基于形态学空间格局和空间主成分的贵阳市中心城区生态网络构建
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贵州大学

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国家自然科学基金(32060367);贵州省科学技术基金重点项目(黔科合基础[2020]1Z011);贵州省科技支撑计划项目(黔科合支撑[2021]一般458)


Construction of ecological network in central urban area of Guiyang city based on morphological spatial pattern and spatial principal component analysis
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Guizhou University

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    摘要:

    喀斯特多山地区,城市扩展过程中大量自然山体镶嵌入城,形成具有多种生态系统服务功能的城市遗存自然山体。但在城市内部致密化发展过程中,这些城市遗存山体常被城市建设用地包孤立和包围,形成人工干扰场中的生态孤岛。生态网络的构建既有利于城市遗存自然山体自然资源保护,又有助于丰富城市绿色基础设施生态系统服务功能。以喀斯特地区典型的多山城市——贵阳市行政区为研究对象,综合利用形态学空间格局分析法(Morphological Spatial Pattern Analysis,MSPA)和景观连通性识别中心城区生态源地,基于主成分分析确定研究区综合阻力面,通过最小累计阻力模型(Minimum Cumulative Resistance,MCR)、重力模型和水文分析等方法,识别并优化关键衔接廊道及节点,在中心城区行政区和建成区两个尺度构建研究区生态网络。结果表明:1)行政区生态源地分布整体呈现“南北相望”的格局,建成区生态源地集中在中部;2)研究区综合生态阻力高值主要集中在研究区中部,呈放射状向外扩散,综合生态阻力低值主要分布在研究区周边,以大型林地斑块为主;3)行政区极重要、重要、一般廊道数分别为15、21、69,极重要廊道集中分布在北部,建成区极重要、重要、一般廊道数分别为37、113、227条,极重要廊道主要分布在建成区中部;4)行政区和建成区一类生态节点分别为29、25个,二类生态节点33、17个。最终通过叠加行政区和建成区生态网络要素,形成贵阳市中心城区生态网络,研究结果能为贵阳市中心城区在未来用地空间上协调生态保护与城市发展提供科学合理的参考。

    Abstract:

    In the karst mountainous area, with the urban expansion, a large number of natural mountains have been embedded into the urban built-up area, forming the urban remnant natural mountains which have various ecosystem service functions. However, in the process of dense development within the urban area, these urban remnant mountains were often isolated and surrounded by the urban construction land, forming the ecological islands in the artificial interference field of urban built-up area. Construction of ecological network of the mountainous urban could be not only conducive to the protection of natural resources of urban remnant natural mountains, but also beneficial to enrich the service functions of urban green infrastructure ecosystem. Taking the downtown of Guiyang, a typical mountainous city in karst area, as research area, we comprehensively used morphologically spatial pattern analysis (MSPA) and landscape connectivity to identify ecological sources and determined the comprehensive resistance area based on the principal component analysis. We also identified and optimized the key connection corridors and nodes through the minimum cumulative resistance model (MCR), and constructed the ecological network at two scales of the administrative area and the built-up area of the research area. The results showed that: 1) the overall distribution of ecological sources in the administrative region presented a pattern of “north and south facing each other”, and the ecological sources in the built-up area were concentrated in the central part; 2) The high values of comprehensive ecological resistance were mainly concentrated in the middle of the study area and radially spread outwards, while the low values were mostly distributed in the periphery of the study area with large forest patches; 3) The number of essential, important and general corridors in the administrative region were 15, 21 and 69 respectively. The essential corridors were concentrated in the north of the study area, meanwhile, the number of essential, important and general corridors in the built-up area were 37, 113 and 227 respectively, and the essential corridors were mainly distributed in the middle of the built-up area; 4) There were 29 and 25 ecological nodes in the administrative and built-up areas, and 33 and 17 second-class ecological nodes, respectively. Finally, by superposition the ecological network elements of administrative region and built-up areas, the ecological network of the downtown of Guiyang City was constructed. This study could provide scientific and reasonable reference for coordinating ecological conservation and urban development in the central urban area of Guiyang city.

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范春苗,王志泰,汤娜,邓国平.基于形态学空间格局和空间主成分的贵阳市中心城区生态网络构建.生态学报,,(). http://dx. doi. org/10.5846/stxb202012213241

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