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Name: Takashi NAGAI, Ph. D. Date of birth: 30-Nov-1976 Nationality: Japanese Contact: Institute for Agro-Environmental Sciences, NARO Biodiversity division 3-1-3 Kannondai, Tsukuba, 305-8604, Japan E-mail: shimana7(at)gmail.com Position: Principal Researcher Research topics: Aquatic Microbial Ecology; Ecological risk assessment Key Words: Ecotoxicology, Risk Assessment, Regulatory Science, Pesticide, Metal, Algae Professional menbership: Society of Environmental Toxicology and Chemistry (SETAC), The Japanese Society of Environmental Toxicology, The Japanese Society of Limnology, Pesticide Science Society of Japan, Society of Risk Analysis Japan 
Education
1999 B.S. in Biology at University of Tsukuba
2001 M.S. in Science at University of Tsukuba 2006 Ph.D. in Science at University of Tsukuba Thesis: “Studies on Dissolved Iron and its Speciation in a Lake, and Their Effect on the Growth of Bloom-Forming Cyanobacteria” Research Positions
Apr 2001-Mar2005
NIES Assisstant Fellow, at National Institute for Environmental Studies, Apr 2005-Mar 2007 Research Fellow of the Japan Society for the Promotion of Science, at Graduate School of Life and Environmental Sciences, University of Tsukuba Apr 2007-Nov 2007 Postdoctoral Research Fellow, at National Institute for Agro-Environmental Sciences Dec 2007-Nov2012 Researcher, at National Institute for Agro-Environmental Sciences Dec 2012-Mar 2016 Senior Researcher, at National Institute for Agro-Environmental Sciences Apr 2016-Present Principal Researcher, at Institute for Agro-Environmental Sciences, NARO Apr 2006 - Mar 2007 Guest Researcher, at Research Center for Chemical Risk Management, National Institute of Advanced Industrial Science and Technology Apr 2014 - Dec 2014 Visiting Researcher, at Ghent University (Belgium), Faculty of Bioscience Engineering, Laboratory for Environmental Toxicology and Aquatic Ecology Publications
46, Yabuki Y, Ono J, Nagai T, Inao K, Tanimori S (2018)
Determining the suitability of a polar organic chemical integrated sampler (POCIS) for the detection of pesticide residue in the Ishikawa River and its tributary in Osaka, Japan Journal of Pesticide Science, 43(1), 18-23  45, Iwasaki Y, Jusup M, Shibata K, Nagai T, Kashiwada S (2017) Lower sensitivity of cyprinid fishes to three acetylcholinesterase inhibitor pesticides: an evaluation based on no effect concentrations Limnology, 19, 1-5 44, Nagai T (2017) Predicting herbicide mixture effects on multiple algal species using mixture toxicity models Environmental Toxicology and Chemistry, 36(10), 2624-2630 43, Yachi S, Nagai T, Inao K (2017) Analysis of region-specific predicted environmental concentration of paddy pesticides at 350 river flow monitoring sites (In Japanese) Journal of Pesticide Science, 42(1), 1-9 42, Nagai T (2016) Relationship between herbicide mode of action and difference in species sensitivity of aquatic primary producers (In Japanese) Japanese Journal of Environmental Toxicology, 19(2), 83-91 41, Yabuki Y, Nagai T, Inao K, Ono J, Aiko N, Ohtsuka N, Tanaka H, Tanimori S (2016) Temperature dependence on the pesticide sampling rate of polar organic chemical integrative samplers (POCIS) Bioscience, Biotechnology, and Biochemistry, 80(10), 2069-2075 40, Iwasaki N, Inao K, Nagai T (2016) Estimation of paddy rice planted area in an upstream basin -Analysis based on National Land Numerical Information and Statistics of Agriculture- (In Japanese) Theory and Applications of GIS, 24(1), 31-38 39, Nagai T, De Schamphelaere KAC (2016) The effect of binary mixtures of zinc, copper, cadmium, and nickel on the growth of the freshwater diatom Navicula pelliculosa and comparison with mixture toxicity model predictions Environmental Toxicology and Chemistry, 35(11), 2765-2773 38, Yachi S, Nagai T, Katsumata M (2016) Variation in delayed fluorescence of green algae and diatom during the exposure and a subsequent recovery period Japanese Journal of Environmental Toxicology, 19(1), 35-46 (In