红树林空间结构均质性指数  

Homogeneity Index of Stand Spatial Structure of Mangrove Ecological System

作　　者：李建军[1] 李际平[1] 刘素青[2] 张宏伟[1] 冯湘兰[1] 

机构地区：[1]中南林业科技大学,长沙410004 [2]广东海洋大学,湛江524000

出　　处：《林业科学》2010年第6期6-14,共9页Scientia Silvae Sinicae

基　　金：国家自然科学基金(30771724);湖南省科技计划项目(2008FJ3101)资助

摘　　要：根据国内外天然林空间结构已有的研究成果,结合景观生态学理论,提出红树林林分空间结构优化的均质性目标和均质性指数的新概念;对影响林分空间结构均质性目标的各参数进行多目标规划,并给出均质性指数的定义和量化公式;首次使用灰色关联度分析法对广东湛江红树林国家自然保护区不同潮带林分空间结构影响因子调查数据与林木均质性指数的关联度进行分析,实例分析表明,各影响因子与均质性指数的关联度大小表现为竞争指数0.716>混交度0.686>空间密度指数0.670>目的树种特性指数0.644>角尺度0.638>大小比数0.616>健康指数0.607。林木均质性指数能较客观地反映红树林林木对所在林分均质性的影响,为建立红树林生态系统林分空间优化模型提供理论依据。Based on the research of natural forest spatial structure in China and abroad,and combined with the theory of landscape ecology,this paper proposed the homogeneity target optimizing the forest stand spatial structure of mangrove, and the new concept of homogeneity index. Parameters affecting the forest stand spatial structure homogeneity were formatted into multiple-objectives parameters. We also put forward the definition and the quantifying formula of homogeneity index. GRA （ grey relation analysis） was for the first time used to analyze relationship between forest homogeneity index and factors,which were derived a set of survey data,influencing mangrove forest stand spatial structure in different tidal zones in Mangrove Nation Natural Reserve at Zhanjiang,Guangdong. The case study indicated that the relationship and priority order between influencing factors and homogeneity index are： competition index 0. 716〉 mingling 0. 686〉 spatial density index 0. 670 〉Purpose tree species characteristic index 0. 644 〉neighborhood pattern 0. 638 neighborhood comparison 0. 616 〉Health index 0. 607. The forest homogeneity index can objectively reflect mangrove’s influences on forest stand homogeneity,and this study provided a theoretical basis for establishing an optimized model of forest spatial structure in mangrove ecological systems.

关 键 词：红树林生态系统 林分空间结构 均质性目标 均质性指数 灰色关联度分析法 

分 类 号：S757.1[农业科学—森林经理学] TP18[农业科学—林学]