Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China
Han, Guangxuan1; Yang, Liqiong1,2; Yu, Junbao1; Wang, Guangmei1; Mao, Peili1; Gao, Yongjun3
2013-03-01
发表期刊ESTUARIES AND COASTS
ISSN1559-2723
卷号36期号:2页码:401-413
产权排序[Han, Guangxuan; Yang, Liqiong; Yu, Junbao; Wang, Guangmei; Mao, Peili] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China; [Yang, Liqiong] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China; [Gao, Yongjun] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA
摘要Using the Eddy Covariance (EC) technique, we analyzed temporal variation in net ecosystem CO2 exchange (NEE) and determined the effects of environmental factors on the balance between ecosystem photosynthesis and respiration in a reed (Phragmites australis) wetland in the Yellow River Delta, China. Our results indicated that diurnal and seasonal patterns of NEE and its components (ecosystem respiration (R (eco)), gross primary production (GPP)) varied markedly among months for the growing season (May to October). The cumulative CO2 emission was 1,657 g CO2 m(-2), while 2,612 g CO2 m(-2) was approximately accumulated as GPP, which resulted in the reed wetland being a net sink of 956 g CO2 m(-2). The ratio of R (eco) to GPP in reed wetland was 0.68, which was close to other temperate wetlands. Soil temperature and soil moisture exerted the primary controls on R (eco) during the growing season. Daytime NEE values during the growing season were strongly correlated with photosynthetically active radiation. Aboveground biomass showed significant linear relationships with 24-h average NEE, daytime GPP, and R (eco), respectively. Thus, we conclude that the coastal wetland acted as a carbon sink during the growing season despite the variations in environmental conditions, and long-term flux measurements over these ecosystems are undoubtedly necessary.; Using the Eddy Covariance (EC) technique, we analyzed temporal variation in net ecosystem CO2 exchange (NEE) and determined the effects of environmental factors on the balance between ecosystem photosynthesis and respiration in a reed (Phragmites australis) wetland in the Yellow River Delta, China. Our results indicated that diurnal and seasonal patterns of NEE and its components (ecosystem respiration (R (eco)), gross primary production (GPP)) varied markedly among months for the growing season (May to October). The cumulative CO2 emission was 1,657 g CO2 m(-2), while 2,612 g CO2 m(-2) was approximately accumulated as GPP, which resulted in the reed wetland being a net sink of 956 g CO2 m(-2). The ratio of R (eco) to GPP in reed wetland was 0.68, which was close to other temperate wetlands. Soil temperature and soil moisture exerted the primary controls on R (eco) during the growing season. Daytime NEE values during the growing season were strongly correlated with photosynthetically active radiation. Aboveground biomass showed significant linear relationships with 24-h average NEE, daytime GPP, and R (eco), respectively. Thus, we conclude that the coastal wetland acted as a carbon sink during the growing season despite the variations in environmental conditions, and long-term flux measurements over these ecosystems are undoubtedly necessary.
通讯作者Yu, JB (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Chunhui Rd 17, Yantai 264003, Shandong, Peoples R China. jbyu@yic.ac.cn
关键词Net Ecosystem Co2 Exchange Eddy Covariance Coastal Wetlands Environmental Control Yellow River Delta
作者部门中科院海岸带环境过程与生态修复重点实验室
学科领域Environmental Sciences ; Marine & Freshwater Biology
项目资助者National Science and Technology Support Program of China [2011BAC02B01]; Chinese Academy of Sciences [kzcx2-yw-223]; CAS/SAFEA International Partnership Program for Creative Research Teams (Representative environmental processes and resources effects in coastal zone); Chinese Academy of Sciences
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收录类别SCI
关键词[WOS]CARBON-DIOXIDE EXCHANGE ; QINGHAI-TIBETAN PLATEAU ; SOIL RESPIRATION ; SEASONAL-VARIATION ; EDDY COVARIANCE ; FLUX MEASUREMENTS ; PLANT BIOMASS ; TEMPERATURE ; MARSH ; WATER
文章类型Article
语种英语
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS记录号WOS:000316015000013
引用统计
被引频次:20[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.cn/handle/133337/6613
专题中科院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA
第一作者单位中国科学院烟台海岸带研究所
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Han, Guangxuan,Yang, Liqiong,Yu, Junbao,et al. Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China[J]. ESTUARIES AND COASTS,2013,36(2):401-413.
APA Han, Guangxuan,Yang, Liqiong,Yu, Junbao,Wang, Guangmei,Mao, Peili,&Gao, Yongjun.(2013).Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China.ESTUARIES AND COASTS,36(2),401-413.
MLA Han, Guangxuan,et al."Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China".ESTUARIES AND COASTS 36.2(2013):401-413.
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