首页|海岸带景观破碎化对固碳服务流的影响

海岸带景观破碎化对固碳服务流的影响

Impacts of landscape fragmentation of coastal zone on carbon sequestration service flow

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蓝碳作为解决全球气候变化问题的长期方案之一,其和谐的供需动态关系对促进区域碳平衡和可持续管理具有重要意义.随着海岸带社会经济的快速发展,海岸带景观破碎化显著,直接影响其系统中能量流、物质循环等生态过程.然而,海岸带景观破碎化对固碳服务供需关系及流的影响尚不明确.基于此,本文在建立海岸带景观破碎化对固碳服务流影响框架基础上,综合土地利用数据、碳储量采样数据和夜间灯光数据,运用移动窗口法、InVEST模型及网络模型,以中国北方典型淤泥质海岸带——辽河三角洲为例开展实证研究.结果表明:① 1995-2020年随着辽河三角洲景观破碎化加剧,固碳服务需求量增加3044万t,固碳服务供给量先增后减,整体变化不显著,固碳服务供需差从1995年449万t增加到2020年3376万t;②不同人类活动强度导致的景观破碎化对固碳服务流流量的负面影响存在差异,其中对农业围垦区更为显著,对工业港口围垦区的影响呈先增后减趋势,而对芦苇湿地作用甚微;③景观破碎化对固碳服务流空间格局的影响体现在固碳服务流网络密度及连通性上,其引起服务流中断、服务流方向改变;④芦苇保护区和农业围垦区具有重要生态功能,应严格控制生态红线提升碳汇能力;工业港口围垦区应加强生态廊道建设,提升景观连通性,恢复碳汇功能.本文揭示景观破碎化与固碳服务流的关系,研究结果可为中国保护性战略重点区乃至全球其他类似淤泥质海岸带的生态修复和碳汇能力提升提供科学依据及管理参考.
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

闫晓露、武帅、吴雪雪、王煜景然、胡远满

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辽宁师范大学海洋可持续发展研究院教育部人文社科重点研究基地,大连 116029

辽宁省"海洋经济高质量发展"高校协同创新中心,大连 116029

中国科学院沈阳应用生态研究所,沈阳 110016

景观破碎化 蓝碳 固碳服务流 海岸带 美丽中国

中国科学院战略性先导科技专项国家自然科学基金教育部人文社会科学研究项目教育部学位与研究生教育发展中心主题案例项目辽宁省社科联2023年度辽宁省经济社会发展研究课题

XDA231004034210111321YJCZH193ZT-2210165042023lslybkt-081

2024

10.11821/dlxb202401008

地理学报
中国地理学会 中国科学院地理科学与资源研究所

地理学报

CSTPCDCSSCICHSSCD北大核心
影响因子：3.3
ISSN：0375-5444
年,卷(期)：2024.79(1)
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