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Influence of degradation of the swamp and alpine meadows on CH4 and CO2 fluxes on the Qinghai-Tibetan Plateau. |
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Abstract In the Fenghuoshan region on the Qinghai-Tibetan Plateau, the CH4 and CO2 fluxes and the corresponding environmental factors of the swamp and alpine meadows with different degradation degrees were determined for one year. The swamp meadows with different degradation degrees all showed the characteristics of CH4 and CO2 emitting and the emission intensities reduced with the degradation degrees increased; the different degraded alpine meadows showed the characteristics of CO2 emitting but CH4 being absorbed and all the fluxes increased with the degradation degrees pricked up. In the future climate conditions, degradations of the swamp and alpine meadows on the Qinghai-Tibetan Plateau would play a promotion role during the regional warming. Air temperature, soil temperature and moisture at the 5cm depth and biomass were the major environmental factors influencing the CH4 and CO2 fluxes.
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Received: 18 September 2008
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