トップ　＞　組織の案内　＞　環境・保健研究部
多田　雄哉（ただ　ゆうや）
環境・保健研究部　環境化学研究室　主任研究員
主に、海洋微生物による水銀のメチル化過程に関する研究、メチル水銀のプランクトンへの取込み・蓄積過程に関する研究を行っています。
研究内容
    ・海洋における水銀のメチル化及び脱メチル化過程に関与する微生物群の動態解明

    ・海洋植物プランクトンによるメチル水銀の取込み及び蓄積機構の解明
所属している研究グループ 
    自然環境グループ
主な研究論文・著書；
原著論文（査読有）
  1. Y. Tada, K. Marumoto, A. Takeuchi [Nitrospina-like Bacteria Are Dominant Potential Mercury Methylators in Both the Oyashio and Kuroshio Regions of the Western North Pacific], Microbiology Spectrum, 9(2), e00833-21 (2021).
  2. M. Nagano, M. Fujimura, Y. Tada, Y. Seko [Dietary Fructooligosaccharides Reduce Mercury Levels in the Brain of Mice Exposed to Methylmercury], Biological and Pharmaceutical Bulletin, 44(4), 522-527 (2021)
  3. S. Goto, Y. Tada, K. Suzuki, Y. Yamashita [Evaluation of the production of dissolved organic matter by three marine bacterial strains], Frontiers in Microbiology, 11, 2553 (2020).
  4. Y. Cui, S. K. Wong, R. Kaneko, A. Mouri, Y. Tada, I. Nagao, S. J. Chun, H.G. Lee, C. Y. Ahn, H. M. Oh, Y. Sato-Takabe, K. Suzuki, H. Fukuda, T. Nagata, K. Kogure, K. Hamasaki [Distribution of dimethylsulfoniopropionate degradation genes reflects strong water current dependencies in the Sanriku coastal region in Japan: from mesocosm to field study], Frontiers in Microbiology, 11, 1372 (2020).
  5. Y. Tada, K. Marumoto, A. Takeuchi [Nitrospina-Like Bacteria are Potential Mercury Methylators in the Mesopelagic Zone in the East China Sea], Frontiers in Microbiology, vol. 11, 1369 (2020).
  6. T. Shiozaki, Y. Tada, H. Fukuda, K. Furuya, T. Nagata [Primary production and nitrogen assimilation rates from bay to offshore waters in the oyashio-kuroshio-Tsugaru Warm Current interfrontal region of the northwestern north Pacific Ocean] Deep Sea Research Part I: Oceanographic Research Papers, 103304 (2020).
  7. Y. Tada, K. Marumoto [Uptake of methylmercury by marine microalgae and its bioaccumulation in them], Journal of Oceanography, vol 76: p63-70 (2020).
  8. Y. Mizuno,　J. Nishioka, T. Tanaka, Y. Tada, K. Suzuki, Y. Tsuzuki, A. Sugimoto, Y. Yamashita [Determination of the freshwater origin of Coastal Oyashio Water using humic-like fluorescence in dissolved organic matter], Journal of Oceanography, Springer, vol. 74: p509-521 (2018)
  9. I. Nagao, Y. J. Eum, Y. Iwamoto, Y. Tada, K. Suzuki, A. Tsuda, M. Toratani, K. Hamasaki, M. Uematsu [Biogenic sulfur compounds in spring phytoplankton bloom in the western North Pacific off the coast of northern Japan], Progress in Oceanography, Elsevier, vol. 165: p145-157 (2018)
  10. Y. Tada, R. Nakaya, S. Goto, Y. Yamashita and K. Suzuki [Distinct bacterial community and diversity shifts after phytoplankton-derived dissolved organic matter addition in a coastal environment], Journal of Experimental Marine Biology and Ecology, Elsevier, vol. 495:p119-128 (2017)
  11. S. Goto, Y. Tada, K. Suzuki and Y. Yamashita [Production and reutilization of fluorescent dissolved organic matter by a marine bacterial strain, Alteromonas macleodii], Frontiers in Microbiology, vol. 8:507 (2017)
