Impacts of landscape fragmentation of coastal zone on carbon sequestration service flow
As one of the long-term solutions to the global climate change problem,the harmonious dynamic relationship between supply and demand of blue carbon is of great significance in promoting regional carbon balance and sustainable management.With the rapid socio-economic development,the landscape fragmentation of the coastal zone is significant,which directly affects the ecological processes such as energy flow and material circulation in its system.However,the effects of coastal zone landscape fragmentation on the supply-demand relationship and flow of carbon sequestration services are not clear.Based on the framework of the impact of coastal landscape fragmentation on carbon sequestration service flow,this study synthesizes land use data,carbon storage sampling data and nighttime light data,and employs the moving window method,the InVEST model and the network model to conduct an empirical study in the Liaohe River Delta,a typical silty coastal zone in northern China.The results show that:(1)From 1995 to 2020,with the intensification of landscape fragmentation in the Liaohe River Delta,the demand for carbon sequestration services increased by 30.44 million tons and the supply of carbon sequestration services increased and then decreased,with the overall change being insignificant,and the difference between the supply and demand of carbon sequestration services increased from 4.49 million tons in 1995 to 33.76 million tons in 2020.(2)The negative impact of landscape fragmentation on the carbon sequestration service flow varied among different anthropogenic intensity,with more pronounced impact on agricultural reclamation areas,increasing and then decreasing impact on industrial port reclamation areas,while little impact on reed wetlands.(3)The impact of landscape fragmentation on the spatial pattern of carbon sequestration service flow is reflected in the density and connectivity of carbon sequestration service flow network,interrupting service flow and changing the direction of service flow.(4)The reed protection areas and agricultural reclamation areas have important ecological functions,and ecological red line should be strictly controlled to enhance carbon sequestration capacity.The industrial port reclamation areas should strengthen the construction of ecological corridors to enhance landscape connectivity and restore carbon sink function.This study reveals the relationship between landscape fragmentation and carbon sequestration service flow,and the results can provide scientific basis and management reference for ecological restoration and carbon sequestration capacity enhancement in China's conservation strategic key areas and other similar silt coastal zones around the world.
landscape fragmentationblue carboncarbon sequestration service flowcoastal zoneBeautiful China
万方数据
维普
