苏南水网大龙荡片区景观格局演变及特征

Evolution and Characteristics of Landscape Pattern in Dalongdang Area of South Jiangsu Water Network

研究景观格局的演变情况有助于土地资源的合理利用,促进地区可持续发展。文章借助地理信息系统,利用景观指数分析方法,对大龙荡片区2005—2018年景观格局的演变进行分析比较,探究苏南水网乡村景观格局演变规律。结果表明,研究区2005—2018年景观复杂程度逐渐降低,景观连通性下降,景观多样性上升,整体景观格局向着均衡化发展。具体表现为:自然景观面积比重逐年下降,其他建设用地面积比重持续上升;耕地、河渠、水库坑塘等农用地斑块类型破碎化程度加深,斑块类型复杂程度加大;住宅用地和其他建设用地等人工建设用地斑块类型破碎化程度有所减弱,斑块类型复杂程度下降。

The study of the change in landscape pattern will be conducive to the reasonable use of land resources and sustainable regional development. The paper analyzes and compares the evolution of landscape pattern in Dalongdang area in 2005-2018 using landscape index analysis method under the help of GIS to explore the landscape pattern evolution of the villages located within southern Jiangsu water network. The results show that the landscape has been less complicated, with the declining landscape connectivity, increased landscape diversity and equilibrium development of landscape pattern in whole. Specifically, the area proportion of natural landscape decreases year by year, while the area proportion of other construction land continues to increase;the agricultural land patches such as arable land, rivers, drains, reservoir and ponds has been more fragmented, with increased complexity of patch types, while artificial construction land patches such as residential land see less fragmentation, with decreased complexity of patch types decreases.