and medium trees predominated in number in the whole population. The population had a high regeneration rate and was of increase type. In the growth process of Q. aquifolioides from saplings to large trees, saplings and medium trees showed aggregation distribution at small scale, while large trees showed basically random distribution at whole scale. There was significant correlation between saplings with medium or large trees at small scale, however, there was no correlation between medium and large trees. In the growth process of Q. aquifolioides population from saplings, medium trees to large trees, its spatial pattern developed from aggregative distribution to random distribution. The natural regeneration of Q. aquifolioides population was affected not only by interspecific competition, but also by intraspecific competition. In the similar natural environment, the most important factors affecting the spatial pattern of Q. aquifolioides population were its own biological and ecological characteristics.

关 键 词：川滇高山栎 点格局分析 分布格局 空间关联性 

分 类 号：S718.5[农业科学—林学]