长江下游平原区生态网络识别与优化——以常州市金坛区为例  

Identification and optimization of ecological network in the plain area of the lower Yangtze River:A case study of Jintan District,Changzhou

作　　者：张晓琳 金晓斌[1,2,3] 韩博 孙瑞 梁鑫源 李寒冰 周寅康 ZHANG Xiaolin;JIN Xiaobin;HAN Bo;SUN Rui;LIANG Xinyuan;LI Hanbing;ZHOU Yinkang(College of Geographic and Oceanographic Sciences,Nanjing Univeraity,Nanjing 210023,China;Key Laboratory of Coastal Zone Exploitation and Protection,Ministry of Natural Resources,Nanjing 210023,China;Jiangsu provincial land development and consolidation technology and Engineering Center,Nanjing 210023,China)

机构地区：[1]南京大学地理与海洋科学学院,南京210023 [2]自然资源部海岸带开发与保护重点实验室,南京210023 [3]江苏省土地开发整理技术工程中心,南京210023

出　　处：《生态学报》2021年第9期3449-3461,共13页Acta Ecologica Sinica

基　　金：国家科技支撑计划项目(2015BAD06B02);自然资源部海岸带开发与保护重点实验室开放基金项目(2019CZEPK02)。

摘　　要：生态网络识别与优化是保障区域生态安全格局,开展国土空间生态保护修复的重要研究手段。立足图论和景观生态学理论方法,以长江下游平原区的金坛区为例,利用遥感影像、土地利用数据、POI数据等,通过最小面积阈值、最佳距离阈值分析,识别了区域现状生态网络,开展了生态盲区指导下的生态网络优化,并对优化前后的生态网络性能、区域生境斑块重要性进行评价,取得以下研究结果:(1)开展生态盲区指导下生态网络优化,可显著提升区域景观连接度,且在生态水网区域具有较强适用性;(2)研究区存在生态景观断裂,生态网络布局亟待优化,经优化Harary指数增加了10.92倍,整体连接度指数提升了43.45%,可能性连接度指数提升了99.58%;(3)国土空间生态保护修复应重点关注关键区域整治,可采取重点斑块生态保护、关键节点生态修复、特殊区域生态建设等差异化生态网络修复策略。Identification and optimization of ecological networks is an important research method to ensure the regional ecological security pattern and carry out the ecological protection and restoration of national land space.Based on theories of graph and landscape ecology,this paper took Jintan District in the lower reaches of the Yangtze River as an example,and used the remote sensing images,land use data,POI data,etc.Through the minimum area threshold and the optimal distance threshold analysis,the current ecological network of the region was identified,the ecological network under the guidance of the ecological blind zone was carried out,and the ecological network performance before and after optimization the importance of regional habitat patches was evaluated.This paper obtained the following results:(1)under the guidance of the ecological blind zone,ecological network optimization can significantly improve the connectivity of regional landscape and has strong applicability in ecological water network areas.(2)There are ecological landscape fractures in some areas of research area,and the ecological network layout needs to be optimized.The optimized Harary index increased by 10.92 times.The overall connectivity index increased by 43.45%,and the possibility connectivity index increased by 99.58%.(3)National land space ecological protection and restoration should focus on key areas,and adopt the strategies of important patches ecological protection,key nodes ecological restoration,and special regions ecological construction for ecological network restoration.

关 键 词：生态网络 布局优化 生态盲区 区域生态安全 金坛区 

分 类 号：X321[环境科学与工程—环境工程]