1980-2010年鄱阳湖地区土地覆盖与景观格局变化

以1980、2005和2010年鄱阳湖地区的土地覆盖数据为基础，采用GIS、RS及景观生态学的方法，分析1980-2010年该区土地覆盖及景观格局变化情况，并定量分析了土地覆盖类型变化度、斑块面积指数、斑块形状指数、边缘密度指数以及多样性指数等指标.结果表明：1980-2010年，研究区水田、内陆水体、常绿阔叶林和城镇建设用地不仅是该区域的主要土地覆盖类型，而且变化最强烈.总体上，内陆水体、城镇建设用地面积显著增加，水田和旱地面积有所减少.从景观格局变化来看，虽然鄱阳湖地区受到人口增长和经济发展的影响，其景观破碎度变化和景观多样性指数略呈下降趋势，但变化并不大，这反映出前期环境管理对于区域环境保护已经发挥重要作用，但仍然面临长期挑战.

Land cover and landscape pattern changes in Poyang Lake region of China in 1980-2010.

Based on the land cover datasets of Poyang Lake region in 1980, 2005, and 2010, and by using GIS, RS, and landscape ecology approaches, this paper studied the land cover and landscape pattern changes in this region from 1980 to 2010, and quantitatively analyzed the land cover types change degree, patch area index, patch shape index, margin density index, and landscape diversity index. In 1980-2010, the main land cover types in this region were paddy field, inland water, evergreen broadleaf forest, and urban built up area, and their areas and spatial patterns varied dramatically. Overall, the areas of inland water and urban built up area had a significant increase, while those of paddy field and dry farmland decreased somewhat. Due to the effects of population growth and economic development, the landscape fragmentation degree and landscape diversity index presented a decreasing trend, but the decrement was small, which implied that the previous environmental management of this region had exerted important roles, but a long term challenge was still faced with between the regional environmental protection and sustainable development.