By using GIS, RS and landscape ecology, LandsatTM (1993 and 2009) and ETM (2001) remote sensing images of Licheng District of Ji’nan City, Shandong Province were interpreted, and dynamic changes of landscape pattern ...By using GIS, RS and landscape ecology, LandsatTM (1993 and 2009) and ETM (2001) remote sensing images of Licheng District of Ji’nan City, Shandong Province were interpreted, and dynamic changes of landscape pattern in the district were analyzed at the levels of class and landscape. The results showed that during the 16 years the landscape pattern in the district had changed significantly. (a) From the perspective of patch category, areas of arable land, woodland and grassland decreased unceasingly, and arable land accounted for the largest reduction from 488.15 km 2 in 1993 down to 324.37 km 2 in 2009, witnessing a reduction rate of 33.56%. But the patch quantity and fragmentation increased, patch connectivity reduced. Spatial pattern of construction land expanded and its area witnessed a significant increase of 147.05%. Patch cohesion index increased and connectivity grew better. (b) From the perspective of overall landscape, patch quantity, contagion and perimeter-area fractal dimension decreased, patch shape became simple, the Shannon’s diversity index, Shannon’s evenness index and splitting index increased, landscape heterogeneity rose. With the rapid social and economic development, landscape pattern will be more and more influenced by human behaviors展开更多
选取乌鲁木齐市中心城区(天山区、沙依巴克区、水磨沟区、高新区)为研究靶区,以2008、2013、2017年的Landsat遥感影像为数据源,运用Envi、ArcGIS以及Fragstats景观格局分析软件,对2008—2017年研究区生态类型格局面积变化及转移矩阵进...选取乌鲁木齐市中心城区(天山区、沙依巴克区、水磨沟区、高新区)为研究靶区,以2008、2013、2017年的Landsat遥感影像为数据源,运用Envi、ArcGIS以及Fragstats景观格局分析软件,对2008—2017年研究区生态类型格局面积变化及转移矩阵进行分析,并选取7个景观特征指标,即绿地斑块面积、斑块个数、斑块密度、平均斑块面积、斑块形状指数、斑块类型占景观面积比例、斑块聚集度,进行了定性与定量分析。结果表明:城市绿地景观转入量主要来自裸地及农田,绿地面积从2008年的90.38 km 2增加至113.34 km^2,2017年绿地面积相较2013年增加了22.96 km^2,面积所占比例增加了2百分点。研究区绿地景观破碎化程度总体呈上升趋势,其中高新区绿地面积较小,斑块个数最多,斑块密度最大,破碎化程度最高,绿地生态功能较弱。绿地斑块形状及绿地景观结构的复杂性总体呈现增加的趋势,城市绿地景观受人类活动影响明显,其中因水磨沟区部分山区绿地景观连通性较强、破碎度小,城市绿地聚集度最大。针对这些问题提出绿地优化建议,为研究区城市绿地景观优化及生态环境的改善提供参考,同时为乌鲁木齐市创建“国家生态园林城市”这一目标提供一定理论依据与决策支持。展开更多
文摘By using GIS, RS and landscape ecology, LandsatTM (1993 and 2009) and ETM (2001) remote sensing images of Licheng District of Ji’nan City, Shandong Province were interpreted, and dynamic changes of landscape pattern in the district were analyzed at the levels of class and landscape. The results showed that during the 16 years the landscape pattern in the district had changed significantly. (a) From the perspective of patch category, areas of arable land, woodland and grassland decreased unceasingly, and arable land accounted for the largest reduction from 488.15 km 2 in 1993 down to 324.37 km 2 in 2009, witnessing a reduction rate of 33.56%. But the patch quantity and fragmentation increased, patch connectivity reduced. Spatial pattern of construction land expanded and its area witnessed a significant increase of 147.05%. Patch cohesion index increased and connectivity grew better. (b) From the perspective of overall landscape, patch quantity, contagion and perimeter-area fractal dimension decreased, patch shape became simple, the Shannon’s diversity index, Shannon’s evenness index and splitting index increased, landscape heterogeneity rose. With the rapid social and economic development, landscape pattern will be more and more influenced by human behaviors
文摘选取乌鲁木齐市中心城区(天山区、沙依巴克区、水磨沟区、高新区)为研究靶区,以2008、2013、2017年的Landsat遥感影像为数据源,运用Envi、ArcGIS以及Fragstats景观格局分析软件,对2008—2017年研究区生态类型格局面积变化及转移矩阵进行分析,并选取7个景观特征指标,即绿地斑块面积、斑块个数、斑块密度、平均斑块面积、斑块形状指数、斑块类型占景观面积比例、斑块聚集度,进行了定性与定量分析。结果表明:城市绿地景观转入量主要来自裸地及农田,绿地面积从2008年的90.38 km 2增加至113.34 km^2,2017年绿地面积相较2013年增加了22.96 km^2,面积所占比例增加了2百分点。研究区绿地景观破碎化程度总体呈上升趋势,其中高新区绿地面积较小,斑块个数最多,斑块密度最大,破碎化程度最高,绿地生态功能较弱。绿地斑块形状及绿地景观结构的复杂性总体呈现增加的趋势,城市绿地景观受人类活动影响明显,其中因水磨沟区部分山区绿地景观连通性较强、破碎度小,城市绿地聚集度最大。针对这些问题提出绿地优化建议,为研究区城市绿地景观优化及生态环境的改善提供参考,同时为乌鲁木齐市创建“国家生态园林城市”这一目标提供一定理论依据与决策支持。
