气候变化下河西走廊生态系统健康时空变化及应对策略  

Spatial and temporal variations in ecosystem health and coping strategy in the Hexi Corridor under climate change

作　　者：李洁[1,2] 刘春芳 LI Jie;LIU Chunfang(School of Management,Northwest Normal University,Lanzhou 730070,China;Gansu Province Engineering Research Center of Land Use and Comprehensive Improvement,Lanzhou 730070,China)

机构地区：[1]西北师范大学管理学院,兰州730070 [2]甘肃省土地利用与综合整治工程研究中心,兰州730070

出　　处：《应用生态学报》2025年第2期537-546,共10页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(42461037);甘肃省科技重大专项(23ZDKA0004);甘肃省科技计划资助项目(22JR5RA603)资助。

摘　　要：生态系统健康状况是全球气候变化适应性决策的基础,也是保障区域生态系统稳定的基本前提。本研究以河西走廊为研究区,从系统完整性和贡献力角度构建基于贡献力-活力-组织力-恢复力模型的生态系统健康评价指标体系,并运用双变量Moran指数分析了2000-2020年生态系统健康时空演变特征及其与气候变化的关系。结果表明:2000-2020年间,河西走廊生态系统健康指数提升了2.5%,其中,中部绿洲区、东南部山地区生态健康状况改善明显,而北部荒漠区及局部地区有所恶化。研究期间,河西走廊生态系统整体呈中等健康水平,各分维度与整体生态健康状况一致,均呈先下降后上升的变化态势。气候变化与生态系统健康之间存在显著的空间正相关。在干旱少雨的河西走廊地区,年均降水量增加、年均气温升高对生态系统健康有促进效应,是影响该区生态系统健康的关键因素。最后,针对南部祁连山地区、中部绿洲区、北部荒漠区3类地域提出了针对性的策略,以提升其生态系统健康水平。The health status of ecosystems is the foundation for global climate change adaptation decision-making and a fundamental prerequisite for ensuring regional ecosystem stability. We constructed an ecosystem health assessment indicator system based on a contribution, vigor, organization and resilience model from the perspectives of system integrity and contributive capacity. With this system, we analyzed the spatial-temporal variation of ecosystem health in Hexi Corridor and its relationship with climate change from 2000 to 2020 by utilizing the bivariate Moran's index. Results showed that the ecosystem health index in the Hexi Corridor improved by 2.5% during 2000-2020. The central oasis area and the southeastern mountainous area showed significant improvement in ecological health, while the northern desert area and some localized regions experienced degradation. During the study period, the overall health status of the Hexi Corridor's ecosystem remained at a moderate level, with consistent trend across various dimensions that initially declined before subsequently rising. There was a significant spatial positive correlation between climate change and ecosystem health. In the arid and low-precipitation condition of the Hexi Corridor, increased average annual precipitation and elevated average annual temperature contributed positively to ecosystem health, which was the key determinants of regional ecosystem health. Finally, we proposed corresponding strategies for enhancing ecosystem health levels in the southern Qilian Mountain area, the central oasis areas, and the nor-thern desert areas.

关 键 词：生态系统健康 贡献力-活力-组织力-恢复力模型 气候变化 河西走廊 

分 类 号：P467[天文地球—大气科学及气象学] X826[环境科学与工程—环境工程]