生态学杂志2024，Vol.43Issue(11)：3433-3442,10.DOI:10.13292/j.1000-4890.202411.006
江苏滨海盐沼湿地碳动态时空差异及其对气候变化的响应
Spatial-temporal variations of carbon dynamics and their responses to climate change in Jiangsu coastal salt marshes
摘要
Abstract
Coastal salt marshes are important blue carbon sink,which are sensitive to climate change.Assessing the carbon sink capacity of coastal salt marshes and their response to climate change is of great significance for China to achieving the carbon peaking and carbon neutrality goals.In this study,the DNDC(Denitrification-Decomposition)model was utilized to simulate the temporal and spatial variations of carbon sink in coastal salt marshes in different regions of Jiangsu Province,and to explore the responses of three typical salt marshes dominated by Phragmites aus-tralis,Suaeda salsa and Spartina alterniflora to long-term climate change.From 1981 to 2020,the total carbon sink of Jiangsu coastal salt marshes was 9.70 Tg C,and the total global warming potential(GWP)was-19.24 Tg CO2-eq,with the largest total carbon sink and the negative effect on warming of Sheyang.Spatially,the carbon sink capacity and GWP in southern Jiangsu were greater than those in the north,and varied among the three types of salt marshes.The carbon sink capacity was in a descending order of Spartina alterniflora,Phragmites australis,and Suaeda salsa,while GWP followed an order of Phragmites australis＜Spartina alterniflora＜Suaeda salsa.In terms of interannual variation,net primary productivity(NPP)and GWP of the three salt marshes in various sites showed an increasing trend from 1981 to 2020.The carbon sink capacity varied greatly across different years,but the chan-ging trend was not obvious on the whole.With the increase of temperature,NPP of Suaeda salsa and Spartina alter-niflora increased,while that of Phragmites australis decreased.The changes in CH4 and N2O emissions were signifi-cantly greater than those of NPP.CH4 and N2O emissions increased significantly except for the different trends of N2O emissions in Phragmites australis in different regions.Rainfall was positively correlated with NPP and CH4 emissions in Phragmites australis and Spartina alterniflora,while Suaeda salsa showed an opposite pattern.Rainfall was positively correlated with N2O emissions in three salt marshes.关键词
盐沼湿地/滨海蓝色碳汇/碳动态/气候变化/DNDC模型Key words
salt marsh/coastal blue carbon/carbon dynamics/climate change/DNDC model引用本文复制引用
万安娜,韩其飞,李超凡,王文彪,崔正南..江苏滨海盐沼湿地碳动态时空差异及其对气候变化的响应[J].生态学杂志,2024,43(11):3433-3442,10.基金项目
国家自然科学基金项目(42271493和42177436)资助. （42271493和42177436）
