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- W2390531062 abstract "Methane(CH 4),nitrous oxide(N 2 O) and carbon dioxide(CO 2) are primary greenhouse gases,many recent studies indicate that wetland is one of the major atmospheric greenhouse gases sources in the world. In order to understand the mechanisms and factors that influence greenhouse gases production in and emission from reed(Phragmites australis) wetland during its growth cycle,static closed chamber combined with a gas chromatograph technique was used to investigate the flues of three greenhouse gases(CH4,N2O and CO2) at a Phragmites australis wetland in Chongming Dongtan. The results showed that the flux of CH4 was greatly influenced by temperature, which the fluxes were significantly higher in summer than in other seasons. Annual average flux of CH4 is 74. 46 μg/(m2·h). The maximum flux of N2O is in winter and the annual average flux of N2O is 2. 22 μg/(m2·h). There is obviously seasonal change in CO2 absorption with the annual average flux as- 101. 93 mg/(m2·h). The production and emission of CH4 were also affected by the photosynthesis and respiration of Phragmites australis,while the Phragmites australis communities showed consumption of N2O because of the shortage and limitation of nitrogen in sediment. The emission and consumption of CO2 were mainly controlled by the photosynthesis of Phragmites australis and the soil respiration which was influenced by temperature seasonal change. The developed aerenchyma of Phragmites australis provides a channel which makes CH4 and N2O diffuse from atmosphere to sediments,meanwhile molecular diffusion process is also a way and methods that makes CH4,N2O and CO2 diffuse form sediments to atmosphere." @default.
- W2390531062 created "2016-06-24" @default.
- W2390531062 creator A5041570069 @default.
- W2390531062 date "2014-01-01" @default.
- W2390531062 modified "2023-09-22" @default.
- W2390531062 title "Greenhouse Gases Fluxes at Chongming Dongtan Phragmites australis Wetland and the Influencing Factors" @default.
- W2390531062 hasPublicationYear "2014" @default.
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