自然资源学报 ›› 2019, Vol. 34 ›› Issue (11): 2389-2402.doi: 10.31497/zrzyxb.20191111

• 资源生态 • 上一篇    下一篇

西北干旱区生态承载力监测及安全格局构建

张学渊1, 魏伟1, 颉斌斌2, 郭泽呈1, 周俊菊1   

  1. 1. 西北师范大学地理与环境科学学院,兰州 730070;
    2. 兰州城市学院/旅游学院,兰州 730070
  • 收稿日期:2019-04-21 修回日期:2019-08-03 出版日期:2019-11-28 发布日期:2019-11-28
  • 通讯作者: 魏伟(1982- ),男,甘肃兰州人,博士,副教授,主要从事资源环境遥感和GIS的应用研究。E-mail: weiweigis2006@126.com
  • 作者简介:张学渊(1995- ),男,山西晋中人,硕士,主要从事资源环境遥感和GIS的应用研究。E-mail: 714347818@qq.com
  • 基金资助:
    国家自然科学基金项目(41861040,41761047)

Ecological carrying capacity monitoring and security pattern construction in arid areas of Northwest China

ZHANG Xue-yuan1, WEI Wei1, XIE Bin-bin2, GUO Ze-cheng1, ZHOU Jun-ju1   

  1. 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
    2. School of Urban Economics and Tourism Culture, Lanzhou City University, Lanzhou 730070, China
  • Received:2019-04-21 Revised:2019-08-03 Online:2019-11-28 Published:2019-11-28

摘要: 以西北干旱区为研究区,通过引入生态环境弹性力、资源环境供容力、社会经济压力三个准则层,建立了生态承载力综合评价体系。在此基础上运用空间主成分分析法(SPCA)对西北干旱区2000年、2007年、2012年、2016年四期生态承载力时空变化进行监测评估,进而构建生态安全格局。研究结果表明:西北干旱区生态承载力以弱承载为主,且在研究时段弱承载区面积不断下降,而强承载区面积有上升趋势;从空间分布看,河西地区、北疆地区、内蒙古西部地区生态承载力呈上升趋势,而南疆地区则有所下降;利用MCR模型提取道路型廊道、河流型廊道、绿色廊道共51条,总长度7285.43 km;提取重要斑块区节点、河流湿地区节点、生态脆弱区节点等共71个。根据计算结果将西北干旱区划分为16个生态安全格局,并结合生态承载力变化情况,对现有的安全格局进行布局优化,以期为西北干旱区生态环境的保护和恢复治理提供科学参考。

关键词: 生态承载力, 时空演变, 生态安全格局, 优化, 西北干旱区

Abstract: In this paper, ecological function elasticity, resource supply and environmental capacity, social and economic pressure rule of three layers are used to set up a comprehensive evaluation system of ecological carrying capacity. On this basis, the spatial principal component analysis (SPCA) is used in the arid areas of Northwest China covering 2000, 2007, 2012 and 2016 to examine spatial and temporal variations so as to monitor the ecological carrying capacity evaluation, and construct ecological security pattern. The results show that the ecological carrying capacity of the study area is mainly weak bearing, and the area of the weak bearing area is decreasing, while the area of the strong bearing area is increasing. In terms of spatial distribution, the ecological carrying capacity of Hexi region, Northern Xinjiang and Western Inner Mongolia is on the rise, while that of Southern Xinjiang is in the decline. The MCR model was used to extract 51 road-type corridors, river-type corridors and green corridors, with a total length of 7285.43 km, and 71 nodes in important patch area, river wet area and ecological fragile area were extracted. According to the calculation results, the arid areas of Northwest China are divided into 16 ecological security patterns, and the existing security patterns are optimized according to the changes of ecological carrying capacity.

Key words: spatial and temporal evolution, optimization, ecological carrying capacity, ecological security pattern, arid areas of Northwest China