川鄂连蕊茶种群生殖力分析

Analysis of Camellia rosthorniana populations fecundity.

以空间代替时间 ,对缙云山三种群落类型中的川鄂连蕊茶种群的大小结构进行了调查 .在编制静态生命表的基础上 ,研编了川鄂连蕊茶种群的生殖力表、生殖表 ,剖析了构成川鄂连蕊茶生态对策的几个重要组成部分 .结果表明 ,川鄂连蕊茶种群在常绿阔叶林中寿命最长 ,适合度最大 ;生殖值Vx 极大值出现的时间与群落的稳定性相反 .生殖值Vx、剩余生殖值RRV以及整个生活史总生殖值TRV的各累积值与r值变化一致 .川鄂连蕊茶总体上属于k对策者 ,但在稳定性较差的生境中 ,各生殖参数发生变化 。

With the method of space substituting time,the structure of Camellia rosthorniana populations in three forest communities,i.e.,Jiant bamboo forest,coniferous and broad-leaved mixed forest,and evergreen broad-leaved forest in Mt.Jinyun was investigated,and based on static life-tables,the fecundity tables and reproductive value tables of C. rosthorniana populations were constructed.Each reproductive parameter and its relation to bionomic strategies of C. rosthorniana populations were also analyzed.The results indicated that in evergreen broad-leaved forest,C. rosthorniana population had the longest life span and the greatest fitness. The stage of maximum reproductive value increased with increasing stability of the community. The sum of each population's reproductive value,residual reproductive value and total reproductive value for the whole life-history of C. rosthorniana also increased with increasing maturity of the community,showing their inherent relationships with reproductive fitness.As regards to bionomic strategy,C. rosthorniana showed mainly the characteristics of a k-strategies,but in less stable community,the reproductive parameters were greatly changed,showing some characteristics of a r-strategies.