生态学报2025，Vol.45Issue(7)：3111-3124,14.DOI:10.20103/j.stxb.202407291790
1990年以来长江口及邻近海岸盐沼湿地蓝碳时空格局
Spatiotemporal patterns of blue carbon stocks in tidal marsh of the Yangtze Estuary and adjacent coasts since 1990
摘要
Abstract
Intensifying global warming has directed significant attention towards coastal tidal marshes for their efficient carbon sequestration capabilities.In recent years,tidal marshes in China have been facing the dual stresses of species invasion and reclamation disturbance,posing severe challenges to their carbon sink function.This study focused on the tidal marshes of the Yangtze Estuary.We assessed the dynamics in carbon density and the spatiotemporal heterogeneity of blue carbon stocks across different coastal sections and plant communities,employing field surveys,laboratory analyses,and remote sensing techniques.The results revealed that:(1)From 1990 to 2022,the area of tidal marshes in the Yangtze Estuary initially shrank and then expanded,with invasive Spartina alterniflora gradually replacing Phragmites australis as the dominant species,constituting 53.33％of the total tidal marsh area by 2022.(2)In coastal sections with long-term S.alterniflora invasion,both biomass carbon density and sediment carbon density were significantly higher than those of the native P.australis and Scirpus mariqueter communities.(3)In 2022,the total blue carbon stocks in the tidal marshes of the Yangtze Estuary reached(2794.84±691.04)Gg C,with.S.alterniflora wetlands contributing over half(57％).Regionally,Chongming Island,Jiuduansha Shoal,and Nanhui Dongtan Shoal emerged as hotspots of blue carbon stocks within the Yangtze Estuary.(4)The expansion of S.alterniflora has become a key driver in the evolution of blue carbon pattern in the Yangtze Estuary over the past 33 years.Its carbon stocks increased from 27.88×104 t in 2000 to 160×104 t in 2022,while during the same period,the carbon stocks of P.australis and S.mariqueter decreased by 32％and 8％,respectively.This study enhances our understanding of blue carbon dynamics in the Yangtze Estuary tidal marshes and supports the assessment of estuarine carbon sink potential and invasive species management strategies.关键词
滨海盐沼/蓝碳/互花米草/沉积物/长江口/时空格局Key words
coastal tidal marsh/blue carbon/Spartina alterniflora/sediment/Yangtze Estuary/spatiotemporal patterns引用本文复制引用
赵文祯,林世伟,张正龙,袁琳,杨华蕾,贾俊鹤,纪焕红,李秀珍..1990年以来长江口及邻近海岸盐沼湿地蓝碳时空格局[J].生态学报,2025,45(7):3111-3124,14.基金项目
国家自然科学基金重点专项(42141016) （42141016）
国家重点研发计划项目(2023YFE0113100) （2023YFE0113100）
上海市生态环境局科研项目(沪环科[2022]第10号) （沪环科[2022]第10号）
