若尔盖高寒湿地景观格局变化分析

Analysis of Landscape Pattern Changes of Alpine Wetland in Zoigê

本文以1990年、2000年和2009年三期TM卫星遥感数据为主要数据源,利用3S技术对若尔盖高寒湿地景观格局特征进行了动态分析,探寻了近20年来若尔盖县湿地变化规律。结果表明:近20年来,若尔盖高寒湿地景观斑块数总体减少,湿地景观面积呈不断萎缩的态势,湿地景观多样性呈均衡化发展,各斑块类型面积差异较大,分布不均匀,景观格局趋于破碎化。因此,应进一步加强若尔盖湿地的保护,控制景观格局变化,科学合理地利用湿地资源。

In this paper, the TM images of 1990,2000 and 2009 were used as the main datasources,and analysis was made of the dynamic characteristics of the landscape pattern of wetland in Ruoergai by means of using 3S technique,aiming to explore the wetland change law in Zoige County for the recent 20 yeas. The results showed that in the recent 20 years, the Zoige wetland landscape patch number decreased generally, the wetland landscape area displayed a shrinking trend,the wetland landscape diversity was a balanced development, and various types of patch area had a big difference, exhibitina uneven distribution and landscape fragmentation. Therefore, the protection of Zoige wetland should be further strengthened for the purpose of controlling the wetland landscape pattern change and scientific and rational use of resources.