重庆涪陵磨盘沟桫椤群落主要种群间联结性研究  

STUDY ON INTERSPECIFIC ASSOCIATION OF THE MAIN POPULATIONS IN ALSOPHILA SPINULOSA COMMUNITY IN MOPAN GULLY OF FULING CHONGQING

作　　者：尚进[1] 李旭光[2] 石胜友[1] 

机构地区：[1]涪陵师范学院生命科学系,重庆涪陵408003 [2]西南师范大学生命科学学院,重庆400715

出　　处：《西南农业大学学报（自然科学版）》2003年第6期471-474,共4页Journal of Southwest Agricultural University

基　　金：国家自然科学基金项目资助(39570130)

摘　　要：根据2×2联列表,应用方差分析、Χ2-检验、Ochiai指数、Dice指数和Jaccard指数,研究了重庆市涪陵磨盘沟桫椤(Alsophilaspinulosa)群落中19个主要种群间的联结性。并以半矩阵和星座图形式表达测度结果:除少数种对外,多数种群间的联结性不显著;桫椤-石生楼梯草(Elatostemampertre)、羊耳菊(Inulacappa)-乌蕨(Enomerischinen sis)、新月蕨(Abacopterisaspera)-石生楼梯草、艳山姜(Alpiniazerumbet)-石生楼梯草种对间有较高的正联结;桫椤-芒萁(Dicranopterisdichotoma)、桫椤-华里白(Hicripterischinensis)、紫马唐(Digitariaviolasens)-茅叶荩草(Arthraxonprionodes)种对间表现出极显著的负联结。这说明由于群落尚处在恢复初期,且人为干扰较大,因而,群落结构发育不完善,种间关系还不稳定。Variance analysis, X^2 test, Ochiai index, Dice index and Jaccard index, which are based on 2×2 contingency table, were used to study the inter-specific association of 19 main populations of Alsophila spinulosa community in Mopan Gully, Fuling, Chongqing. The results were expressed in the form of semi-matrix and constellation figures. The inter-specific association was not significant in most species-pairs except a few. Close positive inter-specific association was observed in the following species pairs: Alsophila spinulosa-Elatostema mpertre, Inula cappa-Enomerus chinensis; Abacopteris aspera-E. mpertre, and Alpinia zerumbet-E. mpertre. Significant negative association existed in the following species-pairs: A. spinulosa-Dicranopteris dichotoma, A. spinulosa-Hicripteris chinensis and Digitaria violasens- Arthraxon prionodes. These results indicate that the populations are in an early stage of rehabilitation and subjected to human interference and, as a result, their development is not perfect and the inter-specific relationship is not yet stable.

关 键 词：桫椤群落 种群 种间联结性 涪陵区 重庆 

分 类 号：Q948.121[生物学—植物学]