Japanese) 37, Yachi S, Nagai T, Inao K (2016) Development of simple method for estimating usage of paddy insecticides in each application method Journal of Pesticide Science, 41(1), 1-10 (In Japanese) 36, Nagai T (2016) Ecological effect assessment of 68 pesticides used in Japanese paddy field using species sensitivity distribution Journal of Pesticide Science, 41(1), 6-14 35, Nagai T, Taya K, Yoda I (2016) Comparative toxicity of 20 herbicides to 5 periphytic algae and the relationship with mode of action Environmental Toxicology and Chemistry, 35(2), 368-375 34, Hayasaka D, Kuwayama N, Azuma T, Ishida T, Mano H, Inoue M, Nagai T, Sanchez-Bayo F, Goka K, Sawahata T (2015) Different acute toxicity of fipronil baits on invasive Linepithema humile supercolonies and some nontarget ground arthropods Ecotoxicology, 24(6), 1221-1228 33, Nagai T, Taya K (2015) Estimation of herbicide species sensitivity distribution using single-species toxicity data and information on the mode of action Environmental Toxicology and Chemistry, 34(3), 677-68 32, Nagai T、Kamo M (2014) Comparative modeling of the effect of metal mixtures on algal growth using biotic ligand model, concentration additive, and independent action Japanese Journal of Environmental Toxicology, 17(2), 57-68 (In Japanese) 31, Nagai T (2014) Algal population growth model integrated with toxicokinetics for ecogical risk assessment under time-varying pesticide exposure. Human and Ecological Risk Assessment, 20, 641-657 30, Nagai T, Taya K, Annoh H, Ishihara S (2013) Application of a fluorometric microplate algal toxicity assays for riverine periphytic algal species. Ecotoxicology and Environmental Safety, 94, 37-44 29, Hayasaka D, Suzuki K, Nomura T, Nishiyama M, Nagai T, Sanchez-Bayo F, Goka K (2013) Comparison of acute toxicity of two neonicotinoid insecticides, imidacloprid and clothianidin, to five cladoceran species. Journal of Pesticide Science, 38(1), 44-47 28, Nagai T, Yokoyama A (2012) Comparison of ecological risks of insecticides for nursery-box application using species sensitivity distribution Journal of Pesticide Science, 37(3), 233-239 27, Nagai T, Horio T, Yokoyama A, Kamiya T, Takano H, Makino T (2012) Ecological risk assessment of on-site soil washing technique with iron(III) chloride in cadmium contaminated paddy field Ecotoxicology and Environmental Safety, 80, 84-90 26, Iwafune T, Ara T, Ishihara S, Yokoyama A, Nagai T, Horio T (2012) Investigation of concentrations of paddy herbicides and their transformation products in the Sakura River, Japan, and toxicity of the compounds to a diatom and a green alga Bulletin of Environmental Contamination and Toxicology, 88, 38-42 25, Nagai T, Ishiahara S, Yokoyama A, Iwafune T (2011) Effects of four rice paddy herbicides on algal viability and the relationship with population recovery Environmental Toxicology and Chemistry, 30(8), 1898-1905 24, Iwafune T, Yokoyama A, Nagai T, Horio T (2011) Evaluation of the risk of mixtures of paddy insecticides and their transformation products to aquatic organisms in the Sakura River, Japan Environmental Toxicology and Chemistry, 30(8), 1834-1842 23, Nagai T, Tomioka N, Kawasaki T, Imai A, Matsushige K (2011) In situ growth rate of Microcystis spp. and their growth limiting factors: An application of cellular RNA content Limnology, 12(3), 235-243 22, Nagai T, Inao K, Yokoyama A, Iwafune T, Horio T (2011) Probabilistic ecological risk assessment of eleven paddy herbicides Japanese Journal of Risk Analysis, 20(4), 279-291 (In Japanese) 21, Iwafune T, Inao K, Horio T, Iwasaki N, Yokoyama A, Nagai T (2010) Behavior of paddy pesticides and major metabolites in the Sakura River, Ibaraki, Japan Journal of Pesticide Science, 35(2), 114-123 20, Oyama Y, Matsushita B, Fukushima T, Chem J, Nagai T, Imai A (2010) Testing spectral decomposition algorithm (SDA) for different phytoplankton species by a simulation based on the tank experiments International Journal of Remote Sensing, 31(6), 1605-1623 19, Nagai T, Tsunemi Kiyotaka, Tokai