  12. Y. Tada, T. Shiozaki, H. Ogawa and K. Suzuki [Basin-scale distribution of prokaryotic phylotypes in the epipelagic layer of the Central South Pacific Ocean during austral summer], Journal of Oceanography, Springer, vol. 73:p145-158 (2017)
  13. Y. Tada and K. Suzuki [Changes in the community structure of free-living heterotrophic bacteria in the open tropical Pacific Ocean in response to microalgal lysate-derived dissolved organic matter], FEMS Microbiology and Ecology, Oxford, fiw099 (2016)
  14. Y. Yamada, H. Fukuda, Y. Tada, K. Kogure and T. Nagata [Bacterial enhancement of gel particle coagulation in seawater], Aquatic Microbial Ecology, Inter-Research, vol. 77:p11-22 (2016)
  15. K. Tsuchiya, VS. Kuwahara, K. Hamasaki, Y. Tada, T. Ichikawa, T. Yoshiki, R. Nakajima, A. Imai, S. Shimode and T. Toda [Typhoon-induced response of phytoplankton and bacteria in temperate coastal waters], Estuarine, Coastal and Shelf Science, Elsevier, vol. 167:p458-465 (2015)
  16. K. Hamasaki, A. Taniguchi, Y. Tada, R. Kaneko and T. Miki [Active populations of rare microbes in oceanic environments as revealed by bromodeoxyuridine incorporation and 454 tag sequencing], GENE, Elsevier, vol. 576:p650-656 (2015)
  17. K. Tsuchiya, T. Sano, N. Kawasaki, H. Fukuda, N. Tomioka, K. Hamasaki,Y. Tada, S. Shimode, T. Toda and A. Imai [New radioisotope-free method for measuring bacterial production using [15N5]-2’-deoxyadenosine and liquid chromatography mass spectrometry (LC–MS) in aquatic environments], Journal of Oceanography, Springer, vol. 71:p675-683 (2015)
  18. Y. Sato-Takabe, S. Suzuki, R. Shishikura, K. Hamasaki,Y. Tada, T. Kataoka, T. Yokokawa, N, Yoshie and S. Suzuki [Spatial distribution and cell size of aerobic anoxygenic phototrophic bacteria in the Uwa Sea, Japan], Journal of Oceanography, Springer, vol. 71: p151-159 (2014)
  19. Y. Tada and H-P. Grossart [Community shifts of actively growing lake bacteria after N-acetyl-glucosamine addition: improving the BrdU-FACS method], ISME Journal, Nature Publishing Group, vol. 8: p441-454 (2014)
  20. N. Kawasaki, K. Komatsu, A. Kohzu, N. Tomioka, R. Shinohara, T. Satou, F. Watanabe, Y. Tada, K. Hamasaki, M. R. M. Kushairi and A. Imai [Bacterial contribution to dissolved organic matter in eutrophic Lake Kasumigaura, Japan], Applied and Environmental Microbiology, American Society for Microbiology, vol. 79: p 7160-7168 (2014)
  21. R. Nakajima, K. Tsuchiya, N. Nakatomi, T. Yoshida, Y. Tada, F. Konno, T. Toda, V. S. Kuwahara, K. Hamasaki, B. H. R. Othaman, T. C. Segaran and A. W. M. Effendy [Enrichment of microbial abundance in the sea-surface microlayer over a coral reef: implications for biogeochemical cycles in reef ecosystems], Marine Ecology Progress Series, Inter-Research, vol. 490: p11-22 (2013)
  22. Y. Tada, R. Makabe, N. Kasamatsu-Takazawa, A. Taniguchi and K. Hamasaki [Growth and distribution patterns of Roseobacter/Rhodobacter, SAR11, and Bacteroidetes lineages in the Southern Ocean], Polar Biology, Springer, vol. 36: p691-704 (2013)
