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新疆典型干旱区矿区不同植被恢复方法成效比较以新疆阿尔泰山两河源自然保护区为例

Comparison of outcomes of different vegetation restoration methods in mining areas of typical arid regions in Xinjiang: a case study of Xinjiang Altai Mountains Two-riversource Nature Reserve

  • 摘要:
    目的 评估不同恢复措施对矿区植被恢复的有效性,探索为干旱区矿区植被恢复模式优化提供支撑。
    方法 选取典型干旱区矿区新疆阿尔泰山两河源自然保护区库尔木图营林区矿区,采用样方法对不同恢复措施下的8个采矿迹地恢复样区开展植被调查,记录各样地物种组成,计算物种多样性指标。以矿点周边原始植被为参考,对比分析恢复样地与参考样地群落相似性,评估了覆土、泥浆拌种、人工撒种、补种小灌木、羊群驻扎种等不同恢复措施下的恢复成效。
    结果 ①超过一半的恢复样地物种多样性超过参考样地;②采取覆土+人工撒种+泥浆拌种措施的样地植被盖度恢复成效显著;③覆土和泥浆拌种与盖度存在较强的正相关,人工撒种措施与恢复样地和参考样地物种多样性指标差异之间存在负相关性。
    结论 覆土和泥浆拌种措施对植被盖度恢复有显著作用,人工撒种和羊群驻扎在提升物种多样性方面发挥效果。建议在未来人工撒种措施中,筛选优化物种组成,进一步提升恢复效果。

     

    Abstract:
    Objectives This study aimed at evaluating the effectiveness of various restoration measures on vegetation restoration in mining areas, in order to provide a foundation for the enhancement of vegetation restoration methodologies in arid regions.
    Methods A typical case, the Kuermutu mining area of Altai Mountains Two-riversource Nature Reserve in Xinjiang was selected for this study. We investigated the plant community structure of eight mining sites under different restoration measures. The amounts, relative abundances and heights of each species were recorded in each randomly selected plot. Subsequently, the alpha diversity indices were calculated. Taking the original plant communities around the mine sites as references, the community similarities between the restoration and the reference sample plots were analyzed to evaluate the effectiveness of different restoration measures, including soil covering, seed sowing, mud seed dressing and herding.
    Results The species diversity of more than half of the restored plots was higher than that of the reference plots. The plots under soil covering, seed sowing, and mud seed dressing represented significant restoration effectiveness in terms of vegetation coverage. A strong positive correlation was identified between vegetation coverage with soil covering and mud seed dressing. A negative correlation was found between sowing measures and the discrepancy in species diversity indices between restoration and reference plots.
    Conclusions The measures of seed dressing with mud and soil covering play a significant role in the restoration in terms of vegetation coverage. The measures of sowing and sheep stationing have been demonstrated to be effective in improving species diversity. It is suggested that in the future, the sowing measures be optimized by selecting the most suitable species of seed to enhance the effectiveness of the restoration process.

     

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