But the research by Crowder, an insect ecologist at Washington State University in Pullman, and his colleagues, shows the importance of 'evenness' - the relative abundance of different species.

但是华盛顿州立大学的昆虫生态学家克劳德的研究显示平衡的重要性——各种物种相对充盈。

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Results indicate that the distribution of species relative abundance of paleocommunity is similar to that of living community and both have logarithmic normal distribution.

文章指出古群落和现代群落的种的相对丰度具有类似的分布，即对数正态分布。

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Due to lack of trees and population competition, species that are rare or with high relative abundance constitute only a small proportion.

具有较高丰富度的种类仅占很少部分，可能与乔木缺乏和种群竞争有关。

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