四川康定折多山濒危药用植物桃儿七群落主要种间联结性研究

Studies on main interspecific association of rare and endangered medicinal plant Sinopodophyllum hexandrum community in Kangding Zheduo mountain of Sichuan province

在2×2列联表基础上,采用方差分析,χ2检验,OI,DI,JI指数、方差/均值比的t检验和Morisita指数的F检验对四川康定折多山桃儿七所在植物群落中的20个优势种的种间关联和空间分布格局进行定量分析。结果表明,该区域桃儿七所在群落中20个优势种的总体关联性呈不显著的正关联,反映出群落处于稳定成熟阶段,各种间独立性较强,20个优势种组成的190个种对中,有2个极显著正联结,12个显著正联结,无极显著负联结,6个显著负联结,桃儿七在群落中无显著相关,在群落中独立性较强,桃儿七群落的分布格局服从随机分布。

Based on the 2 × 2 contingency table , by using multi-species relevance （ variance ratio, VR ） , X2-test, Ochiai in- dex, Dice index, Jaccard index, t-test of v/x and F-test of Morisita, s index, the interspecific relationships and the spatial distribution pattern between 20 dominants in Kangding Zheduo Mountain of Sichuan province were studied. The results indicated that the interspe- cific association between dominants of Sinopodophyllum hexandrum community in this area did not show significant association, which suggested that the S. hexandrum community was in mature stage, and showed stronger independency, among total 190 pairs in 20 dom- inant species, 2 species pairs exhibited extremely significantly positive association, 12 species pairs showed significantly positive association, 6 species pairs exhibited significantly negative association and there were no pairs showed extremely significantly negative association. S. hexandrum in community did not show significant association, which indicates they are independent in community, the spatial distribution pattern of S. hexandrum is characterized by random distribution.