Integrating vegetation suitability in sustainable revegetation for the Loess Plateau, China.
Integrating vegetation suitability in sustainable revegetation for the Loess Plateau, China.
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DOI：
10.1016/j.scitotenv.2020.143572
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Cong Wang;Shuai Wang;B. Fu;Y. Lü;Yuanxin Liu;Xing Wu
中科院分区：
文献类型：
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作者：
Cong Wang;Shuai Wang;B. Fu;Y. Lü;Yuanxin Liu;Xing Wu
由于植被恢复有利于生态系统恢复、防治荒漠化和减缓气候变化，全球植被恢复正在加速。近几十年来，黄土高原水土流失严重，为了防治水土流失，开展了“退耕还林”等植被恢复工程。人工种植园分布不合理，造成植被退化、土壤干燥、水流减少等负面后果。确定合适的植物种类对于指导植被恢复计划的设计至关重要，并且可能有助于划定人工种植园的合适边界。在这项研究中，我们使用生态水文模型来量化两种典型的植被恢复物种（刺槐和针茅）的适宜性，并使用开发的植被适宜性方程来估计用水/水分胁迫的权衡。结果表明，R.假金合欢对水分胁迫比金合欢更敏感。邦吉亚纳。两个物种的用水量随降水梯度而变化，并且S。一般来说，白皮松的用水量高于红花椒。假金合欢。适合R的区域。假刺槐主要分布在高原东北部。通过覆盖 R 的合适边界。结合目前的土地覆盖情况，我们发现分布在不适宜地区的森林面积达到了整个黄土高原的7.31%。适宜边界以外的森林退耕还草会增加产水量（0.51%~12.23%），并略微降低土壤保持能力（0.01%~0.08%），从而实现可持续植物-土壤生态系统和水土保持的“双赢”。另外，R的合适面积。根据预测的未来干燥趋势，假金合欢预计会萎缩。综上所述，未来植被恢复工程规划设计应考虑植被适宜性，以有效应对黄土高原环境退化和气候变化的影响。
Revegetation is accelerating globally due to its benefits for ecosystem restoration, desertification prevention, and climate change mitigation. The Loess Plateau has suffered serious erosion in the past decades, and revegetation projects, such as those under the ‘Grain for Green’ program, have been conducted for soil erosion prevention. The irrational distribution of artificial plantations had negative consequences, including vegetation degradation, soil drying, and decreases in streamflow. Determining the suitable plant species is critical in guiding the design of revegetation programs and may help delimit the suitable boundaries for artificial plantations. In this study, we used an eco-hydrological model to quantify the suitability of two typical revegetation species (Robinia pseudoacaciaandStipa bungeana) using a developed vegetation suitability equation, which estimates the water use/water stress trade-off. The results showed thatR. pseudoacaciawas more sensitive to water stress thanS. bungeana. The water use of both species varied along the precipitation gradient, andS. bungeanagenerally had a higher water use thanR. pseudoacacia. Suitable areas forR. pseudoacaciawere mainly located in the northeastern part of the plateau. By overlaying the suitable boundaries forR. pseudoacaciaon the current land cover, we found that the area of forests distributed in unsuitable regions reached 7.31% of the entire Loess Plateau. Converting forests beyond the suitable boundary to grasslands would increase the water yield (0.51%–12.23%) and slightly decrease the soil retention capacity (0.01%–0.08%), resulting in a ‘win-win’ situation for sustainable plant-soil ecosystems and soil-water conservations. Additionally, the suitable area ofR. pseudoacaciais predicted to shrink under projected future drying trends. In conclusion, vegetation suitability in the future planning and design of revegetation projects should be considered to effectively tackle the impacts of environmental degradation and climate change in the Loess Plateau.