摘要
[目的]为科学评估鄱阳湖生态经济区生境质量并构建生态安全格局,对生态修复提出科学建议。[方法]以2003年、2013年、2023年鄱阳湖生态经济区多源遥感和土地利用数据为基础,结合遥感生态指数、形态空间格局分析与电路理论,系统评估区域生境质量时空演变规律,构建“源地-廊道-夹点-障碍”协同优化的生态安全格局。[结果]1)研究区生境质量总体较高(RSEI平均值为0.75~0.79),但呈“中部退化、边缘稳定”的空间分异特征。2)基于MSPA识别出重要生态源地(16个)分布于九江、景德镇、鹰潭等植被覆盖率高的生态优势区,一般生态源地(41个)呈斑块状分布于生态经济区中部过渡带与边缘缓冲带,二者共同支撑区域生物多样性。3)基于电路理论识别119条生态廊道及关键节点,共同优化区域生态网络结构与功能。关键廊道纵向贯通中部高阻力区与边缘生态区,保障生态连通性;重要廊道环状连接三大生态源地,维持系统稳定性;一般廊道网状填充间隙,提升网络密度。南昌-上饶生态夹点区与宜春市中部和吉安市西北部障碍点分布区属于安全格局重点关注区域,对研究区生态红线划定具有决定性意义。[结论]研究提出“源地保护-廊道连通-夹点调控-障碍修复”机制,为鄱阳湖流域生态红线划定“一带两区三屏”的国土空间规划科学策略。
[Objective]To scientifically evaluate the habitat quality of the Poyang Lake Eco-Economic Zone,construct an ecological security pattern,and provide scientific recommendations for ecological restoration.[Methods]Based on the multi-source remote sensing and land use data of the Poyang Lake Eco-Economic Zone in 2003,2013 and 2023,combined with the remote sensing ecological index,morphological spatial pattern analysis,and circuit theory,the spatiotemporal evolution patterns of regional habitat quality were systematically evaluated.Additionally,the ecological security pattern of"source-corridor-pinch point-barrier"collaborative optimization was constructed.[Results]1)The habitat quality in the study area was generally high(average RSEI value of 0.75−0.79),but it showed spatial differentiation characteristics of"degraded in the middle and stable at the edge".2)Based on MSPA,16 important ecological sources were identified and distributed in ecologically advantageous areas with high vegetation coverage such as Jiujiang,Jingdezhen,and Yingtan.41 general ecological sources were distributed in patches in the transition zone and marginal buffer zone in the middle of the eco-economic zone,which jointly supported regional biodiversity.3)Based on circuit theory,119 ecological corridors and key nodes were identified to jointly optimize the structure and function of the regional ecological network.The key corridors vertically connected the central high-resistance area and the marginal ecological area to ensure ecological connectivity.The important corridors connected the three ecological sources in a ring to maintain system stability.The general corridors filled the gaps in a mesh-like pattern to enhance network density.The Nanchang-Shangrao ecological pinch point and the barrier point distribution area in central Yichun City and northwestern Ji'an City were the key areas of the ecological security pattern,playing a decisive role in delineating the ecological red line of the study area.[Conclusion]This study proposes a restoration mechanism of"source protection-corridor connectivity-pinch point regulation-barrier restoration",providing a scientific land spatial planning strategy of"one belt,two zones,and three screens"for delineating the ecological red line of the Poyang Lake Basin.
作者
奥勇
李敏
赵永华
丁志豪
倪赟
黄福星
AO Yong;LI Min;ZHAO Yonghua;DING Zhihao;NI Yun;HUANG Fuxing(School of Land Engineering,Chang'an University,Xi'an 710054,China;Shaanxi Key Laboratory of Land Consolidation,Xi'an 710054,China;Key Laboratory of Degraded and Unused Land Consolidation Engineering,Ministry of Natural Resources,Xi'an 710054,China)
出处
《水土保持学报》
北大核心
2026年第1期231-241,共11页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(U23 A2061)。
关键词
遥感生态指数
电路理论
生态安全格局
鄱阳湖生态经济区
remote sensing ecological index
circuit theory
ecological security pattern
Poyang Lake Eco-Economic Zone
