生态位理论在临洮县生态恢复效应评价中的应用

通过调查临洮县南屏山、东山造林站区域植物群落中16种共同出现的种群生态位特征值，计测Shannon-Wiener生态位宽度和Petraitis特定重叠指数，并进行t测验。结果表明:1)两区域Shannon-Wiener生态位宽度特征值差异不显著，表明两个群落中种群竞争关系差异不显著，即资源位差异不显著，或尚未呈现资源不足;2)两区域Petraitis特定重叠指数特征值差异极显著，表明两个群落对资源的利用状况有极显著差异，即两种生态恢复模式的生态学效果差异极显著。3)不同群落中相同种群间的Shannn-Wiener生态位宽度和Petraitis特定重叠指数，可量化在不同强度干扰下植物群落中植物种群对资源的利用状况，可以利用生态位理论评价生态恢复效应，拓展生态恢复效应评价的结构体系。

Applications of the niche theory in ecological restoration evaluation

Using a series of indices proposed by Levins, Shannon-Wiener and Petraitis, the eigenvalue of niches for 16 plant population which existed in Nanping mountain and Dongshan afforestation station were investigated in the present paper. No significant difference presented in the niches breadths in two regions which showed that the competition relationship between the two population was not obvious and there was no significant difference in environmental resources. Significant differences existed in the Petraitis' overlapping indices which showed that there were significant effects on the ecological vegetation restoration patterns of these population. Shannon-wiener niche breadth and Petraitis specific overlap indices can be explored to evaluate the competition and resource utilization status among different plant communities, and it could reflect the characteristics of ecology which plant communities response to artificial interference. The niche theory could be used to evaluate the effect of ecological restoration.