| 要旨トップ | 目次 | 日本生態学会第62回全国大会 (2015年3月、鹿児島) 講演要旨
ESJ62 Abstract


一般講演(口頭発表) B1-13 (Oral presentation)

High risk of permafrost thaw

*Xin WANG1 , Masayuki YOKOZAWA2, Hazuki ARAKIDA3, Kensuke MORI4, Takeshi ISE5, Miyuki KONDO6, Masao UCHIDA6,Keiji KUSHIDA7,Motomu TODA1 1 Hiroshima University, 2 Shizuoka University, 3 Riken Kobe Branch, Kobe,4 University of Calgary, 5 Kyoto University ,6 National Institute for Environmental Studies, 7 Nihon University

A large amount of soil organic carbon (SOC) is stored in high-latitude boreal permafrost regions, accounting for twice as much as is in the atmosphere at present. In the region, climate warming has often caused disturbances that may accelerate the rate of permafrost thaw and change SOC dynamics in both organic and mineral soils. In this study, we used a soil carbon dynamics model named Physical and Biogeochemical Soil Dynamics Model to examine how climate-induced disturbances could change SOC pools in the boreal forest and tundra terrestrial ecosystems in Alaska, especially focusing on the effect of fire disturbances on the permafrost soil layers. The results showed that the fire disturbance would reduce SOC stores substantially associated with the fire-induced thawing of permafrost. It is suggested that the vulnerability of the SOC stocks in the boreal region as affected by future warming is closely linked to the sensitivity of permafrost to wildfire disturbance.


日本生態学会