1995—2015年关中平原城市群生态系统服务价值（ESV）及其时空差异

为探究关中平原城市群土地利用程度对生态系统服务价值（ecosystem service value，ESV）的影响及变化情况，基于1995—2015年研究区5期土地利用数据，利用当量因子评估法、热点分析法和敏感性指数法对关中平原城市群ESV进行了评估，并分析了其时空规律。结果表明，20 a来，关中平原城市群ESV总体下降49.59亿元；在生态系统服务类型中，调节服务作用突出，其中水文调节占主导地位；ESV 冷点和热点分布具有明显的区域特征，主城区主要为ESV 冷点集群区，而秦巴山地、山西省东部林地及黄河、渭河等主要河流周边是ESV 热点集群区； 林地、水域和耕地对区域内ESV变化影响较大。获得的研究区ESV宏观变化规律，可为今后关中平原城市群生态环境保护、补偿和城镇发展规划的编制提供理论支撑。

Ecosystem service value (ESV) and spatial-temporal difference of urban agglomeration in Guanzhong plain from 1995 to 2015

In order to explore the impact of land use degree on ecosystem service value (ESV) and its change due to Guanzhong plain urban agglomeration,ESV assessment and spatial-temporal analysis of Guanzhong plain urban agglomeration are conducted by equivalent factor method, hot spot analysis method and sensitivity index method, based on land use data of five periods from 1995 to 2015. The results show that the ESV in Guanzhong plain urban agglomeration area has dropped by 4.959 billion yuan in the past 20 years; among the types of ecosystem services, regulation services play a prominent role,in particular hydrological regulation plays a dominant role; the distribution of cold spots and hot spots of ESV has obvious regional characteristics. The main urban area of the city is mainly the ESV cold point cluster area, while Qinba mountain area, forest land in the east of Shanxi province and main rivers such as the Yellow River and Wei River are the ESV hot spot cluster area.The forest land, water area and cropland are of great significance for the change of ESV in the studied area. The long-term macro-rule of ESV in the concerned area is obtained, which are expected to provide theoretical support for regional ecological environment protection, compensation and urban development planning in Guanzhong plain urban agglomeration in the future.