Akihiro (2009) Exposure assessment of atmospheric antimony using an atmospheric dispersion model Environmental Science, 22(2), 61-72 (In Japanese) 18, Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S (2009) Sensitivity difference to insecticides of a riverine caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae), depending on the larval stages and strains Journal of Pesticide Science, 34(1), 21-26 17, Yokoyama A, Ohtsu K, Iwafune T, Nagai T, Ishihara S, Kobara Y, Horio T, Endo S (2009) A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Iwata, 1927) (Trichoptera: Hydropsychidae) Journal of Pesticide Science, 34(1), 13-20 16, Tomioka N, Nagai T, Kawasaki T, Imai A, Matsusige K, Kohata K (2008) Quantification of Microcystis in a eutrophic lake by simple DNA extraction and SYBR Green real-time PCR Microbes and Environments, 23(4), 306-312 15, Nagai T, Inao K, Horio T (2008) Probabilistic ecological risk assessment of paddy herbicide in Japanese river waters using uncertainty analysis: a case study for simetryn Journal of Pesticide Science, 33(4), 393-402 (In Japanese) 14, Nagai T, Imai A, Matsushige K, Yokoi K, Fukushima T (2008) Short-term temporal variations in iron concentration and speciation in a canal during a summer algal bloom Aquatic Sciences, 70(4), 388-396 13, Kamo M, Nagai T (2008) An application of biotic ligand model to predict the toxic effects of metal mixtures Environmental Toxicology and Chemistry, 27(7), 1479-1487 12, Nagai T, Tsunemi K, Kawamoto A (2007) Metal speciation in natural river waters: measurement by diffusive gradients in thin-films and estimation by chemical equilibrium model Japanese Journal of Limnology, 68(3), 391-401 (In Japanese) 11, Nagai T, Imai A, Matsushige K, Fukushima T (2007) Growth characteristics and growth modeling of Microcystis aeruginosa and Planktothrix agardhii under iron limitation Limnology, 8(3) 261-270 10, Nara F, Imai A, Yoneda M, Matsushige K, Komatsu K, Nagai T, Shibata Y, Watanabe T (2007) Seasonal variation in sources of dissolved organic carbon in a lacustrine environment revealed by paired isotopic measurements (Δ14C and δ13C) Radiocarbon, 49(2) 767-773 9, Oyama Y, Matsushita B, Fukushima T, Nagai T, Imai A (2007) A new algorithm for estimating chlorophyll-a concentration from multi-spectral satellite data in Case II waters -A simulation based on a controlled laboratory experiment- International Journal of Remote Sensing, 28(7), 1437-1453 8, Nagai T, Imai A, Matsushige K, Yokoi K, Fukushima T (2007) Dissolved iron and its speciation in a shallow eutrophic lake and its inflowing rivers Water Research, 41(4), 775-784 7, Nagai T, Imai A, Matsushige K, Fukushima T (2006) Effect of iron complexation with dissolved organic matter on the growth of cyanobacteria in a eutrophic lake Aquatic Microbial Ecology 44(3), 231-239 6, Nagai T, Imai A, Matsushige K, Fukushima T (2005) Limiting nutrients on the growth of bloom-forming cyanobacteria with special focus on iron speciation Verhandlungen Internationale Vereinigung fur theoretische und angewandte Limnologie, 29(2) 949-952 5, Nagai T, Imai A, Matsushige K, Yokoi K, Fukushima T (2004) Voltammetric determination of dissolved iron and its speciation in freshwater Limnology 5(2), 87-94 4, Choi K, Imai A, Matsushige K, Nagai T, Kim YH, Kim B (2003) Photoalteration in biodegradability and chemical compositions of algae-derived dissolved organic matter Korean Journal of Limnology 36(3), 235-241 3, Imai A, Matsushige K, Nagai T (2003) Triharomethane formation potential of dissolved organic matter in a shallow eutrophic lake Water Research 37(17), 4284-4294 2, Nagai T, Ru S, Katoh A, Dong S, Kuwabara T (2001) An extracellular hemolysin homolog from cyanobacterium Synechocystis sp. PCC6803. Proceedings of the 12th International Congress on Photosynthesis, S36-010 1, Kuwabara T, Nagai T, Ru S, Dong S (2000) Assessment of interaction between scallop and cyanobacteria with special focus on cyanobacterial hemolysin Biosystem Studies 3, 205 Last Updated, March 2017 |