漳浦县沿海防护林工程建设下的景观格局变化

Landscapes Changes Based on Coastal Protection Forest Building in Zhangpu County

以不同时期的遥感影像为数据源,对漳浦县沿海防护林工程建设下不同时期的土地利用景观格局进行了分析.结果表明：1988—2008年,斑块数目、斑块密度、最大斑块指数、边界密度和连通度增加,分离度、香农多样性指数、香农均匀度指数降低,说明景观破碎化程度提高、多样性减少.其中,沙地的斑块数目和斑块密度增大,最大斑块指数、边界密度和平均斑块面积减少;居民地和林地的各种景观指数中除了平均斑块面积外均有增加;耕地的斑块数目、斑块密度和边界密度增加,最大斑块指数和平均斑块面积减少,其主要原因是植树造林、退耕还林等措施导致沙地、耕地等面积减少.因此,沿海防护林工程的建设促进了漳浦县景观格局的优化,效益显著.

The land used landscapes of coastal protection forest construction at different times were analyzed in Zhangpu County based on different times remote images.The results showed that during 1988 to 2008,patch number,patch density,the largest patch index,edge density and inter-connection increased,while division,Shannon diversity index and Shannon evenness index decreased.This showed that landscape fragmentation increased and diversity decreased.The patch number and patch density of sandy increased while the largest patch index,edge density and the mean patch size decreased.Residential and wool land landscape index increased except mean patch size.The arable land patch number,patch density,edge density increased,the largest patch index and mean patch size decreased.The mainly reason was the sandy and arable land size decreased due to the plantation and conversion of cropland to forest.So the building of coastal protection forest promotes the landscape pattern optimize in Zhangpu County and the benefit is significant.