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丹东市土地利用景观格局研究

     

摘要

使用土地利用景观图形数据,依据其土地利用的景观特征指数,从斑块尺度、景观尺度上对丹东市的土地利用景观格局进行分析,并研究土地利用类型、结构以及所形成的景观格局对生态环境的影响。结果表明:(1)丹东市面积最大的是林地景观、也是分布最广并且连续性最强的一种基质景观,其面积比例为65.08%,斑块个数所占比例约为32.89%,平均斑块面积为4.56km2/个,斑块的分离度只是0.03,旱地面积比例也较大,为22.34%,水田、草地、水域、城乡用地比例不相上下,依次为:4.75%、2.00%、2.63%、2.85%。(2)丹东市中部、北部基本都是大片森林覆盖的,山脊则都以旱地为主,水田主要分布在南部沿海,滩涂、沼泽地景观相对较少。(3)与周围沿海地区数据比较,丹东市景观斑块类型的平均斑块的面积与生态环境指数间呈正相关,而景观破碎化指数与生态环境指数间呈明显负相关。%With the land use landscape graphic data and the land use landscape characteristic index, from the plaque scale and the landscape scale, this paper analyzes the land use landscape pattern of Dandong and studies the land use types, structure and the impact of on the landscape pattern on the ecological environ-ment. The results show that: (1) woodland landscape is the largest, widespread and continuous area of Dandong; the area proportion is 65.08%; the number of the patches is 32.89%; the average patch area is 4.56 km2/a; the plaque degree of separation is only 0.03;the dry land area ratio is 22.34%; the paddy field, grassland, water area, urban and rural land use ratio match and the data are 4.75%, 2.00%, 2.63%, and 2.85%. (2) the centre and north of Dandong is largely covered by the forest; the ridge is mostly the dry land; the paddy field is mainly distributed on the southern coast, beach; the wet and swamp landscape are relatively less. (3) with the correlated analysis, this paper shows that the average area of the landscape patch type is positively related to the ecological environment and the index of the landscape fragmentation is negatively related to the ecological environment.

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