胶州湾潮滩湿地CHBr_3通量特征及影响因素研究
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摘要
在2016年7月~2017年5月期间,运用静态箱法对胶州湾潮滩湿地系统的CHBr_3排放通量进行了观测,并对影响CHBr_3通量的主要影响因子进行了探究.结果表明,胶州湾潮滩湿地是CHBr_3的排放源,互花米草湿地和光滩释放CHBr_3的通量均值分别为10.92nmol/(m~2?d)和8.96nmol/(m~2?d),说明互花米草湿地在一定程度上能够促进CHBr_3的排放.不同潮滩湿地之间CHBr_3的排放通量有明显区别.互花米草湿地在夏秋季节较高的CHBr_3通量可能主要是受温度和植被生物量的影响,光滩在冬春季节较高的CHBr_3通量可能与冻融循环过程有关.胶州湾潮滩湿地环境因素变化比较复杂,CHBr_3的排放通量受多种因素的影响.温度对CHBr_3排放通量的影响显著,而植被生长状况、水盐条件和营养元素等对CHBr_3排放通量的影响也不容忽视.
Characteristics of methenyl bromide(CHBr_3) fluxes from tidal wetlands of the Jiaozhou Bay were observed using static flux chambers methods during 2016/2017, and the key factors affecting CHBr_3 fluxes were discussed. The results showed that CHBr_3 average fluxes from S. alterniflora marsh and bare flat marsh were 10.92 nmol/(m2?d) and 8.96 nmol/(m~2?d), respectively, indicating that the tidal marsh ecosystems in the Jiaozhou Bay acted as CHBr_3 source. It indicates that S. alterniflora marshes could promote CHBr_3 emissions to some extent. The emission fluxes of CHBr_3 between different tidal marshes was distinctly different. The higher CHBr_3 emissions from the S. alterniflora marshes were occurred in summer and autumn were probably related to the effects of temperature and vegetation biomass. The higher fluxes of CHBr_3 in bare flat during early spring and winter may be related to the freeze-thaw cycle. The change of environmental factors in the tidal flat marsh of Jiaozhou Bay was complex, and the emission fluxes of CHBr_3 were affected by many factors. The dominant factor affected the CHBr_3 emission in S. alterniflora marsh of Jiaozhou Bay was temperature, while the influences of vegetation growth status and water and salinity condition and nutrient elements on the CHBr_3 fluxes characteristics might not be ignored.
Characteristics of methenyl bromide(CHBr_3) fluxes from tidal wetlands of the Jiaozhou Bay were observed using static flux chambers methods during 2016/2017, and the key factors affecting CHBr_3 fluxes were discussed. The results showed that CHBr_3 average fluxes from S. alterniflora marsh and bare flat marsh were 10.92 nmol/(m2?d) and 8.96 nmol/(m~2?d), respectively, indicating that the tidal marsh ecosystems in the Jiaozhou Bay acted as CHBr_3 source. It indicates that S. alterniflora marshes could promote CHBr_3 emissions to some extent. The emission fluxes of CHBr_3 between different tidal marshes was distinctly different. The higher CHBr_3 emissions from the S. alterniflora marshes were occurred in summer and autumn were probably related to the effects of temperature and vegetation biomass. The higher fluxes of CHBr_3 in bare flat during early spring and winter may be related to the freeze-thaw cycle. The change of environmental factors in the tidal flat marsh of Jiaozhou Bay was complex, and the emission fluxes of CHBr_3 were affected by many factors. The dominant factor affected the CHBr_3 emission in S. alterniflora marsh of Jiaozhou Bay was temperature, while the influences of vegetation growth status and water and salinity condition and nutrient elements on the CHBr_3 fluxes characteristics might not be ignored.
引文
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[26]杨斌,陆小兰,杨桂朋,等.北黄海海水中挥发性卤代烃的分布和海-气通量研究[J].海洋学报,2010,32(1):47-55.
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[28]柳秋林.渤海和北黄海中四种挥发性卤代烃的分布与通量研究[D].中国海洋大学,2015.
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[30]郝庆菊,王跃思,江长胜,等.湿地甲烷排放研究若干问题的探讨[J].生态学杂志,2005,24(2):170-175.
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[33]李洪远,王芳,熊善高,等.植物挥发性有机物的作用与释放影响因素研究进展[J].安全与环境学报,2015,15(2):292-296.
[34]Rhew R C,Miller B R,Bill M,et al.Environmental and biological controls on methyl halide emissions from southern California coastal salt marshes[J].Biogeochemistry,2002,60(2):141-161.
[35]Khalil M A K,Moore R M,Harper D B,et al.Natural emissions of chlorine‐containing gases:Reactive Chlorine Emissions Inventory[J].Journal of Geophysical Research Atmospheres,1999,104(D7):8333-8346.
[36]Redeker K R,Wang N,Low J C,et al.Emissions of methyl halides and methane from rice paddies.[J].Science,2000,290(5493):966-969.
[37]Song C,Wang Y,Wang Y,et al.Emission of CO2,CH4,and N2O from freshwater marsh during freeze–thaw period in Northeast of China[J].Journal of Environmental Management,2008,40(35):428-436.
[38]Teepe R,Brumme R,Beese F.Nitrous oxide emissions from soil during freezing and thawing periods[J].Soil Biology&Biochemistry,2001,33(9):1269-1275.
[39]Xu H X,Wu H Y,Qiu Y P,et al.Degradation of fluoranthene by a newly isolated strain of Herbaspirillum chlorophenolicum from activated sludge[J].Biodegradation,2011,22(2):335-345.
[40]Wichern J,Wichern F,Joergensen R G.Impact of salinity on soil microbial communities and the decomposition of maize in acidic soils[J].Geoderma,2006,137(1/2):100-108.
[41]Hirota M,Senga Y,Seike Y,et al.Fluxes of carbon dioxide,methane and nitrous oxide in two contrastive fringing zones of coastal lagoon,Lake Nakaumi,Japan[J].Chemosphere,2007,68(3):597-603.
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