Characteristics of N2O Flux in Estuary Wetland of Jiaozhou Bay in Autumn and Winter

  • Department of Environmental Science, Qingdao University, Qingdao, Shangdong 266071, China

Received date: 2010-08-16

  Revised date: 2011-03-12

  Online published: 2011-04-20


Characteristics of N2O flux in Phragrmites australis wetland affected by tides and weeds wetland without flooding perennial in the Dagu river estuary of Jiaozhou Bay in autumn and winter were observed using a static chamber and gas chromatograph technique from September 2009 to February 2010. N2O emission and absorption of the two types of wetlands have a significant diurnal variation. Day maximums occurred at 12 o'clock and 21 o'clock, and the minimum value were usually at about 6 o'clock in the morning. The maximum values in Phragrmites australis wetland and weeds wetland were 151.1μg/(m2·h), 29.3μg/(m2·h) and the minimum values were-128.9μg/(m2·h) and-21.5μg/(m2·h), respectively. N2O flux in Phragrmites australis wetland in autumn and winter during the day time was 1.54 and 2.09 times as much as that in the night, respectively. And there were more N2O fluxes from weeds wetland in the day than during the night in autumn, just the opposite for winter. The highest monthly emissions of N2O in Phragrmites australis wetland and weeds wetland were 42.42 mg/m2, 6.89 mg/m2 and they were observed in November. Monthly N2O fluxes in Phragrmites australis wetland were more than weeds wetland. Seasonal N2O emissions in autumn and winter were 56.32 mg/m2and 63.38 mg/m2 in Phragrmites australis wetland, and 10.45 mg/m2 and 3.08 mg/m2 in weeds wetland, respectively. N2O flux from weeds wetland in autumn and winter was 5.39 and 20.58 times as much as that from Phragrmites australis wetland which caused by different hydrologic characteristics of wetlands and the different types of vegetation. Further analysis indicated that N2O fluxes in weeds wetland in autumn and winter were significantly positively correlated with 5cm, 10cm ground temperature(P<0.05). The relation between N2O fluxes in Phragrmites australis wetland and 5cm,10cm ground temperature was not significantly, N2O emission and absorption in Phragrmites australis wetland was influenced largely by the tides. In addition to affected by temperature at monitoring sites, the process of alternating wet and dry, water level, salinity and tidal effected the emissions and absorption of N2O greatly. In autumn and winter, Phragrmites australis wetland and weeds wetland in the Dagu river estuary of Jiaozhou Bay were the "source"of atmospheric N2O.

Cite this article

XIE Wen-xia, ZHAO Quan-sheng, ZHAG Fang, MA Xiao-fei . Characteristics of N2O Flux in Estuary Wetland of Jiaozhou Bay in Autumn and Winter[J]. SCIENTIA GEOGRAPHICA SINICA, 2011 , 31(4) : 464 -469 . DOI: 10.13249/j.cnki.sgs.2011.04.464


[1] Wang W C, Yung Y L, Lacis A A, et al. Greenhouse effects clue to man-mad perturbations of trace gases [J]. Science, 2000,194: 685-690.
[2] 齐玉春,董云社. 中国能源领域温室气体排放现状及减排对策研究[J]. 地理科学, 2004, 24(5):528~533.
[3] Jain A K, Briegleb B P, Minschwaner K, et al. Radiative forcings and global warming potentials of 39 green-house gases[J]. Journal of Geophysical Research,2000, 105: 20773-20790.
[4] Mooney H A, Vitousek P M, Matson P A. Exchange of materials between terrestrial ecosystems and the atmosphere [J]. Science,1987, 238: 926-932.
[5] 刘子刚. 湿地生态系统碳储存和温室气体排放研究[J]. 地理科学, 24(5):635~639.
[6] Meure C M, Etheridge D, Trudinger C, et al. Law Dome CO2, CH4 and N2O ice core records extended to 2000 years BP. [J].Geophys Res Lett, 2006, 33(14), doi: 10.1029/2006GL026152.
[7] 王毅勇,杨青,王瑞. 三江平原大豆田氮循环模拟研究[J]. 地理科学, 1999,19(6):555~558.
[8] 宋长春, 王毅勇, 王跃思, 等. 人类活动影响下淡水沼泽湿地温室气体排放变化[J]. 地理科学, 2006,26(1):82~86.
[9] 王东启, 陈振楼, 王军, 等. 夏季长江河口潮间带反硝化作用和N2O的排放与吸收[J]. 地球化学, 2006, 35 (3):271~279.
[10] 徐继荣, 王友绍, 殷建平, 等. 珠江口入海河段DIN形态转化与硝化和反硝化作用[J]. 环境科学学报, 2005, 25(5):686-692.
[11] Bange H W, Rapsomanikis S, Andrea M O. Nitrous oxide in coastal waters. [J]. Global Biogeochemitry Cycles,1996, 10:197-207.
[12] Naqvi S W A, Jayakumar D A, Narvekar P V. et al. Increased marine production of N2O due to intensifying anoxia on the Indian continental shelf[J]. Nature. 2000, 408:346-349.
[13] 李佩佩, 张桂玲, 赵静, 等. 胶州湾及周边海域大气和海水中N2O和CH4的分布及海气交换通量[J]. 中国海洋大学学报, 2009, 39(4):805~814.
[14] 耿以龙, 王希明, 陈庆道, 等. 青岛胶州湾湿地水鸟资源现状及保护对策[J]. 湿地科学与管理, 2006, 2(2): 45~48.
[15] 王艳玲, 崔文连, 刘峰, 等. 青岛市大沽河河口区生态环境现状研究[J]. 中国环境监测, 2007, 23(3):77~80.
[16] 孙志高, 刘景双, 杨继松, 等. 生长季和非生长季小叶章湿地N2O通量特征及排放贡献[J]. 草叶学报,2009, 18(6):242~247.
[17] 刘惠, 赵平, 孙谷畴, 等. 华南丘陵区冬闲稻田二氧化碳、甲烷和氧化亚氮的排放特征[J]. 应用生态学报, 2007, 18(1): 57~62.
[18] Hou A X, Chen G X, Wang Z P, et al. Methane and nitrous oxide emissions from a rice field in relation to soil redox and microbiological processes [J]. Soil Sci Soc Am J, 2000, 64(6): 131-139.
[19] 于君宝,刘景双, 孙志高, 等.中国东北区淡水沼泽湿地N2O和CH4排放通量及主导因子[J]. 中国科学D辑:地球科学, 2009, 39(2):177~187.
[20] 王德宣,宋长春,王跃思,等.若尔盖高原沼泽湿地N2O排放通量研究[J].生态科学,2005,24(3):193~196.
[21] Teepe R, Brumme R, Beese F. Nitrous oxide emission from frozen soils under agricultural,fallow and forest land[J]. Soil Biology and Biochemistry 2000,32:1807-1810.
[22] 陈冠雄, 黄斌, 黄国宏, 等. 稻田N2O和CH4通量测定及总量估算[J].温室气体浓度和排放监测及相关过程[M].北京:环境科学出版社,1996,343~350.