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中文摘要：
参考COSTANZA以及谢高地等提出的生态系统服务价值系数，制定了符合城市生态系统的服务价值系数。基于重庆市主城区1993、2000和2004年3期土地利用／覆被（LUCC）变化数据，对重庆市主城区的生态系统服务价值进行了估算。结果表明：重庆自1997年成为直辖市后，耕地、林地大量向城市建设用地转化，城市生态系统服务价值急剧降低。1993年重庆市主城区生态系统总服务价值为564．75×10^6元，2004年为387．71×10^6元，下降了31．3％。生态服务价值系数的变化对重庆城市生态系统总服务价值的影响缺乏弹性。水域和林地面积变化对重庆市主城区生态系统总服务价值影响明显。
英文摘要：
By referring to the ecosystem service value coefficients proposed by COSTANZA and XIE Gao-di, an ecosystem service value coefficient was developed which is applicable to urban ecosystems. And based on the land use change/cover （ LUCC ） data of Chongqing proper in the year of 1993, 2000, and 2004, ecosystem service value of the city was calculated. Results show that since 1997 when Chongqing became a municipality directly under the Central Government, large areas of farmland and forest land were alienated for urban construction, causing fall in its urban ecosystem service value by 31.3% , from 564.75 million yuan in 1993 to 387.71 million yuan in 2004. The effect of the changes in the ecosystem service value coefficient on the total urban ecosystem service value of Chongqing is not flexible enough. The impact of the change in water surface and woodland area on the total urban ecosystem service value of Chongqing is significant
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