Prof. Toshi Nagata (Marine Biogeochemistry Group)

My research interests cover a broad range of topics in marine biogeochemistry and ecology. Current research themes include organic matter-microbe interactions in marine environments. This research investigates how microbes degrade and transform organic matter to affect carbon and nitrogen cycles in marine systems. I am also interested in the application of isotope methods to investigate the ecology of marine organisms and biogeochemical processes. This includes exploring the application of radiocarbon and compound specific isotope ratios as natural tracers of marine organismal growth, migration, and diet histories. The overall goal is to contribute to a better understanding of mechanisms by which marine ecosystems respond to regional and global environmental changes. See the project page for more details.


I completed my Master and Doctor’s degrees in limnology (zoology) at Kyoto University, before joining Dave Kirchman’s lab at University of Delaware as a postdoc, and subsequently serving on the faculty of Nagoya University, Kyoto University and The University of Tokyo. I currently serve as responsible editor for following journals. Frontiers in Marine Science; Marine Ecology Progress Series

(Full CV)


Recent publications

Whole Publication List

NAGATA, T., YAMADA, Y. & FUKUDA, H. (2021) Transparent Exopolymer Particles in Deep Oceans: Synthesis and Future Challenges. Gels 7, 75

Shiozaki, T., Tada, Y., Fukuda, H., Furuya, K., and Nagata, T. (2020) 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 1, online 19 May 2020

Wyatt, A.S.J., Leichter, J.J., Toth, L.T., Miyajima, T., Aronson, R.B. and Nagata, T. (2020) Heat accumulation on coral reefs mitigated by internal waves. Nature Geoscience, DOI: 10.1038/s41561-019-0486-4

Wyatt, A.S.J., R. Matsumoto, Y. Chikaraishi, Y. Miyairi, Y. Yokoyama, K. Sato, N. Ohkouchi, and T. Nagata (2019) Enhancing insights into foraging specialization in the world’s largest fish using a multi-tissue, multi-isotope approach. Ecological Monographs, DOI: 10.1002/ecm.1339

Satoh, N., H. Fukuda, Y. Miyairi, Y. Yokoyama, and T. Nagata (2019) Position-dependent radiocarbon content of the macroalgae Undaria pinnatifida as an indicator of oceanographic conditions during algal growth. Journal of Oceanography, 2019

Mario Uchimiya, Hideki Fukuda, Masahide Wakita, Minoru Kitamura, Hajime Kawakami, Makio C. Honda, Hiroshi Ogawa, Toshi Nagata (2018) Balancing organic carbon supply and consumption in the ocean’s interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific. LIMNOLOGY AND OCEANOGRAPHY   63(5) 2015-2027   2018年5月|

Yamada, Y., Tomaru, Y., Fukuda, H. and Nagata T. (2018) Aggregate Formation During the Viral Lysis of a Marine Diatom. Frontiers in Marine Science-Marine Biogeochemistry

Yamada Y, Yokokawa T, Uchimiya M, Nishino S, Fukuda H, Ogawa H, Nagata T (2017) Transparent exopolymer particles (TEP) in the deep ocean: Full-depth distribution patterns and contribution to the organic carbon pool. Marine Ecology Progress Series. 583:81-93.