Reduced magnitude and shifted seasonality of CO2 sink by experimental warming in a coastal wetland
Sun, Baoyu1,2,3,4; Yan, Liming1,5; Jiang, Ming1,5; Li, Xinge1,4,6; Han, Guangxuan1,4,6; Xia, Jianyang1,5
Source PublicationECOLOGY
ISSN0012-9658
2020-11-30
Pages12
Keywordclimate warming coastal wetlands ecosystem carbon fluxes seasonality soil salinity species composition
DOI10.1002/ecy.3236
Corresponding AuthorYan, Liming(lmyan@des.ecnu.edu.cn)
AbstractCoastal 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.
Funding OrganizationNational Nature Science Foundation of China ; Natural Science Foundation of Shanghai ; Strategic Priority Research Program of the Chinese Academy of Sciences
Indexed BySCI
Language英语
WOS KeywordECOSYSTEM CARBON EXCHANGE ; CLIMATE-CHANGE ; SOIL RESPIRATION ; PLANT BIOMASS ; SEA-LEVEL ; PRECIPITATION ; RESPONSES ; SALINITY ; BALANCE ; FLUXES
WOS Research AreaEnvironmental Sciences & Ecology
WOS IDWOS:000594074700001
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/28273
Collection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
Corresponding AuthorYan, Liming
Affiliation1.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
Recommended Citation
GB/T 7714
Sun, 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.
APA Sun, 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.
MLA Sun, 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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