摘要
【目的】构建基于生态系统服务供需的国土空间生态网络,以期为实施国家生态安全战略以及保障区域生态系统服务的稳定性和可持续性提供参考。【方法】以赣州市为例,基于InVEST模型、最小累积阻力模型和电路理论等方法,选取水源涵养、碳固持、土壤保持和食物供给确定生态源地,综合自然、社会和经济要素构建综合阻力面并在此基础划定生态廊道和提取生态战略点,最终构建耦合生态系统服务供需的国土空间生态网络。【结果】(1)生态系统服务综合供需比整体呈现西、南部高值,东、北部低值的空间分布,供给在总量上均可满足需求,但从空间上看,除碳固持服务基本满足外其余生态系统服务城市可持续能力不强;(2)供给源地总面积4646.88 km^(2),呈现“西南两地聚集、东北两地稀缺”的格局,需求源地总面积442.87 km^(2),绝大部分为建设用地;(3)源间生态廊道和需求廊道分别为59条和28条,总长达到2872.86 km,部分廊道较长且穿过高阻力带,易发生断裂,需加强廊道建设;(4)生态战略点134处,作为未来城市生态建设优先考虑的关键节点。【结论】本研究在基于生态系统服务供需构建生态网络的方法和思路方面均有所改进,可为实现区域生态-社会协同发展及加强生态文明建设提供空间指引。
[Objective]This study aims to construct a national spatial ecological network based on the supply and demand of ecosystem services,thus providing a reference for the implementation of the national ecological security strategy and ensure the stability and sustainability of regional ecosystem services[.Method]Taking Ganzhou city as an example,this study used the InVEST model,the Minimum Cumulative Resistance model,and Circuit Theory to select four types of ecosystem services including water conservation,carbon storage sequestration,soil conservation and food supply to determine the ecological source areas.Based on natural,social,and economic factors,a comprehensive resistance surface was created to delineate ecological corridors and extract ecological strategic points,ultimately constructing a national spatial ecological network that couples the supply and demand of ecosystem services.[Result](1)The overall spatial distribution of the comprehensive supply-demand ratio of ecosystem services showed high values in the west and south,and low values in the east and north.Although the supply could meet the demand in terms of total quantity,the urban sustainability of other ecosystem services was not strong,except for carbon sequestration services.(2)The total area of supply source areas was 4646.88 km^(2),presenting a pattern of“agglomeration in the southwest and scarcity in the northeast.”The total area of demand source areas was 442.87 km^(2),most of which were construction lands.(3)There were 59 inter-source ecological corridors and 28 demand corridors,with a total length of 2872.86 km.Some corridors were long and crossed high-resistance zones,which were prone to fractures and required strengthening of corridor construction.(4)There were 134 ecological strategic points,which should be prioritized as key nodes for future urban ecological construction.[Conclusion]This study has improved the methods and ideas of constructing ecological network based on ecosystem service supply and demand,which can provide spatial guidance for realizing regional eco-social coordinated development and strengthening the construction of ecological civilization.
作者
胡隆
饶敏欣
罗志军
冯晓菁
HU Long;RAO Minxin;LUO Zhijun;FENG Xiaojing(College of Land Resources and Environment,Jiangxi Agricultural University,Nanchang 330045,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2023年第4期1038-1050,共13页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(41961042)
教育部人文社会科学研究规划基金项目(19YJAZH061)。
关键词
生态系统服务
供需匹配
MCR模型
电路理论
生态网络
ecosystem services
supply and demand matching
MCR model
circuit theory
ecological network
