黄河上游水源涵养区植被恢复合理目标及恢复策略
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国家自然科学基金项目(42171274)


Reasonable target and restoration strategies of vegetation restoration in a water conservation area of the upper Yellow River Basin
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan) (42171274)

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    摘要:

    科学设定植被恢复合理目标,制定适宜可行的恢复策略,充分发挥植被恢复的固碳效益,对提高生态修复效率具有重要的现实意义。以黄河上游水源涵养区这一关键生态功能区作为研究区,以当前实际植被状态为边界条件,利用IBISi(Improved Integrated Biosphere Simulator)模型模拟了近十年平均气候条件下的潜在植被状态,并以该状态下植被净初级生产力为指标,设定了研究区短期植被恢复合理目标,进而估算了区域固碳提升潜力。在此基础上,通过评估植被受损程度,识别了重点恢复区域,并结合生态恢复力及实际植被变化趋势分析,分区分类对植被恢复策略进行了划分。研究结果表明:(1)黄河上游水源涵养区植被净初级生产力恢复目标值平均为295.4 gC m-2 a-1,可在其植被现状的基础上恢复提升7.18%;(2)在当前恢复目标下,研究区植被恢复固碳提升潜力具有明显的空间差异性,存在提升潜力的区域面积占比约为60%,主要分布在龙羊峡以上以及洮河大夏河流域上游地区;(3)研究区植被恢复策略应以保育保护和自然恢复为主,同时应在吉迈水文站以上黄河北岸、共和盆地、龙羊峡库区、贵南沙地、河湟谷地部分区域等重点恢复区,实施必要的人工辅助修复措施。研究结果可为当地因地制宜开展植被恢复工作提供科学依据和决策支持,同时也可为其他区域生态修复规划提供思路和方法借鉴。

    Abstract:

    Setting scientifically reasonable target of vegetation restoration, formulating appropriate and feasible restoration strategies, and maximizing the carbon sequestration benefits of vegetation restoration are of utmost importance in improving the effectiveness of ecological restoration. In this paper, we focused on a key ecological function area of the water conservation area of the upper Yellow River Basin. The Improved Integrated Biosphere Simulator (IBISi) model was used to simulate the potential vegetation state under the average climatic condition of the last ten years by using the current actual vegetation state as the boundary condition. And the short-term reasonable target of vegetation restoration in the study area was set based on the net primary productivity in the potential vegetation state, and the potential improvement of carbon sequestration due to vegetation restoration was then estimated. On the basis of this, priority areas were identified by assessing the degree of damage to the vegetation, and the vegetation restoration strategies for different regions were classified based on the analysis of the ecological resilience and the trend of the actual vegetation change. The results showed that: (1) The average restoration target value for vegetation net primary productivity in the water conservation area of the upper Yellow River Basin was 295.4 gC m-2 a-1, with a potential increase of 7.18% over the current vegetation status. (2) Under the current restoration target, the potential improvement of carbon sequestration in the study area had obviously spatial variability. The areas with significant carbon sequestration potential through vegetation restoration were mainly distributed in the areas above the Longyangxia reservoir and the upper Tao River-Daxia River Basin, accounting for about 60% of the total area. (3) The vegetation restoration strategy in the study area should prioritize conservation and natural restoration. Meanwhile, for key restoration regions such as the northern bank of the Yellow River above the Jimai hydrological station, the Gonghe Basin, the Longyangxia reservoir area, the Guinan sand, and some areas of the Yellow River-Huangshui River valley, the implementation of supplementary artificial restoration measures should effectively support the restoration process. The research findings can provide a scientific basis and decision support for locally tailored vegetation restoration measures, enabling them to be conducted in an appropriate and context-specific manner. In addition, the study can provide valuable insights and methodological references for ecological restoration planning in other regions.

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曹莹,曾彪,张富广,姜榕,沈艳琦.黄河上游水源涵养区植被恢复合理目标及恢复策略.生态学报,2024,44(18):8219~8233

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