Response of soil microbial community to climate change

土壌微生物相の気候変化に対する応答

近藤 俊明*; 寺本 宗正*; 中根 周歩*; 高木 健太郎*; 小嵐 淳   ; 安藤 麻里子  ; 高木 正博*; 石田 祐宣*; Liang, N.*

Kondo, Toshiaki*; Teramoto, Munemasa*; Nakane, Kaneyuki*; Takagi, Kentaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Takagi, Masahiro*; Ishida, Sachinobu*; Liang, N.*

The carbon stored belowground is transferred to the atmosphere by microbial decomposition of soil organic carbon. This phenomenon is called as soil respiration, and the global soil respiration is estimated at 98 12 GtC, which is far more than that released by annual fossil-fuel CO emissions. Because the amount of soil respiration increases with a rise in temperature mainly due to accelerated microbial decomposition of soil organic carbon, several simulations suggested that global warming-induced increases in soil respiration represent an important positive feedback loop to climate change. On the other hand, the deceleration of soil respiration under warming condition, i.e. negative feedback, was observed in some field experiments. Thus, the magnitude and timing of this feedback still remain unclear, because of the difficulty in measuring the response of diverse and huge soil microbiota to global warming. In this presentation, we measure the amount and species composition of soil microbiota in five soil warming experiment sites throughout Japan by using the Next Generation Sequencing, and discuss the response of soil microbiota to global warming.