城市化过程对江苏省陆地生态系统服务的影响研究

Impacts of Urbanization on Terrestrial Ecosystem Services in Jiangsu Province

利用2000年和2015年江苏省土地利用数据、气象数据、粮食产量数据、NDVI数据等,使用生态系统供给和调节服务评估模型评估了生态系统粮食供给功能、固碳服务及蓄水服务,定量评价了城市化过程对江苏省陆地生态系统服务的影响。结果显示耕地转换为建设用地是最主要的土地利用变化方式,自2000—2015年江苏省建筑面积增加3693 km^(2)。全省固碳总量由6.2×10^(7) tC增加到7.2×10^(7) tC,可能与全球气候变暖及CO_(2)浓度上升的施肥效应使得单位面积植被净第一生产力(NPP)增加有关。蓄水服务评价结果显示相比2000年,2015年江苏省平均径流深度增加比例约为15.34%,与人口聚集、建设用地扩展导致的蓄水能力降低有关。

Based on the land use data,meteorological data,grain yield data and NDVI data of Jiang-su province in 2000 and 2015,this paper uses the ecosystem supply and regulation service evalua-tion model to evaluate the ecosystem food supply function,carbon sequestration service and water storage service,and quantitatively evaluates the impact of urbanization process on terrestrial ecosys-tem services in Jiangsu province.The results show that the conversion of cultivated land to construc-tion land is the most important way of land use change.From 2000 to 2015,the construction area of Jiangsu province increased by 3693 km^(2).The total amount of carbon sequestration increased from 6.2×10^(7) tC to 7.2×10^(7) tC,which may be related to the increase of net primary productivity(NPP)per unit area of vegetation caused by global warming and the fertilization effect of rising CO_(2) concentration.The results of water storage service evaluation show that compared with 2000,the av-erage runoff depth in Jiangsu province increased by about 15.34%in 2015,which is related to the decrease of water storage capacity caused by population aggregation and construction land expansion.