Effects of episodic flooding on the net ecosystem CO2 exchange of a supratidal wetland in the Yellow River Delta
Han, GX; Chu, XJ; Xing, QH; Li, DJ; Yu, JB; Luo, YQ; Wang, GM; Mao, PL; Rafique, R; Han, GX (reprint author), Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China. gxhan@yic.ac.cn; jbyu@yic.ac.cn
2015-08-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume120Issue:8Pages:1506-1520
Contribution Rank[Han, Guangxuan; Chu, Xiaojing; Xing, Qinghui; Yu, Junbao; Wang, Guangmei; Mao, Peili] Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China; [Li, Dejun] Chinese Acad Sci, Inst Subtrop Agr, Changsha, Hunan, Peoples R China; [Luo, Yiqi] Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA; [Rafique, Rashad] Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD USA
AbstractEpisodic flooding due to intense rainfall events is characteristic in many wetlands, which may modify wetland-atmosphere exchange of CO2. However, the degree to which episodic flooding affects net ecosystem CO2 exchange (NEE) is poorly documented in supratidal wetlands of coastal zone, where rainfall-driven episodic flooding often occurs. To address this issue, the ecosystem CO2 fluxes were continuously measured using the eddy covariance technique for 4 years (2010-2013) in a supratidal wetland in the Yellow River Delta. Our results showed that over the growing season, the daily average uptake in the supratidal wetland was -1.4, -1.3, -1.0, and -1.3 g Cm-2 d(-1) for 2010, 2011, 2012, and 2013, respectively. On the annual scale, the supratidal wetland functioned as a strong sink for atmospheric CO2, with the annual NEE of -223, -164, and -247 g Cm-2 yr(-1) for 2011, 2012, and 2013, respectively. The mean diurnal pattern of NEE exhibited a smaller range of variation before episodic flooding than after it. Episodic flooding reduced the average daytime net CO2 uptake and the maximum rates of photosynthesis. In addition, flooding clearly suppressed the nighttime CO2 release from the wetland but increased its temperature sensitivity. Therefore, effects of episodic flooding on the direction and magnitude of NEE should be considered when predicting the ecosystem responses to future climate change in supratidal wetlands.
Department中科院海岸带环境过程与生态修复重点实验室
DOI10.1002/2015JG002923
Funding OrganizationNational Natural Science Foundation of China(41301083 ; National Science and Technology Support Program of China(2011BAC02B01) ; 41301052)
Indexed BySCI
WOS KeywordCARBON-DIOXIDE EXCHANGE ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; FLUX MEASUREMENTS ; OMBROTROPHIC BOG ; COASTAL WETLAND ; PEATLAND ; CHINA ; RESPIRATION ; TOLERANCE
SubtypeArticle
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS IDWOS:000363332300004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/9473
Collection中科院海岸带环境过程与生态修复重点实验室_滨海湿地实验室
Corresponding AuthorHan, GX (reprint author), Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China. gxhan@yic.ac.cn; jbyu@yic.ac.cn
Recommended Citation
GB/T 7714
Han, GX,Chu, XJ,Xing, QH,et al. Effects of episodic flooding on the net ecosystem CO2 exchange of a supratidal wetland in the Yellow River Delta[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2015,120(8):1506-1520.
APA Han, GX.,Chu, XJ.,Xing, QH.,Li, DJ.,Yu, JB.,...&jbyu@yic.ac.cn.(2015).Effects of episodic flooding on the net ecosystem CO2 exchange of a supratidal wetland in the Yellow River Delta.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(8),1506-1520.
MLA Han, GX,et al."Effects of episodic flooding on the net ecosystem CO2 exchange of a supratidal wetland in the Yellow River Delta".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.8(2015):1506-1520.
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