<正>对卫闽光皮桦群落的８个主要伴生树种进行了生态位宽度、生态位重叠度以及生态位分离度测定。结果表明，该群落中的优势树种其生态位宽度值均普遍较大，在理论上均可属于广生态位。优势种之间的竞争颇为激烈，如果不进行一定的人为措施，目前主要伴生树种之间这种暂时的资源共享、和平共存局面，将难以维持。

In order to probe into the range of distribution of the adventageous species of Fujian Betula luminfera community and discuss their inferrelation of niche factors, in this paper, the niche breadth, niche overlap and niche departure of Weiming Betula luminifera community’s eight main simpsons were determined. The result shows that the niche breadth of the advantageous species of the community is generally wide which therioetically belongs to wide_niche breadth, Moreover, the competence among the advantageous spieces is fairly severe. If there are no human measurements, the present situation of the transient mutual share of resources and peaceful exsistence of the main simpsons will be hard to be maintained.