武夷山米槠林优势种群的竞争格局及动态模拟

Competitive Pattern and Dynamics Simulation of Dominant Population in Castanopsis carlessi Forest in Wuyishan Mountains

用重要值百分数求取种间竞争系数 ,以优势种群在纯林中的优势度为其容纳量 ,采用Lotka- Volterra竞争方程探讨武夷山米槠林的 4种优势种群 (米槠、杨梅叶蚊母树、罗浮栲、黄瑞木 )的竞争格局 .结果表明 :平衡状态时 ,米槠、杨梅叶蚊母树、罗浮栲和黄瑞木相对优势度分别为 5 7.1 0 %、 5 .69%、 33.5 4 %、 3.67% ,即米槠和罗浮栲占据主林冠层 .同时模拟不同尺度的人为干扰 ,结果表明不同尺度的干扰对群落稳定性的影响都不显著 。

In this paper, the percentages of important value of Castanopsis carlessi, Distylium myricoides, Castanopsis fabri and Adinandra millettii are regarded as the measure of the competitive coefficience, and the dominant degree of normal standes are regarded as their environment capacity, then competitive pattern of the four species are discussed with the Lotka Volterra equation The results show that the relative dominance of C carlessi, D myricoides, C fabri and A millettii are 57 10%, 5 69%, 33 54%, 3 67% respectively when reaching their balance, and the whole community is controlled by C carlessi and C fabri population Moreover, the different scales of disturbance are simulated The results show that the different scales of disturbance have no significent effects on the community, which can provide theoretical basis and information for C carlesii forest protection and management