Institutional Repository of Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (KLCEP)
| Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta | |
Han, Guangxuan1 ; Xing, Qinghui1; Yu, Junbao1; Luo, Yiqi2; Li, Dejun2; Yang, Liqiong1; Wang, Guangmei1; Mao, Peili1; Xie, Baohua1; Mikle, Nate2; Yu, JB (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China. gxhan@yic.ac.cn; jbyu@yic.ac.cn
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| Source Publication | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
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| ISSN | 0167-8809 |
| 2014-10-15 | |
| Volume | 196Pages:187-198 |
| Keyword | Eddy Covariance Ecosystem Co2 Exchange Coastal Wetlands Agricultural Reclamation Yellow River Delta |
| DOI | 10.1016/j.agee.2013.09.012 |
| Contribution Rank | [Han, Guangxuan; Xing, Qinghui; Yu, Junbao; Yang, Liqiong; Wang, Guangmei; Mao, Peili; Xie, Baohua] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China; [Luo, Yiqi; Li, Dejun; Mikle, Nate] Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA |
| Department | 中科院海岸带环境过程与生态修复重点实验室 |
| Abstract | Little is known about the impacts of agricultural exploitation of coastal wetlands on ecosystem CO2 exchange, although coastal wetlands have been widely reclaimed for agricultural use across the world. We measured net ecosystem CO2 exchange (NEE) and its major components, gross primary production (GPP) and ecosystem respiration (R-eco) using an eddy covariance flux technique in a natural coastal wetland (reed) and an adjacent, newly reclaimed farmland (cotton) in the Yellow River Delta, China. The results showed that agricultural reclamation changed the ecosystem CO2 exchange of the coastal wetland at three distinct levels. Initially, the conversion from the wetland to farmland changed the light response parameters (alpha, A(max), and R-eco, day) of NEE and temperature sensitivity (Q(10)) of R-eco mainly by changing the dominant vegetation type. Over the growing season, NEE, R-eco and GPP were significantly correlated with LAI at both sites and aboveground biomass at the farmland site. Next, the reclamation of wetland modified the diurnal and seasonal dynamics of ecosystem CO2 exchange. Significant differences in diurnal variations of NEE between the wetland and farmland sites were found during the growing season (with the exception of June and July). Seasonal means of daily GPP and R-eco values at the wetland site were higher than those at the farmland. Ultimately, the agricultural reclamation altered the CO2 sequestration capacity of the coastal wetland. The cumulative NEE in the wetland (-237.4 g Cm-2) was higher than that in the farmland (-202.0 g Cm-2). When biomass removal was taken into account, the farmland was a strong source for CO2 of around 131.9 g Cm-2 during the growing season. Overall, land use changes by reclamation altered ecosystem CO2 exchange at several ecological scales by changing the dominant vegetation type and altering the ecosystem's natural development. (C) 2013 Elsevier B.V. All rights reserved.; Little is known about the impacts of agricultural exploitation of coastal wetlands on ecosystem CO2 exchange, although coastal wetlands have been widely reclaimed for agricultural use across the world. We measured net ecosystem CO2 exchange (NEE) and its major components, gross primary production (GPP) and ecosystem respiration (R-eco) using an eddy covariance flux technique in a natural coastal wetland (reed) and an adjacent, newly reclaimed farmland (cotton) in the Yellow River Delta, China. The results showed that agricultural reclamation changed the ecosystem CO2 exchange of the coastal wetland at three distinct levels. Initially, the conversion from the wetland to farmland changed the light response parameters (alpha, A(max), and R-eco, day) of NEE and temperature sensitivity (Q(10)) of R-eco mainly by changing the dominant vegetation type. Over the growing season, NEE, R-eco and GPP were significantly correlated with LAI at both sites and aboveground biomass at the farmland site. Next, the reclamation of wetland modified the diurnal and seasonal dynamics of ecosystem CO2 exchange. Significant differences in diurnal variations of NEE between the wetland and farmland sites were found during the growing season (with the exception of June and July). Seasonal means of daily GPP and R-eco values at the wetland site were higher than those at the farmland. Ultimately, the agricultural reclamation altered the CO2 sequestration capacity of the coastal wetland. The cumulative NEE in the wetland (-237.4 g Cm-2) was higher than that in the farmland (-202.0 g Cm-2). When biomass removal was taken into account, the farmland was a strong source for CO2 of around 131.9 g Cm-2 during the growing season. Overall, land use changes by reclamation altered ecosystem CO2 exchange at several ecological scales by changing the dominant vegetation type and altering the ecosystem's natural development. (C) 2013 Elsevier B.V. All rights reserved. |
| Subtype | Article |
| Funding Organization | Agriculture ; Environmental Sciences & Ecology |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | CARBON-DIOXIDE EXCHANGE ; QINGHAI-TIBETAN PLATEAU ; LAND-USE CHANGE ; GRASSLAND ECOSYSTEMS ; SEASONAL-VARIATION ; INNER-MONGOLIA ; WATER WETLAND ; SOIL ; CHINA ; VARIABILITY |
| WOS Research Area | Agriculture ; Environmental Sciences & Ecology |
| WOS ID | WOS:000343019000023 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.yic.ac.cn/handle/133337/8701 |
| Collection | 中科院海岸带环境过程与生态修复重点实验室 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 Author | Yu, JB (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China. gxhan@yic.ac.cn; jbyu@yic.ac.cn |
| Affiliation | 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China 2.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA |
| Recommended Citation GB/T 7714 | Han, Guangxuan,Xing, Qinghui,Yu, Junbao,et al. Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2014,196:187-198. |
| APA | Han, Guangxuan.,Xing, Qinghui.,Yu, Junbao.,Luo, Yiqi.,Li, Dejun.,...&jbyu@yic.ac.cn.(2014).Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,196,187-198. |
| MLA | Han, Guangxuan,et al."Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 196(2014):187-198. |
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