普兰店市土地利用景观格局及其生态环境效应研究

Landscape Pattern and Ecological Environment Effect in Pulandian City

基于研究区2010年的土地利用图形数据,选用生态意义较明确的景观特征指数,定量分析了普兰店市景观空间格局及其生态环境效应。结果表明:(1)普兰店市旱地景观面积最大、分布最广,其面积比例为47.1%,林地景观的面积比例也较大,草地和沼泽地的面积比例较小。平均斑块面积0.82 km2/个,景观多样性指数为1.35,优势度指数为0.73,均匀度指数为0.62;(2)大部分旱地景观分布在普兰店市南部,林地景观大多分布在北方。城乡用地、水田则相对集中分布在南部沿海地区;(3)普兰店市的生态环境指数为0.40,生态环境质量总体一般。

Based on the graphic data of land use in 2010, this study selects landscape metrics, an index with explicit ecologi- cal indications, to analyze the landscape spatial pattern of Pulandian City quantitatively and to the impacts of landscape pattern on regional eco - environment. The result shows ： （ 1 ） Dry land has the most extensive in distribution, accounting for 47.1% of the to- tal area. The forest areal is also very large, but the area proportion of grassland and wetland is small. Average patch area is 0. 82 km2. The landscape diversity index is 1.35, the dominance index is 0. 73, evenness index is 0. 62. （2） Most of the dry land is in the south of Pulandian, and woodland is mostly in the north. Paddy field, town and country land are in the south parts in concen- trative distribution. （3） Eco - environment index in Pulandian is 0.40, the overall eco - environment condition is average.