吉林东部山区坡度等级上景观格局分异研究--以通化市为例

Landscape Heterogeneity Analysis on Gradient Scale of Mountainous Area in Eastern Jilin Province——A Case Study of Tonghua City

本文以通化市为例,应用30m分辨率的DEM,对坡度等级信息进行提取,结合通化地区的景观类型数据,应用Arc/Info软件分析景观类型在不同坡度等级上的分布特征,然后应用Fragstats景观分析软件,选取不同的景观格局指数,定量分析通化地区的景观格局坡度等级上的分异规律。并重点研究了林地与耕地在坡度等级上的分布。结果表明:林地是通化地区主要的景观类型,主要分布在斜坡区域;其他的景观分布在坡度相对较低的区域。结果表明:景观格局的分布与坡度和人类活动有着密切的关系:在坡度较低的区域,由于人类活动的影响,景观类型丰富,结构复杂,景观破碎化程度高;而坡度较高的区域,景观类型单一,结构简单,景观破碎化程度低。其中在5°-15°的坡度等级上是各种景观的集中分布区域,景观格局复杂,是人类活动主要的分布区域。

We used DEM with resolution of 30m to extracted gradient scale of Tonghua city. Combined with landscape data of Tonghua city, we quantitative analyzed the gradient scale distribution rules of Tonghuo city using Arc/Info and Fragstats software. The results showed that the forest was the main landscape type in Tonghua city, and it existed in the region where the gradient was high; Other landscape types existed in the region where the grandient was low. The distribution of landscape had close relationship with gradient and human activity. In the region where the gradient was low, with the influence of human activity, the types of landscape are rich, the structures are complex and highly fragmented; in the region where the gradient is high, the types of landscape are singleness, the structures are simple, and lowly fragmented. The region with gradient scale of 5°- 15°, the landscapes concentrated, landscape pattem complex and high human activity.