关键词: 生态系统服务功能, 湿地, 景观格局, 响应, 南四湖

Abstract: Changes in landscape pattern of the Nansi Lake wetland were monitored with the fifth round of satellite remote-sensing images (1987 – 2010). Response of the ecosystem of the wetland in service value to the changes were analyzed, using the market comparison approach, shadow project approach, industrial oxygen generation cost method, carbon tax method and value substitution method. Results show that large tracts of reed- and lotus-dominated natural wetlands had been converted into artificial wetlands, such as aquacultural farms, paddy fields, etc., thus promoting the enhancingement of  landscape fragmentation. Impacts of the changes on supply function, regulataory function, cultural function and support function were quite obvious, especially on supply function and regulatory function. Calculation based on the constant prices of 2010 shows that the changes caused decreases in service value of the ecosystem, which included the decrease of in atmospheric element regulation function by 1 170 million yuan(RMB), the purification function by 377 million yuan, and the   water conservation function by 65 million yuan.While the changes did increase materials and food product function of the ecosystem by 1306 million yuan. Ultimately, a decrease of 306 million yuan were caused by the changes from 1987 to 2010. Responses of the ecosystem in other functions, including mitigation of flood, conservation of soil, habitats, biodiversity, entertainment, culture and science ,functions, etc. were not so obvious.

Key words: ecosystem service value, wetland, landscape pattern, response, the Nansi Lake