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。

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

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二碱基指纹是指全部1 6种二碱基组合在一个序列内的相对丰度。

The dinucleotide signature is the relative abundance of all 16 dinucleotides in a sequence.

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通过对南海表层沉积中钙质超微化石丰度和属种组合的分析，得出化石丰度与水深的关系。

Based on the analyses of abundance and assemblages of calcareous nannoplankton of the surface sediments from the South China Sea, the correlation between the abundance and water depth is found.

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