Abstract: The integrate valuation of ecosystem services and tradeoffs (InVEST) model was used to calculate three ecosystem services respectively, such as the carbon storage, water supply and soil conservation of ecological conservation redline of Chongqing from 2015 to 2018. The results show that: ①The carbon storage in ecological conservation redline area of Chongqing is increased from 2015 to 2018, which is slightly from 6.8×107 t in 2015 to 7.1×107 t in 2018, with a change rate of 3.54%. ②The water supply is decreased slightly from 2015 to 2018, which is from 2.8×1010 mm in 2015 to 2.6×1010 mm in 2018, with a change rate of -7.70%. ③The soil conservation is decreased from 2015 to 2018, which is rapidly from 9.7×1010 t in 2015 to 7.8×1010 t in 2018, with a change rate of -19.74%. ④The comprehensive ecosystem service function of the study area is reduced. The comprehensive evaluation score of ecosystem service of ecological conservation redline in 2015 is 6.02 and that in 2018 is 5.57.

Key words: resources environment engineering; InVEST model; ecosystem services; ecological conservation redline; land use change

摘要： 采用生态系统服务评估与权衡(InVEST)模型分别计算2015年和2018年重庆市生态保护红线区域的固碳功能、水源供给功能、土壤保持功能这3大生态系统服务。研究结果表明：①2015—2018年重庆市生态保护红线区域碳储存量增加，2015年的碳储存量为6.8×107 t，2018年碳储存量上升至7.1×107 t，变化率为+3.54%；②2015—2018年期间水源供给量略有降低，从2015年的2.8×1010 mm下降至2018年的2.6×1010 mm，变化率为-7.70%；③2015—2018年土壤保持量减少，从2015年的9.7×1010 t降低到2018年的7.8×1010 t，变化率高达-19.74%；④研究区域的综合生态系统服务功能降低，2015年生态保护红线生态系统服务综合评估得分为6.02分，2018年得分为5.57分。

关键词: 资源环境工程；InVEST模型；生态系统服务；生态保护红线；土地利用变化