东兴市海岸带景观格局变化分析

根据东兴市1989年、1999年和2009年的森林资源调查资料和TM遥感影像资料,利用RS技术、GIS技术和fragstas景观分析软件,通过景观指数分析法和面积转移矩阵方法研究东兴市海岸带近20年景观格局变化情况。结果表明,20年间东兴市海岸带景观格局发生明显变化:(1)陆域面积呈上升趋势,湿地面积呈下降趋势,渔业湿地在1999年至2009年间迅速增长,10年间共增长了2276.73hm2;(2)无立木林地与乔木林地之间面积转变最大,大量渔业湿地主要由水田转变而成;(3)整体景观在20年间破碎程度加剧,形状趋于规整,多样性、均匀度和蔓延度都呈现出先增后减的波动。

Analysis on Coastal Landscape Pattern Changes in Dongxing

Based on the forest resource investigation material and TM remote sensing image with the support of RS,GIS technology and fragstas, a landscape analyze software, the dynamic change of the landscape pattern in Dongxing coastal area over the past 20 years is studied using landscape indices analysis and area transfer matrix method in this research. The result indicates that there is an obvious change in the landscape pattern of Dongxing coastal area over the past 20 years.(1) The dry land area presented an ascending trend; the wetland area presented a descending trend; the area of fishing wetland increased rapidly in 1999 to 2009, with a total increase of 2276hm² in just 10 years. (2) The area transition happened mostly between non-forest land and high-forest land. A large number of fishing wetland was mainly transferred from paddy field. (3) The fragmentation degree of the overall landscape was gradually intensified in the past 20 years. The shape of the overall landscape tends to be neater, and the diversity, evenness and spread degree presented a fluctuation with an initial increase followed by a later decline.