日本地球惑星科学連合2023年大会

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[J] 口頭発表

セッション記号 A (大気水圏科学) » A-CG 大気海洋・環境科学複合領域・一般

[A-CG45] 海洋表層-大気間の生物地球化学

2023年5月21日(日) 09:00 〜 10:30 102 (幕張メッセ国際会議場)

コンビーナ:亀山 宗彦(北海道大学)、岩本 洋子(広島大学大学院統合生命科学研究科)、野口 真希(国立研究開発法人海洋研究開発機構 地球表層システム研究センター)、小杉 如央(気象研究所)、座長:小杉 如央(気象研究所)、野口 真希(国立研究開発法人海洋研究開発機構 地球表層システム研究センター)

10:00 〜 10:15

[ACG45-05] Light irradiation on bacterial-derived dissolved organic matter as a source of low molecular weight organic compound: A laboratory study

*Royston Uning1Yuko Omori2、Shigeki Wada3Hiroshi Tanimoto1 (1.Earth System Division, National Institute for Environmental Studies, Japan、2.Faculty of Life and Environmental Sciences, University of Tsukuba, Japan、3.Shimoda Marine Research Center, University of Tsukuba, Japan)

Marine bacteria produce and metabolize low molecular weight (LMW) organic compounds. In contrast to the commonly known direct production of LMW organic compounds by marine bacteria, the indirect production process information remains limited. Therefore, this study aims to elucidate the potential formation of LMW organic compounds from bacterial-derived dissolved organic matter (DOM). Through a series of laboratory experiments using natural marine bacteria to produce bacterially derived DOM and underwent light irradiation treatment, we observed a directly proportional relationship between the bacterial-derived DOM reduction and the LMW organic compound production. The outcome of this study may suggest bacterial-derived DOM as one of the important substrates for the formation of LMW organic compounds in the natural marine environment.