野生板栗群落优势树种间竞争研究

The Interspecific Competitions among Dominant Tree Species in Wild Chestnut Community

以太宽河自然保护区野生板栗和伴生的优势树种组成的群落为研究对象,采用Levins测度式求取的种间竞争系数和Lotka-Volterra竞争模型中的K值,研究了野生板栗群落优势树种间的竞争关系。结果表明:在野生板栗群落各优势树种的竞争中,野生板栗种群对其他种群具有抑制作用,野生板栗在空间和资源竞争中处于优势地位,其他伴生树种处于劣势地位,认为这种竞争结果会导致伴生树种逐步被淘汰,从而形成小片纯林或者野生板栗种群占主导地位的混交林群落。

This paper selected the community in Taikuan River Nature Reserve,which is consisting of wild chestnuts and the dominant companion tree species as the study object,using Levins-type measurement to reach the interspecies competition coefficients and the K value of Lotka-Volterra competition model.It studied the competitive relationship between the dominant species in the wild chestnut community.The results demonstrated that in the competition of dominant species within the wild chestnut community,wild chestnuts species produce inhibiting effects over other populations and have absolute advantages in competition for space and resources,the other companion tree species are in an inferior position.It is believed that this competition may result in the progressive elimination of the companion tree species,which will consequently form a small area of pure forest or a mingled forest community where the wild chestnuts play a dominant role.