向海湿地景观格局变化及其原因分析

Landscape Change Of The Xianghai Wetland And Its Cause

以5km为环间距,将向海湿地分割为5个同心圆。选用1980年和2000年遥感影像为基本信息源,在ARC/INFO、ERDAS8.5和FRAGSTATS3.3软件的支持下,对景观指数:斑块密度、平均斑块面积、景观多样性指数和分维数进行分析。结果表明,自20世纪80年以来,向海湿地面积萎缩、斑块破碎化。人类活动强度和自然因子变化幅度的分析表明,湿地变化是人为因子和自然因子共振迭加的结果。要保护湿地,必须控制人类对向海湿地的干扰。

The Xianghai wetland was divided into five concentric circles, in which the distance between any two circles was 5 km. Remote sensing data from 1980 and 2000 was Used, with the support of ARC/INFO, ERDAS 8.5 and FRAGSTATS 3.3 sofiwares in this study. The landscape indices including patch density, mean patch areas, diversity and fragmentation were calculated. The results showed that the Xianghai wetland areas have shrunk and patches have fragmented since 1980; and indicated that human activities and natural factors impacted on the wetland together. It is necessary to control human disturbance in order to protect the Xianghai wetland.