Research on carbon cycling of seawater DOC using CSRA of Archaea lipids

2016 Fiscal Year Final Research Report

• Project/Area Number: 26281015
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• 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, 生命環境科学研究科(系), 准教授 (60323250)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 古細菌 / 太平洋 / 駿河湾 / バイオマーカー / 放射性炭素 / 現場培養 / 増殖速度 / DOC

Outline of Final Research Achievements

We measured leucine incorporation rates using in situ incubation apparatus in Suruga Bay. Compound specific radiocarbon analysis of arcana lipids to elucidate relative contribution of chemoautotrophic archaea in open ocean. As a results, the organic carbon production rate by the chemoautotrophic archaea in Suruga Bay was 1.5-4.6 Gt C/yr, which was 3.0-9.2% of 0.36 Gt C/yr of primary production of reported values of Pacific Ocean. In 400 m water column in Suruga Bay, it was estimated that half of percent of archaea could be chemoautotrophy from measured values of incorporation rate and radiocarbon data.

Free Research Field

生物地球化学