陕西省生态环境景观格局脆弱性及空间关联研究

基于地理信息系统GIS和景观格局指数分析Fragstats,研究陕西省生态环境景观格局脆弱性及空间关联,结果显示:2001年、2006年和2011年,陕西省景观格局脆弱度分别为0~7.406 6、0~7.970 5和0~8.034 8,呈下降的趋势,高脆弱区面积逐渐减小,低脆弱区和较低脆弱区面积逐渐增大.2001年、2006年和2011年的全局Moran`s I 指数分别是0.792 8、0.692 1和0.679 9,呈不断减少的趋势,景观格局脆弱度存在较强的正相关现象.局部空间自相关表明,2001年"高-高"值的区域主要分布在陕西中部和南部,2006年"高-高"值的区域分布在除中南部以外的区域,2011年"高-高"值的区域分布在除中西部以外的区域.

Study on Landscape Pattern Vulnerability of Ecological Environment and Spatial Correlation in Shanxi Province

This paper analyze landscape pattern vulnerability of ecological environment and spatial correlation in Shaanxi Province by using Geographic Information System (GIS) and landscape pattern index calculation (Fragstats).The results indicated that,the landscape pattern vulnerability were 0~7.406 6,0~7.970 5 and 0~8.034 8 in Shaanxi Province in 2001,2006 and 2011,respectively,showed a downward trend,high vulnerable area decreases gradually,low vulnerable region and lower vulnerable area gradually increased.The global Moran's I index in 2001,2006 and 2011 was 0.792 8,0.692 1 and 0.679 9,respectively,showed a decreasing trend,and there was a strong positive correlation between the landscape fragility.The local autocorrelation showed that the region of "high-high" in 2001 was mainly distributed in the middle and south of Shaanxi Province.In contrast,the area of "high-high" in 2006 was distributed in regions other than the central and southern.The region of "high-high" in 2011 was distributed in regions other than the Midwest.