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Dr Ayato Kohzu | Inland water | Excellence in Research

Reginal Environmental Conservation Divisio at  National Institute for Environmental Studies, Japan

Ayato Kohzu, Ph.D., is a prominent figure in environmental science and limnology, currently serving as the Chief of the National Institute for Environmental Studies (NIES) in Japan. Born on March 20, 1972, in Tsukuba, Ibaraki, Japan, Kohzu’s academic journey began with a degree from Rakusei High School in Kyoto. He went on to earn his Doctor of Science degree from Kyoto University in 2000, where his doctoral dissertation showcased his dedication to advancing the understanding of ecosystem dynamics.

Publication Profile:🌟👨‍🎓


  • Graduated from Rakusei High School, Kyoto, Japan (Apr. 1987 – Mar. 1990)
  • Doctor of Science from Kyoto University, Japan (Mar. 2000)

Work Experience:

  • Chief at NIES, Japan (Apr. 2016 – Present)
  • Chief Researcher at NIES, Japan (Jul. 2010 – Mar. 2016)
  • Special Researcher at NIES, Japan (Apr. 2008 – Jun. 2010)
  • CREST Post Doctor at Japan (Apr. 2004 – Mar. 2008)
  • JSPS Post Doctor at Japan (Apr. 2001 – Mar. 2004)


  • Ecological Society of America
  • Japanese Limnological Society
  • Japanese Water Environmental Society

🔬 Research Focus:

Ayato Kohzu’s research focuses on understanding the intricate dynamics of ecosystems 🌱, particularly emphasizing the impact of various environmental factors on water quality and ecological stability. His investigations delve into diverse topics, including the effects of extreme precipitation on shallow lakes 🌊, the structural functions of sediment burrows using magnetic resonance imaging 🧲, and the consequences of macrophyte harvesting on aquatic environments 🌿. Kohzu’s work also explores the alteration of carbon and nitrogen isotopes during sedimentation processes, providing direct evidence for understanding early diagenesis in lake ecosystems. Through his research, Kohzu contributes significantly to advancing our knowledge of ecological systems and their responses to environmental changes.


Ayato Kohzu’s research has garnered significant recognition, with 1,528 citations across 88 documents, resulting in an h-index of 21. This indicates the substantial impact of his work within the scientific community.

Publications Top Notes:

  1. Kohzu, A., Matsuzaki, S.-I.S., Komuro, S., et al. (2023). Identifying the true drivers of abrupt changes in ecosystem state with a focus on time lags: Extreme precipitation can determine water quality in shallow lakes. Science of the Total Environment, 881, 163097.
  2. Shinohara, R., Matsuzaki, S.-I.S., Watanabe, M., et al. (2023). Heat Waves Can Cause Hypoxia in Shallow Lakes. Geophysical Research Letters, 50(8), e2023GL102967.
  3. Matsuzaki, S.-I.S., Kohzu, A., Tsuchiya, K., et al. (2023). Water-level drawdowns can improve surface water quality and alleviate bottom hypoxia in shallow, eutrophic water bodies. Freshwater Biology, 68(2), pp. 229–244.
  4. Shinohara, R., Tsuchiya, K., Kohzu, A., et al. (2022). The composition of organic phosphorus in a river during the springtime irrigation period. Journal of Hydrology: Regional Studies, 44, 101238.
  5. Inoue, T., Akaji, Y., Kohzu, A., et al. (2022). Relationship between plant growth and soil chemical properties in a mangrove afforestation stand, Kiribati. Plant and Soil, 479(1-2), pp. 559–571.
  6. Nakanishi, K., Yokomizo, H., Fukaya, K., et al. (2022). Inferring causal impacts of extreme water-level drawdowns on lake water clarity using long-term monitoring data. Science of the Total Environment, 838, 156088.
  7. Shinohara, R., Matsuzaki, S.-I.S., Nakagawa, M., Tsuchiya, K., Kohzu, A. (2022). Does increased springtime solar radiation also increase primary production? Journal of Plankton Research, 44(4), pp. 496–506.


Ayato Kohzu | Inland water | Excellence in Research

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