基于Fragstats软件和TM影像的海南天然草地景观格局分析

摘要

In order to study landscape pattern of Hainan natural meadow, the interpretation has been conducted on TM of natural meadow by using ArcGIS 9. 3 and the vector data of natural meadow types in the test site have been obtained, which have been transformed into raster data in Art-View 3.3. Nine indexes have been selected for calculation based on Fragstats 3.3 and Excel 2007, including largest patch index, average patch area, edge density, shape index,Shannon' 8 diversity index,Shannon' 8 evenness index, fragmentation index, dominance index and separation index. The results show that landscape patch shape of natural meadow is simple, fragmentation index and landscape diversity are high and landscape indexes are highly correlated.%为研究海南天然草地景观格局,利用ArcGIS 9.3软件对试验区天然草地TM影像进行解译,得到试验区天然草地类型矢量数据,在ArcView 3.3软件环境下将数量数据转换为栅格数据.选择最大斑块指数、斑块平均面积指数、边缘密度、形状指数、香农多样性指数、香农均匀度指数、破碎度指数、优势度指数、分离度指数9项景观格局指数,在Fragstats 3.3和Excle 2007软件环境下进行计算并分析,结果表明:天然草地景观图斑形状较为简单、破碎化程度较高,景观多样性较为丰富,景观指数间表现出较高的相关性.