粤港澳大湾区生态功能网络构建及对策
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  • 英文篇名:The Construction of an Ecological Function Network and Its Application in the Greater Bay Area, China
  • 作者:丁宇 ; 张雷 ; 曾祥坤
  • 英文作者:DING Yu;ZHANG Lei;ZENG Xiang-kun;School of Economic and Management of Beijing Jiaotong University;Institute of Geographic Sciences and Natural Resources Research/Chinese Academy of Sciences;LAY-OUT Planning Consultants Co.Ltd.;
  • 关键词:城市群 ; 景观格局 ; 生态功能网络 ; 粤港澳大湾区
  • 英文关键词:urban agglomeration;;landscape pattern;;ecological function network;;the Greater Bay Area
  • 中文刊名:NCST
  • 英文刊名:Journal of Ecology and Rural Environment
  • 机构:北京交通大学经济管理学院;中国科学院地理科学与资源研究所/中国科学院区域可持续发展分析与模拟重点实验室;深圳市蕾奥规划设计咨询股份有限公司;
  • 出版日期:2019-04-15 11:25
  • 出版单位:生态与农村环境学报
  • 年:2019
  • 期:v.35;No.173
  • 基金:国家自然科学基金(41571518)
  • 语种:中文;
  • 页:NCST201905004
  • 页数:9
  • CN:05
  • ISSN:32-1766/X
  • 分类号:31-39
摘要
生态安全格局构建是快速城市扩张背景下缓解生态保护和土地开发矛盾、保障区域生态安全的有效途径。生态源地识别与空间阻力面构建一直是生态安全格局构建中的技术难点。以粤港澳大湾区为研究对象,利用1980、1995和2010年3期遥感影像数据,分析土地利用景观格局变化,提取生态源地,采用最小累积阻力模型判定生态廊道,从而综合构建生态功能网络。结果表明:(1)研究区土地利用景观格局变化剧烈,林地始终保持较大优势度,耕地、林地的斑块结合度和聚集度不断下降,破碎化程度有所增加,景观整体趋于不稳定。(2)湾区生态源地总面积约为2 638. 3 km~2,潜在生态廊道长约705 km,整体生态环境有所改善,但是珠江口东部地区生态连通性差。(3)基于保障自然生态系统的需求,生态源地建设应以北部连绵山体生态屏障和南部海岸等为基底,建设高质量的连片森林,统筹协调跨区域的山林屏障带建设,改善生态源地连通度并提升区域生态系统服务,建设世界级森林城市群。
        Ecological security patterns are important for the optimal allocation of ecological resources,and for restricting the expansion of cities. In order to implement effective protection for maintaining ecological safety in urban agglomeration,it is important to plan and support regional green space. Currently,technical difficulties in studying ecological security patterns are linked to the identification of ecological sources and the construction of spatial resistance surfaces. RS and GIS technology were used to identify ecological landscape types and landscape patterns in the urban agglomeration of the Greater Bay Area using data from 1980,1995 and 2010. Ecological source patches were identified by evaluating ecosystem service importance. A regional ecological network was constructed using the minimum cumulative resistance model and the layout of eco-spatial structure in the region was optimized. Results show that:(1)forestland was the dominant landscape in the study area. The land-use landscape tended to be unstable,with fragmentation increasing and the index of COHESION and AI of farmland and forestland decreasing;(2)the area of ecological sources was approximately 2 638. 3 km~2,with the ecological source areas accounting for 9% of the forestland. The key ecological corridors,distributed in a branch shape with a radial pattern,were 705 km long. Although the overall ecological environment has improved,distribution was uneven,especially for the connectivity of the ecological corridors to the east of the Pearl River area;(3)in order to enhance the integrity and penetration of the natural ecosystem,it is proposed that to construct a high quality continuous forest based on the northern mountainous ecological barrier and the southern coast forest. At the same time,it is important to coordinate the construction of a cross-regional forest barrier belt to improve connectivity of ecological sources and to enhance regional ecosystem services.
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