Species Abundance in a Forest Community in South China:a Case of Poisson Lognormal Distribution |
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出 版 社：Acta Botanica Sinica |
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发表时间：2005 |
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台 站：鼎湖山森林生态系统定位研究站 |
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作 者：Yin Zuoyun，Ren Hai*，Zhang Qianmei，Peng Shaolin，Guo Qinfeng，Zhou Guoyi
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点 击 率：612121 |
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关 键 字(英文)：Dinghushan Biosphere Reserve; forest community; maximum likelihood estimate (MLE);reverse J-shaped curve; species abundance distribution (SAD); value-trying method;zero-truncated Poisson lognormal (PLN) distribution. |
| 摘 要(英文)：Case studies on Poisson lognormal distribution of species abundance have been rare,especially in forest communities. We propose a numerical method to fit the Poisson lognormal to the species
abundance data at an evergreen mixed forest in the Dinghushan Biosphere Reserve, South China. Plants in the tree, shrub and herb layers in 25 quadrats of 20 m×20 m, 5 m×5 m, and 1 m×1 m were surveyed. Results indicated that: (i) for each layer, the observed species abundance with a similarly small median, mode, and a variance larger than the mean was reverse J-shaped and followed well the zero-truncated Poisson lognormal; (ii) the coefficient of variation, skewness and kurtosis of abundance, and two Poisson lognormal parameters ( σ and µ) for shrub layer were closer to those for the herb layer than those for the tree layer; and (iii) from the
tree to the shrub to the herb layer, the σ and the coefficient of variation decreased, whereas diversity increased. We suggest that: (i) the species abundance distributions in the three layers reflects the overall community characteristics; (ii) the Poisson lognormal can describe the species abundance distribution in diverse communities with a few abundant species but many rare species; and (iii) 1/ σ should be an alternative measure of diversity. |
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 Species Abundance in a Forest Community in South China：A Case of Poisson Lognormal Distribution.pdf |
