黔中喀斯特城市遗存自然山体景观格局时空演变——以安顺市为例

城市遗存自然山体是山地城市中珍贵而脆弱的生态资源，对于维持城市生态系统稳定发挥着不可替代的作用，然而近年来高强度的城市建设对其产生严重的干扰和胁迫。以安顺市建成区为研究区域，在空间信息技术支持下，综合运用景观格局指数法和缓冲区分析法，分别从城市景观格局动态、城市遗存自然山体景观动态及城-山交互作用3个方面，对近10年快速城市化背景下，安顺市城市遗存自然山体景观格局时空演变进行定量化研究，旨在揭示其对城市扩张的响应规律。结果表明：1）城市整体景观破碎度递增，斑块丰富度密度递减，景观多样性、均匀度、优势度呈波动性变化；2）城市遗存自然山体斑块数量、类型面积、景观优势度递增，斑块形状趋于规则化，连通性递减，聚集度先减后增；3）城-山交互作用明显，主要表现为城市遗存自然山体因城市建设持续受损缩减及其吸引城市建设；4）城市遗存自然山体500 m缓冲区内平均城市建设用地占比及其平均城市人工园林绿地占比均与山体缓冲区距离呈显著负相关，且不同等级城市遗存自然山体斑块与缓冲区内城市建设用地相关程度表现为小型斑块 > 中型斑块 > 较大型斑块 > 大型斑块，与缓冲区内城市人工绿化相关程度表现为中型斑块最高、较大型斑块最低，城市遗存自然山体对城市建设及其人工绿化明显具有吸引作用。解析快速城市化背景下城市遗存自然山体景观动态变化规律及其与城市建设之间的交互作用关系，为城市遗存自然山体后续科学规划管理提供决策支持与理论依据，也可为今后进一步深入开展以其为研究对象的科研活动提供前期基础。

Spatial and temporal evolution of landscape pattern of urban natural remnant mountains in karst region of central Guizhou: a case study of Anshun City

Urban natural remnant mountains are precious and fragile ecological resources in mountainous city, which play an irreplaceable role in maintaining the stability of urban ecosystem. However, in recent years, the high-intensity of urban construction had caused serious interference and stress on them.In this study,we selected the built-up area of Anshun City as the research area, with the support of spatial information technology, landscape pattern index and buffer zone analysis method were comprehensive applied. The spatial and temporal evolution of landscape pattern of urban natural remnant mountains of Anshun City was quantitatively studied from three aspects of the urban landscape pattern dynamics, urban natural remnant mountains landscape dynamics, and the interaction between urban construction and urban natural remnant mountains, in order to reveal its response law to urban expansion under the background of rapid urbanization in recent 10 years. The results showed that 1) the fragmentation index of urban landscape increased, the patch richness density decreased, and the shannon''s density index, shannon''s evenness index and dominance index showed change of upper and lower volatility. 2) The number of patches, classl area, and landscape dominance index of the urban natural remnant mountains patches increased. The patch shape tended to be regular, connectivity index decreased, and the aggregation index decreased first and then increased. 3) In the process of rapid urbanization, the interaction between urban construction and urban natural remnant mountains was obvious, which mainly performed as the continuous damage and reduction of urban natural remnant mountains due to urban construction and its attraction to urban construction. 4)Within the 500 m buffer zone of urban natural remnant mountains, Average proportion of urban construction land and average proportion of urban artificial garden green space in buffer zone were significantly negatively correlated with the buffer distance of urban natural remnant mountains. The correlation degree between urban natural remnant mountains with the urban construction land in buffer zone showed as small patch > medium patch > relatively large patch > large patch. The correlation degree with the urban artificial greening in buffer zone showed as the highest for medium patch and the lowest for relatively large patch. The urban natural remnant mountains were obviously attractive to the urban construction and its artificial greening. Analysis on the dynamic change law of urban natural remnant mountains landscape and its interaction with urban construction under the background of rapid urbanization. It can not only provide decision support and theoretical basis for the follow-up scientific planning and management of urban natural remnant mountains, but also provide early basis for further research activities with it as the research object in the future.