Effects of forest cutting on greenhouse gas emissions from Larix gmelini-Sphagnum swamps in Lesser Xing' an Mountains of Heilongjiang, China

By using static chamber and gas chromatography methods, this paper studied the effects of clear cutting and selective cutting on the CO2, CH4, and N2O emissions from Larix gmelini-Sphagnum swamp in Lesser Xing' an Mountains. Dramatic changes in the seasonal dynamics of CH4 and N2O emissions wer...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 21; no. 2; p. 287
Main Authors Mu, Chang-Cheng, Wu, Yun-Xia, Li, Wan-Shu, Xu, Rui
Format Journal Article
LanguageChinese
Published China 01.02.2010
Subjects
Carbon Dioxide - analysis
Carbon Dioxide - metabolism
China
Ecosystem
Environmental Monitoring
Forestry - methods
Greenhouse Effect
Larix - growth & development
Larix - metabolism
Methane - chemistry
Methane - metabolism
Nitrous Oxide - analysis
Nitrous Oxide - metabolism
Seasons
Wetlands
China
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Summary:By using static chamber and gas chromatography methods, this paper studied the effects of clear cutting and selective cutting on the CO2, CH4, and N2O emissions from Larix gmelini-Sphagnum swamp in Lesser Xing' an Mountains. Dramatic changes in the seasonal dynamics of CH4 and N2O emissions were detected in different treatment sites. Control site absorbed CH4 in summer and emitted CH4 in autumn, and absorbed N2O in both summer and autumn; selective cutting site emitted CH4 and N2O mainly in summer; and clear cutting site emitted CH4 in summer and autumn, and absorbed N2O in summer but emitted it in autumn. Cutting pattern had less effects on the seasonal dynamics of CO2 emission. Both on the clear cutting site and on the selective cutting site, the CO2 emission was in order of summer > spring > autumn. Forest cutting altered the source and sink functions of the sites. Control site functioned as a source of CO2 and a weak sink of CH4 or N2O, while forest cutting sites had a decrease of CO2 emission by 25%, and
ISSN:1001-9332