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题名:
Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China
作者: Han Guangxuan(韩广轩)1; Yang, Liqiong1,2; Yu, Junbao1; Wang, GuangMei(王光美)1; Mao, Peili1; Gao, Yongjun3
刊名: ESTUARIES AND COASTS
ISSN号: 1559-2723
出版日期: 2013-03-01
卷号: 36, 期号:2, 页码:401-413
关键词: Net ecosystem CO2 exchange ; Eddy covariance ; Coastal wetlands ; Environmental control ; Yellow River Delta
学科分类: Environmental Sciences; Marine & Freshwater Biology
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
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
作者部门: 中科院海岸带环境过程与生态修复重点实验室
中文摘要: 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.
英文摘要: 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.
研究领域[WOS]: Environmental Sciences & Ecology ; Marine & Freshwater Biology
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
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000316015000013
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/6613
Appears in Collections:中科院海岸带环境过程与生态修复重点实验室_期刊论文

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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

Recommended Citation:
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.
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