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Ethylene rather than dissolved organic carbon controls methane uptake in upland soils
Author(s) -
Zhou Xiaoqi,
Dong Haibo,
Chen Chengrong,
Smaill Simeon J.,
Clinton Peter W.
Publication year - 2014
Publication title -
global change biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.146
H-Index - 255
eISSN - 1365-2486
pISSN - 1354-1013
DOI - 10.1111/gcb.12487
Subject(s) - environmental chemistry , methane , soil water , dissolved organic carbon , anaerobic oxidation of methane , methanotroph , chemistry , environmental science , soil science , organic chemistry
Sullivan et al. (2013) reported that there was a significantly positive relationship (P < 0.01, r2 = 0.58) between dissolved organic carbon (DOC) using salt extraction methods and potential methane oxidation rates in an arid region across a substrate age gradient. The authors observed that during the wet season rates of methane oxidation were higher, in opposition to trends in other ecosystems where increased soil moisture limits methane oxidation. Furthermore, DOC was more closely correlated with potential methane oxidation rates than other relevant parameters such as soil moisture content, pore space and texture. After considering alternative options, the authors indicated that DOC may be an important regulator of methane oxidation rates in these arid soils. The authors indicated that this conclusion was supported by observations that incubation with 13C-glucose enriched the methaneoxidizing bacteria (MOB) biomarker 18:1x7c, suggesting that DOC was a facultative substrate for MOB, and also explaining the observed correlation.Griffith Sciences, Griffith School of EnvironmentNo Full Tex