浏阳市自然保护地整合优化前后土地利用及景观格局变化分析

Analysis of Land Use and Landscape Pattern Changes before and after Integration and Optimization of Nature Protected Areas in Liuyang City

以浏阳市自然保护地整合优化成果和国土三调成果数据为基础,采用景观格局指数分析法,分析研究区自然保护地整合优化前后土地利用及景观格局变化特征。结果表明,整合优化后自然保护地内土地利用类型组成变化显著,林地面积增幅最大,其他土地利用类型面积均减少,其中耕地和建设用地面积减幅较大。景观尺度水平下景观的破碎化程度、形状及边界复杂度、异质性和类型丰富度均降低,其聚集度、优势度及连通性增强。斑块类型水平下林地、水域、草地及园地的破碎化程度减轻;除林地的景观形状更加复杂外,其他景观的形状、边界复杂程度均降低;林地、水域、草地和建设用地的聚集度和连通性增强,耕地的优势度和连通性降低,园地的连通性增强、聚集度下降。

Based on the results of the integration and optimization of natural protected areas and the data of the third national land survey in Liuyang City,the landscape pattern index analysis method was used to analyze the changes of land use and landscape pattern before and after the integration and optimization of natural protected areas in the study area.The results showed that after the integration and optimization,the composition of the land use type in the nature protected areas changed significantly.The forest land area increased the most,and the area of other land use types decreased,among which the area of cultivated land and construction land decreased greatly.At the landscape scale level,the fragmentation degree,shape,boundary complexity,heterogeneity and type richness of the landscape reduced.The aggregation,dominance and connectivity of the landscape enhanced.At the patch class level,the fragmentation degree of woodland,water area,grassland and garden land reduced.Except for the more complex landscape shape of forest land,the complexity of other landscape shapes and boundaries reduced.The aggregation and connectivity of woodland,water area,grassland and construction land enhanced.The dominance degree and connectivity of cultivated land decreased.The connectivity of garden land increased,and the aggregation degree decreased.