Permafrost thawing and novel mechanism of CO2 emission by microbe under warming Arctic

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05117
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: uchida masao 国立研究開発法人国立環境研究所, 環境計測研究センター, 主任研究員 (50344289)
• Co-Investigator(Kenkyū-buntansha): 熊田 英峰 東京薬科大学, 生命科学部, 講師 (60318194) ; 内海 真生 筑波大学, 生命環境系, 准教授 (60323250)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 北極 / 永久凍土 / ニーオルスン / スピッツベルゲン島 / 放射性炭素 / 微生物 / 細胞膜脂質 / 氷河

Outline of Final Research Achievements

High latitude region including the Arctic has largest reservoir of soil organic carbon (SOC) in the Earth. Since the high latitude region would be significantly influenced with environmental change under global warming, fragile of soil carbon reservoir should be investigated. Thus we investigated here the carbon source of soil respiration to evaluate fragile characteristics of the SOC using natural level radiocarbon as a novel sensor of fragile soil organic matter under future global warming. Here Arctic soil were collected in a successional glacier foreland in Ny-Alesund, Svarvard islands, Norway. Microbial phospholipids fatty acids (PLFAs) were extracted from soils for compound-specific radiocarbon analysis. in the geological time scale. We discussed their results in the light of soil carbon dynamics under climate instability in the Arctic region.

Free Research Field

生物地球化学