云南省西双版纳地区生态系统服务价值的动态评估

Dynamic evaluation on ecosystem service values of Xishuangbanna,Yunnan,China

西双版纳地区作为生物多样性保护的热点区域,近年来该地区生态系统受到了严重的干扰和破坏。根据2001年、2005年、2009年的Landsat7 ETM影像的分类结果,并结合此3年的MODIS17A3的NPP产品数据和西双版纳州社会经济发展数据,对西双版纳地区生态系统价值进行评估,试图了解该地区生态系统服务的变化和特点,为该地区的生态系统管理等提供科学依据。结果表明:2001年、2005年和2009年西双版纳州生态系统功能价值分别为1 221.44、1 100.64和1 066.32亿元;涵养水源功能价值和生物多样性价值在降低,供给服务和美学与旅游的价值在增加;有林地的生态系统服务价值在逐年降低,而橡胶林和农用地的生态系统服务价值逐年增加;西双版纳生态系统价值总体呈现明显下降趋势。土地利用/覆盖变化是导致这种趋势的主要原因,限制有林地的开发是维持生态系统价值的关键。

Xishuangbanna ecosystem located in the tropical area of Yunnan Province,Southwestern China,which is one of hot spot areas of biodiversity conservation,has been recently suffering from a serious disturbance and damage.According to the land use existing state derived from Landsat7 ETM image data taken in 2001,2005 and 2009,combining the MODIS17A3 data in the three years and the local social and economic development data,the ecosystem service values（ESV） of Xishuangbanna were evaluated,in the hope of studying the changes and characteristics of ecosystem service values of the area to provide a scientific basis for the area＇s ecosystem management.The results show that the ESVs of Xishuangbanna in 2001,2005 and 2009 were 122.144 billion Yuan,110.064 billion Yuan and 106.632 billion Yuan respectively.The proportion of the ESV of water conservation function and biodiversity conservation was decreasing,while the ratio of ESV of goods supply,aesthetics and tourism were yearly increased.The ratio of forest ecosystem services value was reduced year by year,while the ESV of rubber plantations and agricultures was increasing.The ESV in Xishuangbanna region presented a clear downward tendency.Land use / cover change was a main driving force of this decrement.Conserving forests is crucial for maintaining the ESV in Xishuangbanna.