云南巧家药山珙桐群落主要树种种间联结研究  

Study on Interconnections among Main Tree Populations of Davidia involucrata Community of Qiaojia Yaoshan Mountain in Yunnan

作　　者：周瑞伍 彭明春[1] 王崇云[1] 罗雪娟[1] 李望军[1] 

机构地区：[1]云南大学生态学与地植物学研究所,云南昆明650091

出　　处：《西部林业科学》2015年第1期51-57,共7页Journal of West China Forestry Science

摘　　要：2013年8月,在云南巧家县药山自然保护区,设置两块乔木样地,进行调查,在2×2列联表基础上,应用χ2检验、联结系数(AC)、Jaccard(JI)指数以及点相关系数(φ)检验巧家药山珙桐群落的种间联结性。结果表明,珙桐群落中种间联结程度不高,有17种对呈现显著正联结性。大多数种对间的联结度低,存在极大排斥性的种对较少。珙桐与白楠、野茉莉之间存在显著正联结性;珙桐与川冬青、领春木之间存在显著负联结性。八角枫与8种植物之间存在正联结性,说明八角枫对群落的稳定性起重要作用。川冬青与野八角、野茉莉、云南枫杨之间存在显著的正联结性,表明川冬青可能是群落的关键种。珙桐与常绿树种成正联结性的较多而与落叶树种成负联结性的较多。In August of 2013, in Yaoshan Mountain Nature Reserve of Qiaojiao County in Yunnan, two tree sam-ple plots were set for investigation.Based upon a 2 ×2 contingency table, a series of techniques includingχ2 test, association coefficient （ AC） and Jaccard index （ JI） were used to determine interspecific association among Davidia involucrata Community.The results showed that the interspecific association was not strong, and only 17 pairs of species exhibited significantly positive association.There was a low association degree between most pairs of spe-cies;meanwhile few pairs of species were extremely exclusive to each other.Davidia involucrata was extremely positively associated with Phoebe neurantha and Styrax macranthus, but extremely negatively associated with Ilex szechwanensis and Euptelea pleiosperma.The fact that Alangium chinensis were positively associated with 8 species showed that it was stable plant in community and played an important role in maintaining the stable structure of D.involucrata Community.Ilex szechwanensis was a key species, because it was extremely positively associated with the three plants such as Illicium simonsii, Styrax japonicus and Pterocarya delavayi, Davidia involurata were more positively associated with evergreen trees, and negatively associated with deciduous trees.

关 键 词：珙桐 种间联结 巧家药山 联结系数 χ^2 检验 常绿树种 落叶树种 

分 类 号：S718.549[农业科学—林学]