水土保持研究2024，Vol.31Issue(2)：287-298,309,13.DOI:10.13869/j.cnki.rswc.2024.02.007
武陵山区国土空间开发对生态安全影响的时空异质性研究
Spatial and Temporal Heterogeneity of the Impact of Territorial Development on Ecological Security in Wuling Mountain Area
摘要
Abstract
[Objective]The aim of this study is to reveal the spatial and temporal patterns of nonlinear impact of changes in territorial development intensity on the evolution of ecological security,provide a scientific basis for promoting the high-quality development of the Wuling Mountain Area,and to build a strong ecolog-ical security barrier in the upper reaches of the Yangtze River.[Methods]The Wuling Mountain Area,a national key ecological functional area,was taken as the research object,the comprehensive assessment sys-tem of territorial development intensity and ecological security was firstly constructed.Then the spatial Du-bin model was used to analyze the spatial spillover effect of territorial development intensity on ecological security.The threshold model was used to clarify the nonlinear relationship between the two under multiple constraints.[Results]The mean value of territorial development intensity increased from 0.195 in 2000 to 0.273 in 2020,and the mean value of ecological security index increased from 0.282 in 2000 to 0.438 in 2020,both of which showed an increasing trend of fluctuation.There was a positive spatial spillover effect between territorial development intensity and ecological security.The spillover effect of territorial development intensity on the exponential growth of ecological security in this county was significantly stronger than that in neighboring counties,overall driving the positive evolution of ecological security level in Wuling Mountain Area.The improvement of territorial development intensity had interval effect on ecological security,showing an inverted U-shaped curve relationship of'strengthening-weakening'.If the threshold value was between 0.158 to 0.309,the territorial development had a significant threshold effect on building the ecological security barrier.[Conclusion]During the study period,the territorial development intensity and its threshold in the Wuling Mountain Area gradually increased,and there was obvious spatial and temporal heterogeneity in the degree of impact on ecological security,so that setting the territorial development intensity interval according to local conditions became the key to optimizing the new pattern of land spatial development and protection.关键词
国土空间开发/生态安全/时空异质性/武陵山区Key words
territorial development/ecological security/spatial and temporal heterogeneity/Wuling Mountain Area分类
管理科学引用本文复制引用
陈勤昌,王兆峰..武陵山区国土空间开发对生态安全影响的时空异质性研究[J].水土保持研究,2024,31(2):287-298,309,13.基金项目
国家自然科学基金(41771162,41971188) （41771162,41971188）
湖南省国内一流培育学科建设项目(5010002) （5010002）
