缙云秋海棠与主要伴生物种的种间关联性研究

以缙云山特有珍稀植物缙云秋海棠(Begonia jinyunensis)为研究对象,基于方差比率法、χ~2统计量和W检验,结合关联程度指数Ochiai(OI), Dice(DI), Jaccard(JI),研究缙云秋海棠与其主要伴生物种间的相互作用及关联性,旨在推进对特有珍稀濒危植物的保护和利用.研究结果表明:1)缙云秋海棠的14个主要伴生物种分属于12个科14个属. 2)缙云秋海棠7个群落多物种间总体关联性均呈正相关,其中6个有统计学意义,群落处于相对稳定状态. 3)缙云秋海棠和主要伴生物种形成的26个物种对中, 16个种对呈正相关,其中仅1对为正相关有统计学意义; 10个种对为负关联,其中1对负相关有统计学意义,1对负相关极有统计学意义.多数种对间关联性无统计学意义,物种趋于独立分布. 4)正关联种对间联结性较弱,负关联种对间联结相对较紧密,总体而言种间联结仍较为松散.从本次种间关联性研究来看,缙云秋海棠与主要伴生物种间相容性良好,尚未出现资源危机,各物种共同进化,群落稳定发展.即群落中物种间的相互作用不是缙云秋海棠濒危的主要原因.

On Interspecific Association for Begonia Jinyunensis and Its Major Associated Species

In order to explore the reasons of Begonia jinyunensis in danger from the perspective of interspecific association, Begonia jinyunensis has been taken as the research object, on the basis of variance analysis,2-Statistics and W tests, as well as Ochiai index, Dice index, and Jaccard index in our survey, trying to clarify the interaction and correlation between B. jinyunensis and its concomitant species. Only then could we provide a reference for the protection and utilization of endemic endangered species. The results shows as follows:1) A total of 14 major plants are found to accur near B. jinyunensis, which are among 14 genus of 12 families. 2) All of the seven communities appears to be positive correlation, of which 6 reach significant levels, and the communities are all in stable states. 3) In the 26 species pairs of the 16 main plants in the communities, there are 16 species present a positive correlation, of which only one pair reaches significant level, 10 pairs are negatively related, in which there are one pairs of significant negative correlations and one pairs of an extremely significant negative correlation Most species don''t reach significant level, tending to distribute independently. 4) The species pairs of the community mostly show a positive correlation, but the connectivity is weak. However, the species pairs in negative correlation are few, while their connectivity is strong. In general, interspecific connectivity between species is still weak. That is to say, there is no resource crisis and the community has developed steadily, and the interactions among species in community are not the main cause for Begonia jinyunensis''s endangered state.