城市扩张背景下生态用地格局与生态效率的多尺度关联分析  

Multi-scale correlation analysis of ecological land use pattern and ecological efficiency under urban expansion

作　　者：马才学 杨蓉萱 柯新利 马智宇 张超正 唐兰萍 MA Caixue;YANG Rongxuan;KE Xinli;MA Zhiyu;ZHANG Chaozheng;TANG Lanping(College of Public Administration,Huazhong Agricultural University,Wuhan 430070,China;College of Management,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]华中农业大学公共管理学院,湖北武汉430070 [2]广东海洋大学管理学院,广东湛江524088

出　　处：《生态科学》2022年第5期1-10,共10页Ecological Science

基　　金：国家自然科学基金项目(41971240,42101307)。

摘　　要：探寻生态用地景观格局演变对生态效率的影响规律对于合理配置生态用地、促进城市可持续发展具有重要的指导意义。运用生态效率度量模型、空间自相关分析和景观指数,分别探讨2005—2015年三大城市群生态效率时空分布特征及生态景观格局演变规律,并基于空间杜宾模型实证分析行政区和主城区不同尺度下的生态用地景观格局对生态效率的影响。研究结果表明:(1)城市扩张使生态用地面临较高的转化风险,绿地作为优势生态用地,是建设用地蚕食的主要用地类型;(2)主城区尺度下的生态用地景观格局对生态效率的影响比行政区尺度更为显著,对主城区内的生态用地景观格局进行调控更能发挥效果;(3)绿地景观格局对生态效率的影响比水域更为突出,降低主城区绿地破碎度,提高单个斑块优势度比提高绿地总面积更有利于促进城市生态效率。由此可认为主城区尺度下的绿地优化调控在城市规划中应给予重视,在无法避免蚕食绿地时,应尽可能侵占小斑块绿地,以确保自然生态保护区等大斑块绿地的生态优势地位。Exploring the impacts of ecological-landscape dynamics on eco-efficiency can provide guides to rational allocation of ecological land and sustainable urban development.Firstly,based on the methods of eco-efficiency model,spatial autocorrelation analysis,and landscape indices,the spatial-temporal patterns of eco-efficiency and the ecological-landscape dynamics were shown in the three major urban agglomerations of China between 2005 and 2015.Then,we assessed the impacts of ecological-landscape dynamics on eco-efficiency at scales of the administrative area and the main urban area by the spatial Durbin model.The results show that:1)there is a higher risk of ecological land conversions due to urban expansion.Green land,as a dominant type of ecological land,is the main type that is encroached by construction land.2)Compared with the administrative scale,the ecological-landscape pattern has more significant impacts on eco-efficiency at the scale of the main urban area.This means regulating the ecological-landscape pattern within the main urban area can be more effective.3)The influence of green land patterns on eco-efficiency is more significant than that of the water body pattern.Furthermore,compared with increasing the total area of green land in main urban areas,reducing the landscape fragmentation of green land and increasing the dominance of a single patch is more conducive to improving eco-efficiency.In conclusion,attention should be paid to the optimization of green land at the scale of the main urban area in urban planning.When the encroachment on green land cannot be avoided,it is more reasonable for occupying small patches of green land to ensure the ecological superiority of large patches of green land such as the natural environment protection area.

关 键 词：生态效率 生态用地景观格局 多尺度分析 空间杜宾模型 三大城市群 

分 类 号：X24[环境科学与工程—环境科学]