黄河口潮间盐沼湿地生长季净生态系统CO2交换特征及其影响因素

	黄河口潮间盐沼湿地生长季净生态系统CO2交换特征及其影响因素
其他题名	Net ecosystem CO2 exchange and its controlling factors during the growing season in an inter-tidal salt marsh in the Yellow River Estuary, China
	邢庆会 ; 韩广轩 ; 于君宝 ; 吴立新 ; 杨利琼 ; 毛培利 ; 王光美 ; 谢宝华
发表期刊	生态学报
ISSN	1000-0933
	2014
卷号	17 页码:17
关键词	涡度相关净生态系统co2交换潮间盐沼湿地潮汐淹水
产权排序	中国科学院烟台海岸带研究所;中国科学院海岸带环境过程与生态修复重点实验室;中国科学院大学;黄河三角洲国家级自然保护区管理局
通讯作者	韩广轩 E-mail:gxhan@yic.ac.cn
作者部门	中国科学院海岸带环境过程与生态修复重点实验室
英文摘要	潮间盐沼湿地生物地球化学过程独特,生态系统CO2交换存在着极大的复杂性和不确定性。利用2012年黄河口潮间盐沼湿地生态系统生长季(4—10月)连续的涡度相关观测数据,分析了潮间盐沼湿地的净生态系统CO2交换(net ecosystem CO2exchange,NEE)、总初级生产力(grossprimaryproductivity,GPP)和生态系统呼吸(ecosystemrespiration,Reco)的变化特征及其影响因素。结果表明:生长季,生态系统NEE具有明显的日变化和季节变化。日尺度上,表现为白天CO2净吸收,夜间CO2净释放,NEE日平均值为-0.38 g CO2 m-2 d-1...
中文摘要	Inter-tidal salt marsh plays a great important role in the global carbon cycle as a considerable potential capacity of the carbon sink. Compared to other types of wetlands, the inter-tidal salt marsh has a unique biogeochemical process under the combined action between freshwater and seawater. Therefore, there is considerable variability and uncertainty in its net ecosystem CO2 exchange (NEE). However, few studies provide insights regarding the variability of NEE and its controlling factors in an inter-tidal salt marsh. Using the Eddy Covariance (EC) technique, we analyzed temporal variation in NEE and determined its controlmechanisms coupled with meteorological and tidal inundation variables during the growing season (from April to October) of 2012 in an inter-tidal salt marsh in the Yellow River Estuary. The results showed that it was net CO2 absorption in the daytime and net CO2 release in the nighttime on a diurnal scale. The daily average NEE during the growing season was -0.38 g CO2 m-2 d-1, with a maximum daily CO2 uptake rate of -3.13 g CO2 m-2 d-1 (June 27) and a maximum release rate of 1.47 g CO2 m−2 d-1 (August 12). The monthly average NEE increased rapidly from May, and peaked in June, then decreasing gradually from July. The maximum monthly ecosystem respiration (Reco) was 15.16 g C m−2 in June when the hightest soil temperature was 27.5 ℃. The monthly gross primary productivity (GPP) reached its peaking value (25.07 g C m−2) in July. During the growing season, NEE was mainly dominated by photosynthetic active radiation (PAR), soil temperature (Ts), soil water content (SWC) and tidal inundation. There was a rectangular hyperbolic relationship between the daytime net ecosystem CO2 exchange (NEEdaytime) and PAR. The maximum ecosystem apparent quantum yield (α) and maximum photosynthesis rate (NEEsat) appeared in June (0.0086 ± 0.0019 μmol CO2 μmol-1 photons) and in May (4.79 ±1.52 μmol CO2 m−2 s-1), respectively. In addition, NEEdaytime also was positively correlated with Ts and SWC. During the growing season, NEEdaytime had an exponential relationship with Ts. The mean value of Q10 was 1.33, and it was positively related to SWC. During the typical sunny day of June 19 to June 25, tidal inundation enhanced daytime net absorption of CO2 and nighttime CO2 release. As a result, tidal inundation increased the net ecosystem CO2 absorption by an average of 0.76 g CO2 m-2 d-1. During the growing season, the inter-tidal salt marsh was a obvious CO2 sink (22.28 g C m-2), with a cumulative emission of 96.28 g C m-2 and a cumulative aborption of 118.34 g C m-2.
资助机构	国家自然科学基金(41301083);国家科技支撑计划项目(2011BAC02- B01);中国科学院知识创新工程重要方向项目(KZCX2-YW-223)
收录类别	CSCD
语种	中文
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/6816
专题	中国科学院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	邢庆会,韩广轩,于君宝,等. 黄河口潮间盐沼湿地生长季净生态系统CO2交换特征及其影响因素[J]. 生态学报,2014,17:17.
APA	邢庆会.,韩广轩.,于君宝.,吴立新.,杨利琼.,...&谢宝华.(2014).黄河口潮间盐沼湿地生长季净生态系统CO2交换特征及其影响因素.生态学报,17,17.
MLA	邢庆会,et al."黄河口潮间盐沼湿地生长季净生态系统CO2交换特征及其影响因素".生态学报 17(2014):17.

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