globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-015-0142-z
Scopus记录号: 2-s2.0-84948117441
论文题名:
Soil incubations reproduce field methane dynamics in a subarctic wetland
作者: Hodgkins S.B.; Chanton J.P.; Langford L.C.; McCalley C.K.; Saleska S.R.; Rich V.I.; Crill P.M.; Cooper W.T.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 126, 期:2018-01-02
起始页码: 241
结束页码: 249
语种: 英语
英文关键词: Geochemistry ; Methane ; Peatlands ; Soil incubations ; Stable isotopes
Scopus关键词: biogeochemistry ; carbon cycle ; carbon dioxide ; concentration (composition) ; methane ; numerical model ; solubilization ; stable isotope ; subarctic region ; wetland
英文摘要: A major challenge in peatland carbon cycle modeling is the estimation of subsurface methane (CH4) and carbon dioxide (CO2) production and consumption rates and pathways. The most common methods for modeling these processes are soil incubations and stable isotope modeling, both of which may involve departures from field conditions. To explore the impacts of these departures, we measured CH4/CO2 concentration ratios and 13C fractionation factors (αC, indicating CH4 production pathways) in field pore water from a thawing subarctic peatland, and compared these values to those observed in incubations of corresponding peat samples. Incubation CH4/CO2 production ratios were significantly and positively correlated with observed field CH4/CO2 concentration ratios, though observed field ratios were ~20 % of those in incubations due to CH4’s lower solubility in pore water. After correcting the field ratios for CH4 loss with an isotope mass balance model, the incubation CH4/CO2 ratios and αC were both significantly positively correlated with field ratios and αC (respectively), both with slopes indistinguishable from 1. Although CH4/CO2 ratios and αC were slightly higher in the incubations, these shifts were consistent along the thaw progression, indicating that ex situ incubations can replicate trends in in situ CH4 production. © 2015, Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83460
Appears in Collections:气候减缓与适应
气候变化事实与影响

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作者单位: Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, United States; Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY, United States; Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ, United States; Department of Geological Sciences, Stockholm University, Stockholm, Sweden; Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, United States

Recommended Citation:
Hodgkins S.B.,Chanton J.P.,Langford L.C.,et al. Soil incubations reproduce field methane dynamics in a subarctic wetland[J]. Biogeochemistry,2015-01-01,126(2018-01-02)
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