大熊猫栖息地地震干扰后恢复群落的中性理论验证

为了验证中性理论在干扰后恢复群落中的适用性,本文利用不同地震干扰强度下大熊猫栖息地恢复群落的野外调查数据进行了中性理论的验证。预测发现,在干扰较重及未受干扰的原始林群落中,中性理论模型能够较好地预测物种多度分布,但在干扰相对较轻的恢复群落中中性理论模型预测物种多度分布效果较差。原因分析表明,生境的均一性程度是影响中性理论模型预测物种多度分布效果的重要影响因子。因此可认为,中性理论不适用于生境均一性差的群落。

Validation of neutral theory in studying restored plant communities in giant panda habitats after earthquake disturbance

To validate the applicability of neutral theory in studying the restored plant communities after disturbances, a validation was made on this theory, based on the investigation data of the richness-abundance of restored plant communities in giant panda habitats after the disturbances of different intensity earthquakes. It was observed that neutral theory model could be better predict the species-abundance distribution pattern in the primary forest communities rather severely or not disturbed, but had little effect in predicting this distribution pattern in the primary forest communities under medium disturbances. The homogeneity degree of habitats could be one of the important factors affecting the fitness of the neutral theory model, and thus, neutral theory was considered not fitting the plant communities in poorly homogeneous habitats.