江苏响水-滨海港区海岸带景观演变及对区域碳储存的影响

Landscape Evolution of the Coastal Zone of Xiangshui-Binhai Port Area of Jiangsu Province and Its Impact on Regional Carbon Storage

利用3期遥感影像数据和InVEST碳储存模型,对响水-滨海港区海岸带景观演变过程及区域碳储存的动态响应进行了量化分析。结果表明:1984-2020年,研究区农田和盐田大规模转变为建设用地,盐沼、潮滩、未利用地和部分盐田主要转为养殖塘;区域碳储存总量因之丧失22.2万t,碳密度高值区在空间上直接减少15.7%;农田转为建设用地,是研究区碳储存功能退化的最主要驱动因子和贡献者,潮滩转为海水、潮滩转为养殖塘的碳储存损失相对较低。研究结果可为当地海岸带的生态修复和生态规划提供理论依据。

Based on the data of the three phases of remote sensing images and the InVEST carbon storage model,the landscape evolution process and the dynamic response of regional carbon storage in the coastal zone of Xiangshui-Binhai Port area were quantitatively analyzed.The results showed that from 1984 to 2020,the farmland and salt pans in the study area were converted into construction land on a large scale,and the salt marshes,tidal flats,unused land and part of the salt pans were mainly converted into aquaculture ponds.As a result,the total amount of regional carbon storage was lost by 222,000 t,and the high-value area of carbon density was directly reduced by 15.7%spatially.The conversion of farmland to construction land is the most important driving factor and contributor to the degradation of carbon storage function in the study area,while the conversion of tidal flats to seawater and tidal flats to aquaculture ponds also bring relatively low carbon storage losses.