摘要
在国家生态安全发展战略背景下,如何构建以自然保护地斑块和生态廊道为关键要素的区域生态网络已成为我国自然保护地体系建设中亟需探讨的问题。本研究以加强自然保护地斑块间生态联系为视角,以广州市域为例,通过Invest模型、连通性分析、电路理论模型、图论网络结构评价等方法识别生态资源斑块、生态廊道与生态节点,构建以自然保护地为主体的广州市域生态网络。结果表明:研究区域共识别生态资源斑块52处,斑块总面积为1450.01 km^(2),其中,自然保护地面积占比76.4%,为生态资源斑块的主体部分;识别出生态廊道115条,总长度为900.56 km,平均长度为7.83 km;识别72个生态关键点,生态关键点区域总面积为17.57 km^(2);生态断点区域81处,总面积为35.9 km^(2);网络结构指数α=0.65、β=2.21、γ=0.77,网络结构较为合理,连通性良好。本研究探讨了自然保护地体系下区域生态网络构建路径,丰富了电路理论模型生态网络构建,可为区域生态安全和生物多样性保护提供科学依据。
In the context of the national ecological security development strategy,constructing regional ecological networks centered on protected areas and ecological corridors has become an urgent issue in protected areas system development of China.We focused on strengthening ecological connections between protected areas in Guangzhou,identified the ecological resource patches,ecological corridors,and ecological nodes by using Invest model,connectivity analysis,circuit theory models,and graph-theoretical network structure evaluation,and constructed an ecological network for the Guangzhou with nature reserves as the core.The results showed that 52 ecological resource patches were identified in the study area,covering a total area of 1450.01 km^(2).Nature reserves accounted for 76.4%of the total area,forming the main part of the ecological resource patches.115 ecological corridors were identified,with a total length of 900.56 km and an average length of 7.83 km.Furthermore,72 ecological key points were identified,covering a total area of 17.57 km^(2),and 81 ecological breakpoints,with a total area of 35.9 km^(2).The network structure indices(α=0.65,β=2.21,andγ=0.77)indicated a reasonably structured and wellconnected network.By exploring pathways for constructing regional ecological networks under the protected areas system and enriching the application of circuit theory models in ecological network construction,this study provides scientific basis for regional ecological security and biodiversity conservation.
作者
黄俊达
黄金玲
陈超劲
HUANG Junda;HUANG Jinling;CHEN Chaojin(Guangzhou Urban Planning and Design Survey Research Institute,Guangzhou 510000,China;Guangzhou Xinhua University,Guangzhou 510000,China;National Park Research Center,Guangzhou University,Guangzhou 510000,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2024年第1期247-254,共8页
Chinese Journal of Applied Ecology
基金
广州市城市规划勘测设计研究院科研基金项目(2023-80)资助。
关键词
生态网络
生态资源斑块
生态廊道
自然保护地
广州
ecological network
ecological resource patch
ecological corridor
protected area
Guangzhou
作者简介
通信作者:黄俊达,男,1997年生,硕士研究生。主要从事城乡生态规划研究。E-mail:lajunda@163.com。
