|Importance evaluation of ecological conservation based on ecological network optimization：a case study of Shaanxi Province
|英文关键词: importance of ecological protection, ecosystem regulation function, ecological sensitivity, ecological network, Shaanxi Province
| 生态保护重要性评价是开展生态保护工作的科学基础。本研究基于自然资源数据库对陕西省生态保护重要性进行评价，在此基础上使用生态网络分析的方法对生态保护重要性评价结果进行优化，进而构建陕西省生态保护空间格局。结果表明：陕西省生态系统调节功能极重要区面积为67 562.30 km2，占全省总面积的32.8%，主要分布在秦巴山地、关山和子午岭地区；生态极敏感区面积为13 260.88 km2，占全省总面积的6.4%，主要位于黄土高原地区。研究区内包括30处生态源地和106处生态节点，呈现出南多北少、西多东少的分布特点，103条生态廊道则以南北纵向分布为主。利用生态网络对生态保护重要性初始评价结果进行优化，识别并增加3.3%生态保护极重要区域。全省生态保护极重要区面积为84 362.30 km2，占全省总面积的40.97%。基于生态保护重要性评价优化结果，可构建点-线-面相结合的网络状生态保护空间格局。本研究通过叠加分析和生态网络相结合的方法构建区域生态保护格局，可以有效提高生态保护与修复区域划定的准确性和科学性。
| Evaluation of the importance of ecological protection is the scientific basis of ecological protection. Based on a natural resource database, this paper evaluates the importance of ecological protection in Shaanxi Province, China. With this basis, the ecological network analysis method was used to optimize the evaluation results of the importance of ecological protection, and then the spatial pattern of ecological protection in Shaanxi Province was constructed. The results show that the extremely important area of ecosystem regulation function in Shaanxi Province is 67 562.30 km2, accounting for 32.8% of the total area of the province. It is mainly distributed in the Qinba Mountains, Guanshan Mountains, and Ziwuling Mountains. The eco-sensitive area, accounting for 6.4% of the total area of the province, is 13 260.88 km2 and is mainly located in the Loess Plateau. The 30 ecological source areas and 106 ecological nodes in the study area have the distribution characteristics of being more abundant in the south and west and less abundant in the north and east. The 103 ecological corridors are mainly distributed in the north–south direction. The ecological network was used to optimize the initial evaluation results of the importance of ecological protection, and 3.3% of the extremely important area was identified and increased. The extremely important area of ecological protection in the province is 84 362.30 km2, accounting for 40.97% of the total area of the province. Based on the optimization results of the ecological protection importance evaluation, a network spatial pattern of point–line–surface ecological protection can be constructed. This study constructed a regional ecological protection pattern by combining superposition analysis and ecological network construction, which can effectively improve the accuracy and scientificity of ecological protection and restoration area delineation.