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Winter methane emission from an alpine open fen on Tibetan Plateau

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Języki publikacji
EN
Abstrakty
EN
Methane (CH4) emission was measured from an open fen on the Zoige Plateau (3500 m a.s.l.) (the eastern edge of the QinghaiTibetan Plateau) during two winters of 2006 and 2007. Three dominant plant stands, including Carex muliensis Hand-Mazz. (CM), Eleocharis valleculosa Ohwif. setosa (Ohwi) Kitagawa.(EV) and Kobresia tibetica Maxim (KT) were chosen to be monitored. Winter CH4 emissions were roughly estimated to be 0.94 mg CH4 m[^-2] h[^-1]. High spatialtemporal variations of the emission were found in this fen (the sequence of CM> EV> KT; 0.63 and 1.24 mg CH4 m[^-2] h[^-1] for 2006 and 2007, respectively). Factors involved in the spatial-temporal variation were: 1) water table in summer determining the winter amount of "old" CH4 stored in peat; 2) ice layer determining the release of CH4; 3) plant growth determining both the quantity of CH4 stored in peat and available substrates for CH4 production in winter. However, due to the homogeneity of freezing in winters, predictive factors such as plant growth and water table in summer could contribute more to winter CH4 emission than in situ freezing conditions. Considering that plant growth and water table are also the key factors controlling the spatial-temporal variation of CH4 emission in summer, we therefore suggested that winter CH4 emission represents the "inertia" of summer CH4 emission.
Rocznik
Strony
87--94
Opis fizyczny
Bibliogr. 31 poz.,Rys., tab.,
Twórcy
autor
autor
autor
autor
autor
  • Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China ; Graduate School, Chinese Academy of Sciences, Beijing 100049, China ; Key Laboratory of Mountain Ecological Restoration and Bio-resources Utilization, Chinese Academy of S, wuning@cib.ac.cn
Bibliografia
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  • 16. Larmola T., Alm J., Juutinen S., Huttunen J. T., Martikainen P. J., Silvola J. 2004 – Contribution of vegetated littoral zone to winter fluxes of carbon dioxide and methane from boreal lakes – J. Geophys. Res. 109, doi 10.1029/2004jd004875.
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  • 28. Wu N. 1997 – Indigenous knowledge and sustainable approaches for the maintenance of biodiversity in nomadic society: Experiences from the eastern Tibetan Plateau – Erde, 128: 67–80.
  • 29. Xu B.Q., Yao T.D. 2001 – Dasuopu ice core record of atmospheric methane over the past 2000 years – Sci. in Chinese Ser. D, 44: 689–695.
  • 30. Yao T. D., Thompson L. G., Duan K. Q., Xu B. Q., Wang N. L., Pu J. C., Tian L. D., Sun W. Z., Kang S. C., Qin X. A. 2002 - Temperature and methane records over the last 2 ka in Dasuopu ice core – Sci. in Chinese Ser. D, 45: 1068–1074.
  • 31. Zhang G. S., Tian J. Q., Jiang N., Guo X. P., Wang Y.F., Dong X. Z. 2008 – Methanogen community in Zoige wetland of Tibetan plateau and phenotypic characterization of a dominant uncultured methanogen cluster ZC-I – Environ. Microbiol. 10: 1850–1860.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-3205-2425
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