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恢复方式及时间对季风常绿阔叶林群落特征的影响

Effect of Restoration Strategy and Time on Community Characteristic of Monsoon Evergreen Broad-leaved Forest

  • 摘要: 通过对云南普洱地区季风常绿阔叶林皆伐后人工和天然恢复15 a及30 a群落的调查,并以原始林群落为对照,对比分析了恢复方式和恢复时间对季风常绿阔叶林恢复群落的结构和多样性的影响。结果表明:恢复方式对科、属、物种、乔木、灌木、藤本等物种组成和多样性情况无显著影响,而恢复时间则具有显著的影响。科、属、物种、乔木及灌木物种丰富度随着恢复时间的延长呈现先减后增的趋势。所有群落物种丰富度均随径级和高度级的增加而呈现倒"J"型分布,多度则随径级增加呈现偏峰曲线,而随高度级的增加呈现倒"J"型分布。恢复方式和恢复时间与群落结构与多样性变量之间的相关性分析及回归分析表明:恢复时间与多数变量之间具有显著的相关性,而恢复方式则仅与藤本多度具有显著相关性,这说明与恢复方式相比,恢复时间是影响该地区恢复群落结构和多样性的主要因子。

     

    Abstract: The effects of restoration strategy and time on community structure and diversity were analyzed by investigating species composition, structure, and diversity of different restoration strategies and time communities. The results showed that restoration strategy had no effect on species composition and diversities of family, genera, species, tree, shrub, and liana, however, restoration time had significant effect on species composition and diversity. Species richness of family, genera, species, tree, and shrub decreased at the early stage and then increased with community succession. Species richness showed an inverse J-shape with DBH increasing in all community types, while abundance showed single peak curve with DBH increasing and an inverse J-shape with height increasing. The correlation and regression analysis among restoration strategies and times and variables of community structure and diversity showed that there were significant correlation between restoration time and variables of community structure and diversity, and no significant correlation were found between restoration strategy and most of variables of community structure and diversity, which indicated that restoration time was the major factor that affected the structure and diversity of community restored.

     

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