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基于2005年兰州市南北两山环境绿化工程区的卫星遥感资料,应用生态系统服务评价方法,结合研究区实际情况,对研究区的城市人工森林生态系统服务价值进行评估。结果表明:①2005年研究区的人工森林生态系统总服务价值为15.59亿元.a-1;各项服务价值的顺序依次为:森林游憩>维持大气平衡>涵养水源>林副产品>固土保肥>保护生物多样性>木材>薪炭材;②城市人工森林生态系统服务价值组成上表现为经济效益(直接价值)与生态效益(间接价值)的比例相差不大,明显有异于自然生态系统,这主要是由人工生态系统的人为性和明确的目的性造成的。研究表明,城市人工生态系统对CO2减排的可持续性和生态安全具有现实意义。对积极探索西部地区的生物减排及水土资源及生态安全问题,对进行城市人工生态系统服务评价具有一定的借鉴意义。
Based on the satellite remote sensing data of Lanzhou North and South Mountains Environmental Greening Project Area in 2005, the ecosystem service evaluation method was applied to evaluate the service value of urban artificial forest ecosystem in the study area based on the actual situation of the research area. The results showed that: ① The total service value of artificial forest ecosystem in the study area was 1.559 billion yuan in 2005. a-1; The order of the service values was as follows: forest recreation> maintaining the atmospheric balance> water conservation> forest by-products > Conservation of biodiversity> timber> firewood; ② The composition of urban artificial forest ecosystem services shows that the ratio of economic benefits (direct value) to ecological benefits (indirect value) is not significantly different from those of natural ecosystems, This is mainly caused by the human nature and the definite purpose of the artificial ecosystem. Research shows that the urban artificial ecosystem is of practical significance to the sustainability of CO2 emission reduction and ecological security. To actively explore the issue of biological emission reduction, water and soil resources and ecological security in the western region, it is of great significance to evaluate urban artificial ecosystem services.