秦岭西段锐齿栎群落优势种种间联结和种间分离规律的研究  

Research on the Interspecific Association and Separation of the Dominant Populations of Quercus aliena var. acuteserrata Community in the West of Qinling

作　　者：蔡章君 

机构地区：[1]四川省盐边县益民乡农业服务中心,四川攀枝花617100

出　　处：《四川林勘设计》2016年第3期20-26,共7页Sichuan Forestry Exploration and Design

摘　　要：在野外对秦岭西段锐齿栎群落中的乔木进行统计，选取频度大于35％的优势种，在2X2联列表基础上，应用χ^2检验、Ochiai系数和Dice系数检验研究36个优势种群的种间联结性。并结合种间分离指数，比较系统地揭示了它们的内在联系。结果表明：（1）优势种群的种间联结性，χ^2统计度量值表明，在162个种对中，147对联结关系未达到显着水平，种间的独立性较大；χ^2检验更加理想地揭示了个别种对存在较强的联结性。（2）Ochiai系数矩阵和Dice系数检验的结果与χ^2检验结果吻合地较好，总体联结性也弱。通过研究数据验证了以上三种检验方法的灵敏程度：χ^2检验〈Dice（1945）指数检验〈Ochiai（1957）指数检验。（3）该群落中随机毗邻的种对占绝大多数（98．41％），正分离种对较少（0．32％），负分离种对也很少（1．27％）。存在正分离的种对：桦叶四蕊槭-小叶鹅耳栎、大叶株木-臭椿，不存在相互为邻的分布特征。大多数种对倾向于随机毗邻。该结果可以较好地印证种间联结的结果，说明锐齿栎群落的优势种群确实存在独立分布的特征。Taking the dominant populations of Quercus aliena var. acuteserrata community in the West of Qinlingwith frequency greater than 35% as research object, this paper researched the interspecific association coefficients of 36 dominant populations using χ^2 test, Ochiai coefficient matrix and Dice coefficient test. The results as followed ： （ 1 ） Theinterspecific associations of 147 pair of dominant pop- ulations by χ^2 test were unremarkable, and which of a few pair of dominant popula- tions were remarkable. （2） Theinterspecific associations by χ^2 test, Ochiai coefficient matrix and Dice coefficient test were similar. The sequence of sensitive degree of three test methods were X2 test 〈 Ochiai coefficient matrix 〈 Dice coefficient test. （3） The species-pairs paired randomly were occupied 98.41%, and the spe- cies-pairs of positive separation or negative separation were occupied 0.32% and 1.27% respectively. The species-pairs of positive separation were Acer tetramerum Pax var. betulifolium-Carpinus turczaninowii Hance var. stipulate and Swida mac-rophylla （Wall.） Sojok-Ailanthus altissima. The dominant populations of Quercus aliena var. acuteserrata community had the independent distribution characteristic.

关 键 词：种间联结 Χ^2检验 秦岭西段 锐齿栎群落 种间分离 

分 类 号：S718.54[农业科学—林学]