三江源区玉树囊谦县生态环境变化研究

The Changes of Ecological Environment in Nangqian County,Yushu Prefecture

随着全球气候变化和人类活动干扰加剧，流域生态环境遭到破坏，导致经济发展和生态保护之间的不平衡。青海省扎曲流域，具有国家级的生态地位优势，直接关乎澜沧江中下游地区的生态安危、生产发展、社会经济实力及人们的生活质量。扎曲流经玉树州囊谦县，以囊谦县为研究区，运用遥感手段，对研究区2001～2011年的植被指数（NDV／）和植被净第一性生产力（NPP）的变化情况进行了研究结果表明，研究区内陆地植被生态系统11年（2001～2011年）来保持着持续的稳定状态，但是这种稳定却容易受到土地利用类型的改变而发生剧烈的变动。

With glohal climate change and increased human disturbance, destruction of the basin ecological environment, resulting imbalance between economic development and ecological protection. Zhaqu basin in Qinghai Province has the status of a national ecological advantage, dircclly related to the ecological safety of the Lancang River region, produc.tion development, socio-economic strength and pcople＇s quality of life. Zhaqa is throngh Nangqian County, Yushu Prefecture. Taking Nangqian as the study area, using remote sensing method, the changes of vcgctation index （NDVI） and vegetation net primary productivity （NPP） in the study area from 2001 to 2011 were studied. The resuhs showed that terrestrial ecosystems within the study area for 11 years （2001 to 2011 ） maintained a continuous steady state, but this stahility was vulner- able to change in land use type＇ s dramatic changes.