Our organization, departments, staff and researchers
Yuya Tada
The research group I work for : Nature Environment Group
My research relates mainly to the process of methylation of mercury by marine microorganisms, as well as how methylmercury gets into and accumulates in plankton.
Research theme - Areas of work
Study of microbial functional genes involved in mercury methylation and demethylation in the ocean
Uptake and accumulation of methylmercury by marine phytoplankton
Main research achievements
Original articles (peer-reviewed)
2023
Y. Tada, K. Marumoto, Y. Iwamoto, K. Takeda, H. Sakugawa [Distribution and phylogeny of mercury methylation, demethylation, and reduction genes in the Seto Inland Sea of Japan], Marine Pollution Bulletin, 186, 114381 (2023)
E. Capo, B. Peterson, M. Kim, D. Jones, S. G. Acinas, M. Amyot, S. Bertilsson, E. Bjorn, M. Buck, C Cosio, D. A. Elias, C. Gilmour, M. Goñi- Urriza, B. Gu, H. Lin, Y. R. Liu, K. McMahon, J. W. Moreau, J. Pinhassi, F. Puente- Sánchez, P. Sánchez, V. Storck, Y. Tada, A. Vigneron, D. A. Walsh, M. Vandewalle-Capo, A. G. Bravo, C. Gionfriddo [A consensus protocol for the recovery of mercury methylation genes from metagenomes], Molecular Ecology Resources, 23, 190-204 (2023)
2021
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).
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)
2020
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).
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).
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).
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).
Y. Tada, K. Marumoto [Uptake of methylmercury by marine microalgae and its bioaccumulation in them], Journal of Oceanography, vol 76: p63-70 (2020).
2018
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)
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)
2017
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)
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)
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)
2016
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)
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)
2015
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)
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)
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)
2014
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)
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)
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)
2013
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)
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)
2012
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)
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)
2011
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)
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)
2010
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)
2009
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)
2007
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)
Authored (co-authored) books
Tada Y: Microbe production, Reference Book on the Environment and Microorganisms, Asakura Publishing. Japanese Society of Microbial Ecology, ed., co-authored, pp. 22-23, 2014.
Externally-funded research
FY2022-2024 JSPS Grant-in-Aid for Scientific Research (C) (Principal Investigator)
Study on methylmercury accumulation process in marine phytoplankton community
FY2020-2022 Environment Research and Technology Development Fund from the Ministry of the Environment. Grant Number: S II-6-3(2) (Co-Investigator)
Research on distribution and allocation by form of mercury in the oceanic environment
FY2017-2019 JSPS Grant-in-Aid for Scientific Research (C) (Principal Investigator)
Study on microbial community involved in the refractory dissolved organic matter dynamics in the ocean
FY2017-2018 Environment Research and Technology Development Fund from the Ministry of the Environment. Grant Number: 5-1702 (Co-Investigator)
Comprehension and modelling of bioaccumulation dynamics of inorganic mercury methylation reactions and mercury compounds in the ocean
FY2015-2016 JSPS Grant-in-Aid for Early-Career Scientists (B) (Principal Investigator)
Dynamics of microbial carbon pump; analysis of refractory dissolved organic matter production from particulate organic matter
FY2014-2016 Grant-in-Aid for JSPS Research Fellows (PD)
FY2007-2009 Grant-in-Aid for JSPS Research Fellows (DC2)
Main career history, academic history, academic degrees, awards, etc.
Academic history
March 2004B.S., Department of Applied Biological Science, School of Applied Biological Science, Hiroshima University
March 2006M.S., Department of Environmental Dynamics and Management, Graduate School of Biosphere Science, Hiroshima University
March 2010Ph. D. in Agriculture, Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
Career history
2020Senior Researcher, Department of Environment and Public Health, National Institute for Minamata Disease
2018Postdoctoral Researcher, Department of Environment and Public Health, National Institute for Minamata Disease
2016Project Scientist, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2013JSPS Research Fellow PD, Faculty of Environmental Earth Science, Hokkaido University
2012Project Researcher, Marine Biogeochemistry Group, Atmosphere and Ocean Research Institute, The University of Tokyo
2011Post-doctoral fellow, Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB)
2010Project Researcher, Microbial Oceanography Group, Atmosphere and Ocean Research Institute, The University of Tokyo
2007JSPS Research Fellow DC2, The University of Tokyo
