The fluxes of methane (CH4), dimethyl sulfide (DMS) and carbon disulfide (CS2)) were seasonally measured using static flux chambers over an annual cycle along an elevational gradient of a eastern Chinese coastal salt marsh. To estimate the contribution of higher plants to the fluxes, plant aboveground biomass was experimentally removed and the flux differences between the treatment and the intact were examined. The salt marsh generally functioned as a source for CH4, DMS and CS2, with the maximum occurring at the cordgrass (Spartina alterniflora) marsh. CH4 emission rates were positively correlated to those of DMS and CS2, indicating a possible coupling between sulphur and carbon cycles in the study marsh. Comparative analyses showed that higher plants were present as an important source of CH4, DMS and CS2. However, the mechanism underlying plant emissions is not clear. CH4, DMS and CS2 emission rates were positively correlated to soil organic matter content and total nitrogen content, suggesting that the observed overall net emissions of CH4, DMS and CS2 might result from the enriched soil organic matter, which feed soil microorganisms using organic matter as a source for both carbon and energy.
WANG Jin-xin, SUN Shu-cun, WANG Jin-shu, ZHONG Chong-qing, XING Wei
. Characteristics of DMS, CS2 and CH4 Fluxes along an Elevational Gradient of a Coastal Salt Marsh, East China[J]. SCIENTIA GEOGRAPHICA SINICA, 2009
, 29(4)
: 535
-539
.
DOI: 10.13249/j.cnki.sgs.2009.04.535
[1] 李子刚.湿地生态系统碳储存和温室气体排放研究[J].地理科学,2004,24(5):634~639.
[2] 王金达,刘景双,于君宝.沼生植物过渡金属元素含量季节变化特征——以三江平原典型湿地植物为例[J].地理科学,2003,23(2):213~217.
[3] 宋长春.湿地生态系统碳循环研究进展[J].地理科学,2003,23(5):622~628.
[4] 欧维新,杨桂山,李恒鹏,等.苏北盐城海岸带景观格局时空变化及驱动力分析[J].地理科学,2004,24(5):610~615.
[5] 高建华,杨桂山,欧维新.苏北潮滩湿地植被对沉积物N、P含量的影响[J].地理科学,2006,26(2):224~230.
[6] 于兴修,杨桂山,王 瑶.土地利用/覆被变化的环境效应研究进展与动向[J].地理科学,2004,24(5):627~633.
[7] Amouroux D, Roberts G, Rapsomanikis S, et al.Biogenic Gas (CH4, N2O, DMS) Emission to the Atmosphere from Near-shore and Shelf Waters of the North-western Black Sea. Estuarine[J]. Coast. Shelf Sci.,2002, 54(3):575-587.
[8] Zinder S H,Brock T D.Production of methane and carbon dioxide from methane thiol and dimethyl sulfide by anaerobic lake sediments[J]. Nature, 1978, (273): 226-228.
[9] Wang J X,Li R J,Guo Y Y,et al.Removal of methyl chloroform in a coastal salt marsh of eastern China[J]. Chemosphere, 2006, 65(8):1371-1380.
[10] 刘光菘.中国生态系统研究网络观测与分析标准方法——土壤理化分析与剖面描述[M].北京:中国标准出版社, 1996.
[11] Goldan P D, Kuster W C, Albritton D L,et al.The measurement of natural sulfur emission from soil and vegetation: three sites in the eastern United States revisited[J]. J. Atmos. Chem., 1987, 5(4): 439-467.
[12] Banwart W L,Bremner J M.Formation of volatile sulfur compounds by microbial decomposition of sulfur-containing amino acids in soils. Soil Biol. Bioche[J].1975,7(6):359-364.
[13] 叶 勇,卢昌义.海南岛长宁桐花树红树林土壤CH4研究[J].热带海洋学报,2001,20(4):35~42.
[14] Hines M E.Terminal Decomposition and Gaseous Sulfur Release from Tidal Wetlands (NASA-CR-193466), Final Technical Report[M].New Hampshire University,1992.
[15] Lein A Y, Ivanov M V.Interaction of carbon, sulphur, and oxygen cycles in continental and marginal seas[M].//Howarth E W. Stewart J W B. Ivanov M V (Eds). Sulphur Cycling on the Contients. England: SCOPE. John Wiley and Ltd, 1992:27-61.
[16] Ivanov M V,Lein A Yu,Reeburgh M S,et al.Interaction of sulphur and carbon cycles in marine sediments[M].//Brimblecombe P. and Lein A Yu. (Eds). Evolution of the Global Biogeochemical Sulphur Cycle. Wiley, Chichester, 1989:125-179.
[17] Gauci V,Matthews E,Dise N,et al.Sulfur pollution suppression of the wetland methane source in the 20th and 21st centuries [J]. P. Natl. Acad. Sci., 2004, 101(34):12583-12587.
[18] Luther G W,Church T M.An overview of the environmental chemistry of sulphur in wetlands systems[M]. //Howarth R W, Stewart J W B, Ivanov M V (Eds). Sulphur Cycling on the Continents. Wetlands, Terrestrial Ecosystems and Associated Water bodies.New York:John Wiley, 1992:125-144.
[19] 丁维新,蔡祖聪.沼泽甲烷排放及其主要影响因素[J].地理科学,2002,22(5):619~626.
