【摘要】 鄂西北地区位于湖北省西北部,是我国自然地理南北过渡的重要地区,亦是我国南水北调中线工程的重要水源区,生态环境保护意义重大。在鄂西北地区六期遥感数据基础上,利用地理信息技术和空间统计的方法,研究了该区域土地利用格局的时空变化,对不同用地类型所提供的生态系统服务价值进行评估,分析了生态系统服务价值与土地利用格局的驱动因素和相关性,计算了社会经济因素与生态系统服务价值的空间相关性。研究结果表明:(1)1990—2015年鄂西北主要土地利用类型的变化幅度较小,土地综合动态度为0.06%,土地类型斑块破碎化程度增加,斑块形状趋于复杂。(2)研究区间鄂西北生态服务价值处于上升趋势,生态系统服务价值与景观格局的时空变化具有相关性,其中与多样性指数呈正相关性,与蔓延度指数呈负相关性。(3)人均国内生产总值、人口密度和城镇化率是生态系统价值变化的主要驱动因素,与生态服务价值的局部空间相关性主要集中南部区域。研究结果为鄂西北生态环境可持续发展、合理开发土地资源提供理论依据。更多还原

【Abstract】 Exibei, located in the northwestern Hubei Province, is recognized as an important region for the geographical transition from north to south. It is also an important water source area of the Central Line Project of South-to-North Water Diversion in China. Above all, conducting the ecological environment protection in the region is necessary. Combing with geographic information technology and spatial statistical methods, this research focused on the temporal and spatial changes of land use pattern in Exibei region based on remote sensing maps from 1990 to 2015. Also, ecosystem service value supported by different land types was evaluated, and the driving factors and correlation of ecosystem service value and land use patterns were analyzed. The spatial relevance of socio-economic factors and ecosystems service value were calculated. The results showed that:(1) Between1990 and 2015, the comprehensive dynamic degree in the study area was 0.06%, indicating that the total land use landscape in the study area changed little. The fragmentation of land use type in the study area increased, the shape of landscape patches tended to be complex.(2) The ecosystem service value in the study area showed an increasing trend. It was related to the spatial-temporal variability of landscape pattern, which was positive with landscape diversity index(SHDI), but negative with contagion index(CONTAG).(3) Per capita GDP, population density and urbanization rate were the main driving factors that decreased regional ecosystem services value, and the local spatial correlation of ecosystem service value was mainly concentrated in the south of study area. The results can provide a theoretical basis for the sustainable development of ecological environment in Exibei region and the rational use of land resources.更多还原