摘要
河西走廊作为我国重要的生态安全屏障,其生态分区研究对河西走廊实现精准修复、优化资源配置有重要意义。本研究通过估算河西走廊的生态系统服务价值,借助“源地-阻力面-廊道-战略点”的基本范式构建出河西走廊的生态安全格局,并耦合景观生态风险评估结果划定生态分区,优化生态安全格局。结果表明:2000—2020年,研究区生态质量向好;其生态系统服务价值共增加157.41亿元;高生态风险区面积减少14324 km^(2),中、低生态风险区面积分别增加4778、9546 km^(2)。研究区生态要素在空间分布上具有一致性,主要位于河西走廊的南部。识别出生态源地10个,面积为20643.12 km^(2);提取生态廊道45条,长度为2685.69 km,其中,重要生态廊道15条,长度为1053.16 km;共识别出生态战略点64个。本研究将河西走廊划分为生态保障区、生态整治区、生态改善区和生态保育区4个生态分区,其中,生态源地、廊道主要位于生态保障区、生态保育区。研究结果可为河西走廊乃至西北地区的生态修复研究提供理论参考。
Hexi Corridor is an important ecological security barrier in China.Ecological zoning of this area is of great significance for the precise restoration and optimal resource allocation.We estimated the ecosystem service value of the Hexi Corridor and constructed ecological security pattern with the basic paradigm of“source-resistance surface-corridor-strategic point”.We further coupled the results of the landscape ecological risk assessment to deli-neate ecological zoning and optimize the ecological security pattern.The results showed that ecological quality in the study area improved from 2000 to 2020,with total ecosystem service value increasing by 15.741 billion yuan.The area with high ecological risk decreased by 14324 km^(2),and the area with medium and low ecological risk increased by 4778 and 9546 km^(2),respectively.The ecological components exhibited consistent spatial distribution,primarily concentrated in the southern part of the Hexi Corridor.Ten ecological source areas were identified,covering 20643.12 km^(2).A total of 45 ecological corridors were extracted,totaling 2685.69 km in length,including 15 key ecological corridors spanning 1053.16 km.We identified 64 ecological strategic points.Hexi Corridor could be classified into four ecological zones:ecological safeguard zone,ecological rehabilitation zone,ecological improvement zone,and ecological conservation zone.The ecological sources and corridors were mainly located in the ecological safeguard zone and ecological conservation zone.Our results could provide theoretical references for ecological restoration research in the Hexi Corridor as well as in the northwestern China.
作者
陈春阳
贾夏
赵永华
单立山
司绍诚
赵明
张鹏
CHEN Chunyang;JIA Xia;ZHAO Yonghua;SHAN Lishan;SI Shaocheng;ZHAO Ming;ZHANG Peng(College of Land Engineering,Chang’an University,Xi’an 710054,China;College of Water and Environment,Chang’an University,Xi’an 710054,China;Key Laboratory of Land Conso-lidation of Shaanxi Province,Xi’an 710054,China;Key Laboratory of Degradation and Unused Land Remediation Engineering of the Ministry of Natural Resources,Xi’an 710054,China;College of Forestry,Gansu Agricultural University,Lanzhou 730070,China)
出处
《应用生态学报》
北大核心
2026年第1期213-222,共10页
Chinese Journal of Applied Ecology
基金
国家自然科学基金联合重点项目(U23A2061)
陕西省科技创新团队项目(2024RS-CXTD-55)资助。
关键词
河西走廊
生态安全格局
生态系统服务价值
景观生态风险
Hexi Corridor
ecological security pattern
ecosystem service value
landscape ecological risk
