摘要
构建区域生态安全格局是实现生态环境可持续发展的重要途径,人类活动使当前自然地域生态安全面临严重威胁。为建立自然地域生态安全格局,以具有典型山地垂直地带性的秦岭(陕西段)为研究对象,运用粒度反推法评价景观格局最佳组分,构建InVEST生境质量模型及综合阻力面,运用电路理论提取生态廊道、生态夹点、生态障碍点及生态断裂点,结合土地利用现状提出针对性修复治理建议。结果表明:研究区内66处生态源地呈现出明显的西部集聚成片、东部分散稀疏的空间分布特征。共识别出119条宽度为1 200 m的生态廊道、102处生态夹点、72处生态障碍点及58处生态断裂点;生态廊道、生态夹点和生态障碍点的用地类型仍有待整治,耕地面积占比分别为26.75%、23.80%和31.66%。结合土地利用现状,提出积极推行退耕还林、还草工作,加强城乡绿地建设,推动乡村振兴转型发展,对生态断裂点实行动态监测、设立标示牌等针对性治理措施。受自然环境及人类活动共同影响,秦岭境内生态待修复区主要集中在商洛和安康。研究结果为识别生态待修复区与构建山地区域生态安全格局提供参考。
Constructing the pattern of regional ecological security is an important way to realize the sustainable development of the ecological environment,which seriously threatens the ecological security of natural areas.To establish the natural regional ecological security pattern,this study took the Qinling Mountains(Shaanxi section)with typical vertical zonality as the research object.The granularity of backstepping method was used to evaluate the best components of landscape pattern,and the InVEST habitat quality model and comprehensive resistance model were built.Ecological corridors were extracted through circuit theory,and the ecological pinch points,ecological disturbances,and ecological breakpoints were determined based on the present situation of land use repair management.The results showed that the 66 ecological sources in the study area showed obvious spatial distribution characteristics,which were concentrated in the west and scattered and sparse in the east.In addition,there were 119 ecological corridors with widths of 1200 m,102 ecological pinch points,72 ecological barriers,and 58 ecological breakpoints.The land types of the ecological corridors,ecological intersections,and ecological barriers still needed to be renovated,and the proportion of cultivated land area was 26.75%,23.80%,and 31.66%,respectively.Targeted measures were suggested based on the current situation of land use,such as the need to actively return farmland to forest or grassland,strengthen the construction of urban and rural green spaces,promote the transformation and development of rural revitalization,carry out dynamic monitoring of ecological breakpoints,set up signs,and other measures.Due to the joint influence of the natural environment and human activities,the ecological restoration areas in the Qinling Mountains are mainly concentrated in Shangluo and Ankang.The research results provide the reference for identifying ecological security areas that need to be restored and for constructing ecological security patterns in mountainous areas.
作者
杜雨阳
王征强
于庆和
杨永崇
张全文
DU Yuyang;WANG Zhengqiang;YU Qinghe;YANG Yongchong;ZHANG Quanwen(College of Surveying and Mapping Science and Technology of Xi′an University of Technology,Xi′an 710054,China;Baoji Survey and Mapping Institute,Baoji 721000,China;Heilongjiang Forestry Design and Research Institute,Harbin 150080,China;College of Civil Engineering of Shangqiu Institute of Technology,Shangqiu 476000,China)
出处
《农业资源与环境学报》
CAS
CSCD
北大核心
2022年第5期1069-1078,共10页
Journal of Agricultural Resources and Environment
基金
国家自然科学基金项目(41501571)。
关键词
区域生态安全格局
生态廊道
生境质量模型
最小累计阻力模型
电路理论
regional ecological security pattern
ecological corridor
habitat quality model
minimum cumulative resistance model
circuit theory
