人工-天然杉阔混交林种群生态位及竞争研究

Study on the Niche and Competition of Populations in Man-natural Mixed Forest of Cunninghamia lanceolata and Broadleaf Trees

对人工 -天然杉阔混交林中 4个主要种群进行生态位研究 ,定量测定混交林中主要种群生态位宽度、生态位相似比例、生态位重叠 ,并分析了各种群生态位的生态学意义 ;同时采用Lotka_Volterra竞争方程研究混交林中主要种群。结果表明 :通过定量的生态位分析 ,结果与自然规律相符合。平衡时 ,杉木和米槠相对优势度分别为87 4 5 %和 12 5 5 % ,即人工 -天然杉阔混交林仍将由杉木、米槠两种种群共优组成 ,杉木种群支配整个群落。

The paper dealt with the niche characteristics of 4 main tree populations in man_natural mixed forest of %C.lanceolata% and broadleaf trees. The niche breadth, niche proportional similarity and niche overlap of main tree populations were determined, and the ecological significance of results were analyzed. Meanwhile the main populations in man_natural mixed forest were studed by the Lotka_Volterra equation of competition. The results showed that the relative dominance of %Cunninghamia lanceolata% and %Castanopsis carlesii% was respectively 87.45% and 12.55% when the stand reaches balance, i.e.those two species can jointly dominate a community and the whole community would be controlled by %Cunninghamia lanceolata% population.