PDF HTML阅读 XML下载 导出引用 引用提醒 陕北长城沿线植被恢复与生态系统防风固沙服务模拟分析 DOI: 10.5846/stxb202107272038 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金资助项目(41771576,42071285);陕西省2022年重点研发计划项目(2022SF-382);陕西省自然科学基础研究计划资助项目(2018JM4010) Simulation analysis of vegetation restoration and ecosystem wind prevention and sand fixation service along the Great Wall in Northern Shaanxi Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为探究风沙边缘地区植被恢复与生态系统防风固沙服务能力之间的作用机制以及如何保证防风固沙服务的可持续发展,选择毛乌素沙漠边缘地区--陕北长城沿线为研究区。利用Theil-Sen斜率估算、M-K显著性检验、修正风蚀方程(Revised Wind Erosion Equation,RWEQ)和情景分析法,评估分析2000-2018年该地风沙治理工程效果和生态系统防风固沙服务的时空变化,并着重分析在风蚀因子改变的条件下,植被恢复对土壤风蚀和生态系统防风固沙服务能力的影响。结果表明:(1)在2000-2018年风沙治理工程中陕北长城沿线地区植被恢复状况显著改善,表明多年来在风蚀治理工作中取得显著的效果。(2)在实际情景中,随着植被不断的恢复,风蚀发生的危险程度总体在减小,而风蚀因子是导致实际风蚀量显著改变的主要原因。从生态系统防风固沙服务角度出发,在不同年份防风固沙总量变化显著,2005年和2010年防风固沙量达到最小、最大值,分别为4569.18万t和64164.44万t,差异明显,致使2005和2010年防风固沙服务能力也达到历史最低和最高值。(3)通过最小风蚀因子情景模拟间接表明:植被恢复能够遏制风蚀现象的发生。但在最大风蚀因子情景下,风蚀现象依旧明显,而植被所发挥的生态系统防风固沙服务能力越显著。(4)综合上述3种情景,每年潜在风蚀量 > 防风固沙量 > 实际风蚀量,说明在最大危害程度内生态系统防风固沙服务具有明显的效果。通过研究不仅证实植被是实现防风固沙服务功能可持续发展的必要条件,同时恢复植被对风沙区域进一步发展状况与趋势有着至关重要的作用。 Abstract:In order to explore the mechanism between vegetation restoration and the ecosystem service capacity of the wind prevention and sand fixation (WPSF), this study selected the region along the Great Wall of Northern Shanaxi which is in the edge of Maowusu Desert as the study area to ensure the sustainable development of ecosystem WPSF services. By using Theil-Sen slope estimation, M-K significance test, the Revised Wind Erosion Equation (RWEQ) and scenario analysis method, the paper evaluated and analyzed the effects of the implementation of the Sand Dust Control Project and the spatio-temporal change of ecosystem WPSF service in the study area from 2000 to 2018, and focused on the effects of vegetation restoration on soil wind erosion and ecosystem WPSF service capacity under the condition of changing wind erosion factor. The results showed that:(1) the vegetation restoration along the Great Wall of Northern Shanaxi has improved significantly during the period from 2000 to 2018, which indicates that significant effects have been achieved in the Sand Dust Control Project over the years.(2) In the real condition, with the continuous improvement of vegetation restoration from 2000 to 2018, the overall risk of soil wind erosion has been decreasing, and the wind erosion factor is the main reason for the significant change of the actual amount of wind erosion. From the point of view of ecosystem WPSF services, the total amount of WPSF in different years changed significantly. The amount of WPSF reached a minimum of 45.691 million tons in 2005, but a maximum of 641.644 million tons in 2010. As a result, the service capacity of WPSF also reached the lowest and highest levels in 2005 and 2010.(3) Through scenario simulation, it indirectly indicated that vegetation restoration could restrain the occurrence of wind erosion under the condition of the minimum wind erosion factor. However, under the condition of the maximum wind erosion factor, the wind erosion was still serious, and the ecosystem WPSF service ability of vegetation was more significant.(4) Under the three scenarios, the order is the annual potential wind erosion > wind prevention and sand fixation > actual wind erosion, which shows that the ecosystem WPSF service has obvious effect on the maximum disaster risk degree. In a word, the study proves that the vegetation restoration is not only a necessary condition for the sustainable development of ecosystem WPSF service function, but also plays a vital role in the further development of wind-sand region. 参考文献 相似文献 引证文献