黑石顶山区植被恢复过程中物种多样性的变化

Study on species diversity of the forest community in the Heishiding mountain area of Guangdong,China

采用时空替代结合样地跟踪的方法，对广东黑石顶自然保护区船底窝的皆伐火烧迹地上永久样地的植被恢复过程（0～50年）中物种多样性的动态变化进行了研究。结果发现：随植被恢复演替的进展，群落的物种多样性总体逐渐升高，优势度趋于下降，而群落的均匀度基本上保持比较高而稳定的状态。运用灰色系统理论对该样地植被演替过程中的物种多样性与主要环境因子之间进行了关联度分析，结果发现多数环境因子对研究地群落物种多样性的影响不太明显，只有群落的透光度对物种多样性的影响相对最大。

The community species diversity dynamics of the early and medium restoration succession stages （0 ～50 a） of the forests in the Heishiding mountain area of Guangdong Province is systematically studied in this paper. Investigations on fixed quadrats combined with the method of the substitution of space for time, are employed in this study. The results show that in general, the community＇s biodiversity increases gradually with the process of the forest restoration succession which evolved from secondary bare lands of clearcut or fired remains to coniferous and broadleaved mixed forest at the early and medium stages of the secondary succession. That is to say, the species diversity raises step by step and the evenness of the forest community remains stable, while the ecological dominance of the communities tends to decline. In addition, it is found that the community＇s transparence imposed strongest impact on species diversity while no significant effect of the other 5 environmental factors on species diversity was detected based on the grey system correlation analysis between 6 dominant environmental factors and 4 species diversity factors.