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１９９３～１９９５年在塞罕坝用条带统计法研究了人工针叶林鸟类群落的垂直结构，结果表明，人工针叶林鸟类群落结构存在明显的空间变化，群落物种多样性、均匀性随栖位和栖息高度而变化，并对密度最大的４种鸟类的生态位宽度和生态位重叠值进行了测算
From 1993 to 1995, the vertical structure of artificial coniferous bird communities was studied by statistic method in Saihanba. The results showed that there were obvious spatial changes in the community structure of artificial coniferous forests, the species diversity and evenness With the habitat and habitat height changes, and the density of the four species of birds niche breadth and niche overlap was calculated