Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta
	Han, Guangxuan1 ; Xing, Qinghui 1; Yu, Junbao1 ; Luo, Yiqi 2; Li, Dejun 2; Yang, Liqiong 1; Wang, Guangmei1 ; Mao, Peili 1; Xie, Baohua1 ; Mikle, Nate 2
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2014-10-15
卷号	196 页码:187-198
关键词	Eddy covariance Ecosystem CO2 exchange Coastal wetlands Agricultural reclamation Yellow River Delta
ISSN号	0167-8809
通讯作者	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
产权排序	[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
中文摘要	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.
英文摘要	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.
学科主题	Agriculture, Multidisciplinary; Ecology; Environmental Sciences
研究领域[WOS]	Agriculture ; Environmental Sciences & Ecology
关键词[WOS]	CARBON-DIOXIDE EXCHANGE ; QINGHAI-TIBETAN PLATEAU ; LAND-USE CHANGE ; GRASSLAND ECOSYSTEMS ; SEASONAL-VARIATION ; INNER-MONGOLIA ; WATER WETLAND ; SOIL ; CHINA ; VARIABILITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000343019000023
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/8701]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室烟台海岸带研究所_滨海湿地实验室
作者单位	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
推荐引用方式 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.,...&Mikle, Nate.(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.