突脉青冈林主要植物种群的竞争研究

在突脉青冈及其伴生树种为优势种组成的阔叶林中,以其优势度为环境容纳量,采用重要值百分数求取群落内的种间竞争系数,用Lotka-Volterra竞争方程研究突脉青冈林共优种群(突脉青冈与其伴生树种)的种间竞争关系。结果表明:在平衡状态下,突脉青冈、少叶黄杞、罗浮栲的相对优势度分别为10.19%、20.47%和69.35%,说明未来的突脉青冈林仍将由罗浮栲、少叶黄杞、突脉青冈为共优组成,而罗浮栲种群将支配整个群落。

A Study on interspecific Competition of Main Plant Population in Cyclobalanopsis elevaticostata Forest

In the broadleaved forests which were composed of Cyclobalanopsis elevaticostata and its accompanying species,taking the dominance as the environmental carrying capacity,calculating the interspecific competition coefficient by using percentage of importance value,the interspecific competition between Cyclobalanopsis elevaticostata and its accompanying species was studied.The results showed that at the steady state,the relative dominance of Cyclobalanopsis elevaticostata,Englhardtia fenzelii and Castanopsis fabri were 10.19 %,20.47 % and 69.35 %,which indicated that Castanopsis fabri,Englhardtia fenzelii and Cyclobalanopsis elevaticostata would be the dominant species in Cyclobalanopsis elevaticostata forest in the future,Castanopsis fabri would be the most dominant species.