Changes of Urban Wetlands Landscape and Carbon Storage Evaluation—A Case Study at Harbin City
To provide scientific basis for promoting carbon sequestration and sustainable development,this study evaluated the temporal and spatial variation characteristics of urban wetland landscape and carbon storage in Harbin City.By combining remote sensing(RS)images and geographic information system(GIS)analysis,this research extracted wetlands landscape and calculated landscape characteristics changes of Harbin city from 1985 to 2021.The carbon pool size of vegetation and soil was calculated based on 44 wetlands sample plots,and the changes of wetland vegetation and soil carbon storage were then estimated using InVEST model.The research results indicated that in the 36 years of urbanization,the percentage of wetland landscape peaked at 1993,and the extent of landscape fragmentation was also lowest in 1993.From 2001 to 2021,the percentage of wetlands landscape gradually increased,and the fragmentation trend decreased.For 36 years urbanization,24%(27 km2)of wetlands landscape was disappeared in Harbin City,and the loss of wetlands landscape was mainly located outside the Songhua River region.Field investigation and model estimation results showed that the carbon storage per unit area in vegetation was 56.92 tons per hectare,and the soil carbon storage was 20.65 tons per hectare.From 1985 to 2021,the total carbon storage of wetlands landscape changed significantly.From 1985 to 2014,the total carbon storage decreased from 614,000 tons to 325,000 tons.However,during 2014-2021,the total carbon storage of urban wetlands increased.In 2021,the total carbon storage reached 355,000 tons.Reasonable protection of urban wetlands landscape will have positive significance for the improvement of total carbon storage.
万方数据
维普
