中文摘要：

构建区域生态安全格局、优化城市群生态空间结构,有利于促进社会经济与生态环境的和谐发展。以中国西部关中城市群为例,在RS与GIS技术支持下,通过生态服务重要性与生态环境敏感性评价识别生态源地,并基于最小累积阻力模型构建区域生态安全格局,进而开展生态空间结构优化布局研究。结果表明：（1）生态保护源地面积共26191.19 km~2,占全区的47.51%;（2）除生态源地外,低、中、高水平安全格局区域分别占全区的39.14%、9.86%和3.49%;（3）源间廊道多呈南北走向且连通成网状的程度较低;（4）提出构建以＂四带、三区、七组团、十廊道、多中心＂为核心的＂绿心廊道组团网络式＂布局体系,优化关中城市群生态空间结构。本研究可为区域生态保护与城市群可持续发展提供参考与借鉴。

英文摘要：

Constructing regional ecological security pattern, as well as optimizing the eco- spatial structure in urban agglomerations, will promote the harmonious development of the social economy and ecological environment. Based on RS and GIS technology, the study takes the Guanzhong urban agglomeration in western China as an example to identify the ecological source area according to the importance of ecosystem services and eco-environment sensitivity evaluation. We constructed the regional ecological security pattern by using the minimum cumulative resistance model, and optimized the layout of eco-spatial structure in the region. Results showed that： （1） the ecological source area was 26191.19 km2, accounting for 47.51% of the region＇s area; （2） except the ecological source region, the areas of low, moderate and high level ecological lands accounted for 39.14%, 9.86% and 3.49%, respectively; （3） the corridors between the ecological source region lie mostly in south-north directions and have low connectivity; （4） we aimed to construct the system of ＂the mode of corridor group network with green cores＂ with ＂four belts, three regions, seven groups, ten corridors, and multi centers＂, so as to optimize the optimization layout. This study provides a reference case for regional ecological protection and sustainable development of urban agglomerations.