基于GIS技术的宁德市自然保护地空间格局分析及优化路径

Analysis of Spatial Patterns and Optimization Strategies for Natural Protected Areas in Ningde City Based on GIS Technology

  • 摘要: 为厘清宁德市自然保护地的交叉重叠、分布零散化等问题,揭示其空间分布特征。以宁德市4种类型、54个自然保护地为研究对象,采用统计分析、空间叠置法、核密度估计法、地理集中指数、莫兰指数等方法对空间分布格局及优化路径进行分析研究。结果表明:(1)宁德市自然保护地类型主要以自然保护区、森林公园为主,数量分别为32个、16个;(2)自然保护地交叉重叠总面积达15496.82 hm2,且其它类型保护地与自然保护区重叠的次数最多、面积最大;(3)宁德市保护空缺面积为323338.37 hm2;(4)按区域划分:寿宁县自然保护地分布最集中,地理集中指数最高(G值为38.1),柘荣县自然保护地的地理集中指数最低(G值为1.59),按类型划分:自然保护区的地理集中指数最高(G值为60.32),海洋公园的地理集中指数最低(G值为1.59);(5)宁德市自然保护地整体空间集聚程度一般(全局Moran’s I指数=0.0839,P<0.05),呈正相关聚集分布。

     

    Abstract: To clarify the issues of overlapping and fragmented distribution of natural protected areas in Ningde City and reveal their spatial distribution characteristics.In this paper, the four types of natural protected areas(54 in total)in Ningde City as the research object, employing statistical analysis, spatial overlay analysis, kernel density estimation, geographical concentration index and the Moran's I Index to investigate their spatial distribution patterns and optimization pathways.The results show that:(1)the main types of nature protected areas are predominantly nature reserves and forest parks, with respective counts of 32 and 16.(2)The overlapping area of natural protected areas in Ningde City is 15496.82 hm2,the overlapping types of protected areas are predominantly nature reserves.(3)The conservation gap area in Ningde City is 323338.37 hm2.(4)By region, Shouning County demonstrates the most concentrated distribution of protected areas(geographical concentration index G=38.1),while Zherong County has the lowest(G=1.59).By type, nature reserves show the highest geographical concentration(G=60.32),whereas ocean parks exhibit the lowest(G=1.59).(5)The overall spatial clustering degree of natural protected areas was moderate(Global Moran's I = 0.0839,P<0.05),exhibits a positive spatial auto-correlation with clustering.

     

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