摘要
[目的]内蒙古察汗淖尔流域作为京津冀地区抵御浑善达克沙地南侵的最后一道防线,是我国北方生态安全屏障建设的重要组成部分,该地区生态系统具有敏感性和脆弱性,开展生态系统健康评价研究对察汗淖尔流域可持续发展具有重要意义。[方法]本研究基于遥感影像数据,分析1990-2020年察汗淖尔流域土地利用时空变化特征,运用VORS模型构建流域生态系统健康评价指标体系,定量评估流域生态系统健康状况及其时空演变特征,进一步结合响应弹性和耦合协调度分析土地利用变化与生态系统健康之间的关系。[结果](1)耕地和草地是察汗淖尔流域最主要的土地利用类型,二者约占流域面积的85%以上,近30年间,林地和建设用地持续扩张,耕地呈逐年减少趋势,主要向林地和草地转移;(2)流域生态系统以健康水平为主,生态系统健康状况整体呈先恶化后逐渐好转的变化特征,生态系统健康指数由0.491上升至0.505;(3)草地、湿地和水体对生态系统健康的影响程度较高,生态弹性指数分别为65.43、3.63和12.36,林地与生态系统健康呈中度不协调关系,严重失调区域以湿地、水体为主,研究期内,林地和建设用地与生态系统健康的耦合协调度有所提升。[结论]自2000年后,内蒙古察汗淖尔流域生态系统健康状况有所好转,但仍处于生态脆弱区,有必要重视土地利用变化对生态系统健康的影响,研究结果可为察汗淖尔流域生态系统保护及修复提供科学参考。
[Objective]As the last line of defensing against the southward encroachment of the Hunshandake Sandy Land in the Beijing-Tianjin-Hebei region,the Chahannaoer Basin in Inner Mongolia is an important component of the ecological security barrier in Northern China.The ecosystem in this area is highly sensitive and vulnerable,making research on ecosystem health assessment of great significance for the sustainable development of the Chahannaoer Basin.[Methods]Based on remote sensing data,this study analyzed the spatio-temporal variation characteristics of land use in the Chahannaoer Basin from 1990 to 2020.The VORS model was employed to construct an ecological health assessment index system,quantitatively evaluating the health status and its spatio-temporal evolution of the basin’s ecosystem.Additionally,the relationship between land use chang⁃es and ecosystem health was further examined through resilience response and coupling coordination analysis.[Results](1)Cultivated land and grassland were the dominant land use types in the Chahannaoer Basin,which accounted for over 85%of the to⁃tal area.Over the past three decades,forestland and construction land continued to expand,while cropland showed a decreasing trend,primarily transitioning into forestland and grassland.(2)The Basin’s ecosystem was generally healthy,with its overall health status initially deteriorating before gradually improving.The ecosystem health index increased from 0.491 in 1990 to 0.505 in 2020.(3)Grassland,wetland,and water bodies had a significant impact on ecosystem health,with ecological resil⁃ience indices of 65.43,3.63,and 12.36,respectively.Forestland exhibited a moderately uncoordinated relationship with eco⁃system health,while severely incoordination areas were mainly wetlands and water bodies.During the study period,the cou⁃pling coordination between forestland,construction land,and ecosystem health was improved.[Conclusion]Since 2000,the ecosystem health of the Chahannaoer Basin in Inner Mongolia has shown signs of recovery,but it remains an ecologically fragile area.It is essential to emphasize the impact of land use changes on ecosystem health.The findlings of this study can provide sci⁃entific references for the protection and restoration of the ecosystem in the Chahannaoer Basin.
作者
张子萱
郑颖
郭建英
王语馨
Zhang Zixuan;Zheng Ying;Guo Jianying;Wang Yuxin(College of Desert Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station,China Institute of Water Resources and Hydropower Research,Hohhot 010020,China;Institute of Pastoral Hydraulic Research,MWR,Hohhot 010020,China)
出处
《山西农业大学学报(自然科学版)》
北大核心
2025年第3期85-99,共15页
Journal of Shanxi Agricultural University(Natural Science Edition)
基金
内蒙古自治区科技计划项目(2022YFHH0024)
中国水科院基本科研业务费项目(MK0145B022021)。
