Sun, Baoyu1,2,3,4; Yan, Liming1,5; Jiang, Ming1,5; Li, Xinge1,4,6; Han, Guangxuan1,4,6
; Xia, Jianyang1,5发表期刊ECOLOGY
ISSN0012-9658
2020-11-30
页码12
关键词climate warmingcoastal wetlandsecosystem carbon fluxesseasonalitysoil salinityspecies composition
DOI10.1002/ecy.3236
通讯作者Yan, Liming(lmyan@des.ecnu.edu.cn)
英文摘要Coastal wetlands have the highest carbon sequestration rate per unit area among all unmanaged natural ecosystems. However, how the magnitude and seasonality of the CO2 sink in coastal wetlands will respond to future climate warming remains unclear. Here, based on measurements of ecosystem CO2 fluxes in a field experiment in the Yellow River Delta, we found that experimental warming (i.e., a 2.4 degrees C increase in soil temperature) reduced net ecosystem productivity (NEP) by 23.7% across two growing seasons of 2017-2018. Such a reduction in NEP resulted from the greater decrease in gross primary productivity (GPP) than ecosystem respiration (ER) under warming. The negative warming effect on NEP mainly occurred in summer (-43.9%) but not in autumn (+61.3%), leading to a shifted NEP seasonality under warming. Further analyses showed that the warming effects on ecosystem CO2 exchange were mainly controlled by soil salinity and its corresponding impacts on species composition. For example, warming increased soil salinity (+35.0%), reduced total aboveground biomass (-9.9%), and benefited the growth of plant species with high salt tolerance and late peak growth. To the best of our knowledge, this study provides the first experimental evidence on the reduced magnitude and shifted seasonality of CO2 exchange under climate warming in coastal wetlands. These findings underscore the high vulnerability of wetland CO2 sink in coastal regions under future climate change.
资助机构National Nature Science Foundation of China; Natural Science Foundation of Shanghai; Strategic Priority Research Program of the Chinese Academy of Sciences
收录类别SCI
语种英语
关键词[WOS]ECOSYSTEM CARBON EXCHANGE; CLIMATE-CHANGE; SOIL RESPIRATION; PLANT BIOMASS; SEA-LEVEL; PRECIPITATION; RESPONSES; SALINITY; BALANCE; FLUXES
研究领域[WOS]Environmental Sciences & Ecology
WOS记录号WOS:000594074700001
引用统计被引频次：2[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/28273
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
通讯作者Yan, Liming作者单位1.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, State Key Lab Estuarine & Coastal Res, Shanghai 200000, Peoples R China
2.East China Normal Univ, Joint Translat Sci & Technol Res Inst, Shanghai 200000, Peoples R China
3.Univ Haifa, Shanghai 200000, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Processes & Ecol R, Yantai 264000, Peoples R China
5.East China Normal Univ, Res Ctr Global Change & Ecol Forecasting, Shanghai 200000, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
推荐引用方式
GB/T 7714Sun, Baoyu,Yan, Liming,Jiang, Ming,et al. Reduced magnitude and shifted seasonality of CO2 sink by experimental warming in a coastal wetland[J]. ECOLOGY,2020:12.
APASun, Baoyu,Yan, Liming,Jiang, Ming,Li, Xinge,Han, Guangxuan,&Xia, Jianyang.(2020).Reduced magnitude and shifted seasonality of CO2 sink by experimental warming in a coastal wetland.ECOLOGY,12.
MLASun, Baoyu,et al."Reduced magnitude and shifted seasonality of CO2 sink by experimental warming in a coastal wetland".ECOLOGY (2020):12.
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