郑州市绿地景观破碎化对人为活动的时空响应

以郑州市为研究对象，选取1992、2000、2009、2017年夜间灯光数据及Landsat影像为数据源。结合ArcGIS、Fragstats和GeoDA软件，综合运用人类聚居指数(HSI)和景观格局指数(SPLIT/COHESION/PD/LSI)，利用双变量空间自相关探究人为活动强度与城市绿地景观破碎化的时空关联性。结果表明:1）1992-2017年人为活动高强度区域以郑州市主城区为中心向东北和东南方向呈放射状扩大；2）1992-2017年绿地斑块分割度指数从306.74下降到125.12、结合度指数从98.82上升到99.45、斑块密度从21.54下降到15.01、景观形态指数从499.26上升到534.90，绿地景观破碎化程度总体降低；3）1992-2017年郑州人类聚居指数（HSI）与绿地景观斑块分割度指数（SPLIT）的Moran’s I分别为0.50、0.63、0.76、0.82具有空间正相关性，与绿地景观结合度指数（COHESION）Moran’s I分别为-0.66、-0.63、-0.77、-0.80具有空间负相关性，在99.9%的置信度下的空间自相关是显著的。研究揭示了城市化背景下绿地景观破碎化对人为活动强度的响应关系，以期为城市发展和绿地规划及建设提供依据。

Spatiotemporal Responses of the Fragmentation of Green Space to the Human Activity Intensity in Zhengzhou City

Taking Zhengzhou city as the research area,night light data and Landsat images from 1992,2000,2009,and 2017 were used as basic data resources.Combined with software ArcGIS,Fragstats and GeoDA,human settlement index (HSI) and landscape pattern index (SPLIT/COHESION/PD/LSI) were adopted comprehensively to explore the spatiotemporal correlation between the human activity intensity and the fragmentation of green space by applying bivariate spatial autocorrelation method.The results showed that 1) from 1992 to 2017,the area of high-intensity human activities expanded radially to the northeast and southeast with the downtown as the center.2) From 1992 to 2017,the SPLIT of green space patches decreased from 306.74 to 125.12,the COHESION increased from 98.82 to 99.45,the PD decreased from 21.54 to 15.01,and the LSI increased from 499.26 to 534.90.3) From 1992 to 2017,the HSI had a positive spatial correlation with the SPLIT of green space,the values of Moran’s I were 0.50 (1992),0.63 (2000),0.76 (2009),and 0.82 (2017),respectively,and had negative spatial correlations with the COHESION of green space,the values of Moran’s I in the corresponding years mentioned above were -0.66,-0.63,-0.77,and -0.80.The spatial autocorrelation was significant under 99.9% confidence level.Research reveals the relationship between the fragmentation of green spaces and the intensity of human activities in the context of urbanization,with a view to providing a basis for urban development and green space planning and construction.