  23. Y. Tada, A. Taniguchi, Y. Sato-Takabe and K. Hamasaki [Growth and succession patterns of major phylogenetic groups of marine bacteria during a mesocosm diatom bloom], Journal of Oceanography, Springer, vol. 68: p509-519 (2012)
  24. M. Fujinoki, T. Koito, Y. Fujiwara, M. Kawato, Y. Tada, K. Hamasaki, M. Jimbo and K. Inoue [Whole-mount fluorescence in situ hybridization to visualize symbiotic bacteria in the gills of deep sea mussels], Aquatic Biology, Inter-Research, vol. 14: p135-140 (2012)
  25. Y. Tada, A. Taniguchi, I. Nagao, T. Miki, M. Uematsu, A. Tsuda and K. Hamasaki [Differing growth responses of major phylogenetic groups of marine bacteria to natural phytoplankton blooms in the western North Pacific], Applied and Environmental Microbiology, American Society for Microbiology, vol. 77: p4055-4065 (2011)
  26. A. Taniguchi, Y. Tada and K. Hamasaki [Seasonal Variations in the Community Structure of Actively Growing Bacteria in Neritic Waters of Hiroshima Bay, Western Japan], Microbes & Environments, Japanese Society of Microbial Ecology and the Japanese Society of Soil Microbiology, vol. 26: p339-346 (2011)
  27. Y. Tada, A. Taniguchi and K. Hamasaki [Phylotype-specific growth rates of marine bacteria measured by bromodeoxyuridine immunocytochemistry and fluorescence in situ hybridization], Aquatic Microbial Ecology, Inter-Research, vol. 59: p229-238 (2010)
  28. Y. Tada, A. Taniguchi and K. Hamasaki [Phylotype-specific productivity of marine bacterial populations in eutrophic seawater, as revealed by bromodeoxyuridine immunocytochemistry combined with fluorescence in situ hybridization], Microbs & Environments, Japanese Society of Microbial Ecology and the Japanese Society of Soil Microbiology, vol. 24: p315-321 (2009)
  29. K. Hamasaki, A. Taniguchi, Y. Tada, R. A. Long and F. Azam [Actively growing bacteria in the Inland Sea of Japan, identified by combined bromodeoxyuridine immunocapture and denaturing gradient gel electrophoresis], Applied and Environmental Microbiology, American Society for Microbiology, vol. 73: p2787-2798 (2007)

    著書（分担執筆）
    多田　雄哉　「細菌生産」、『環境と微生物の事典』、朝倉書店　日本微生物生態学会編集　分担執筆p22-23, 2014
外部資金による研究
・令和2-4年度　環境総合研究推進費　課題番号: SⅡ-6-3(2) (分担)「海洋環境での形態別水銀の分布と分配に関する研究」
・平成29-31年度　科学研究費補助金　基盤研究 (C) 課題番号: 17K07896 (代表)「海洋における難分解性溶存有機物の動態を左右する微生物系統群の解明」
・平成29-30年度　環境総合研究推進費　課題番号:5-1702 (分担)「海洋における無機水銀のメチル化反応と水銀化合物の生物蓄積動態の把握及びモデル化」
・平成27-28年度　科学研究費補助金　若手研究(B) 課題番号: 26740001 (代表)「海洋における粒子態有機物を起源とする微生物炭素ポンプ機能の解明」
・平成26-28年度　日本学術振興会特別研究員奨励費PD　課題番号: 13J04633
・平成19-21年度　日本学術振興会特別研究員奨励費DC2　課題番号: 07J02357
主な履歴、学歴、学位、表彰等
学歴
平成16年3月　広島大学　生物生産学部　生物生産学科（卒業）
平成18年3月　広島大学　大学院生物圏科学研究科　環境循環系制御学専攻（修了）
平成22年3月　東京大学　大学院農学生命科学研究科　水圏生物科学専攻（修了）（博士　農学）

職歴
平成19年4月　東京大学　日本学術振興会特別研究員DC2
平成22年4月　東京大学大気海洋研究所　微生物分野　特任研究員
平成23年10月　Leibniz-Institute of Freshwater Ecology and Inland Fisheries (Germany)、ポスドク
平成24年4月　東京大学大気海洋研究所　生元素動態分野　特任研究員
平成25年4月　北海道大学　日本学術振興会特別研究員-PD
平成28年4月　国立研究開発法人　海洋研究開発機構　特任研究員
平成30年4月　国立水俣病総合研究センター　環境・保健研究部　特別研究員
令和2年4月　　国立水俣病総合研究センター　環境・保健研究部　主任研究員