Latest Update：2026/04/21 10:00:57

KOZU Ayato

Researcher Name: KOZU Ayato

Div (Section) name/title: Regional Environment Conservation Division（Lake and River Section）／Head

Research Subject: Proposing Sustainable Environmental Improvement Measures that Actively Restore Ecosystems, Particularly Sediment Environments, through the Use of Green Infrastructure

Degree(s): Doctorate of science

Professional Qualification(s): Biology,Agricultural Science,Forestry

Environmental Speciality Field: biogeochemistry,water environment,green infrastructure

Keyword(s): isotope ecology,foodweb analysis,decomposition processes,Nitrogen cycling,Carbon cycling,Chronological statistical analysis,sediment quality improvement,Eutrophication Control Measures

Brief Description of Research: In future limnological research, it is important to focus on littoral ecosystems, which remain relatively understudied, and to advance analyses of the influences of watershed processes and meteorological conditions on these systems, thereby accumulating findings that contribute to watershed and littoral management.

Our laboratory has developed a variety of advanced methods for water quality analysis and environmental monitoring, including drone-based monitoring, a continuous porewater sampling system for bottom sediments, a gas collection system for sediment gas, visualization of sediment gas bubbles and burrow structures, carbon, nitrogen, and oxygen isotope analyses of diverse materials, fast repetition rate fluorometry (FRRf) enabling in situ measurements of photosynthetic activity, and analyses of dissolved organic matter characteristics. By applying these environmental monitoring techniques, we aim to propose technologies and environmental restoration measures that can actively improve ecosystems, particularly sediment environments, and to verify their effectiveness. By integrating investigative and research methods for lake and river environments from basic to applied science, we will promote research that contributes to the soundness of watershed environments and the maximization of ecosystem services.

Furthermore, from the perspective of climate change adaptation research, it will become increasingly important to understand how river and lake ecosystems respond to droughts and floods, and how these responses may in turn affect downstream inner bays and similar water bodies. Using high-frequency data obtained from sensor loggers, we will analyze the impacts of flood events and rising water temperatures, and disseminate the results. At the same time, we will actively introduce statistical methods for estimating causal relationships among water quality variables, thereby building an innovative monitoring system for aquatic environments.

Career: Mar. 2000 Doctorate of science at Kyoto University
April 2000 Research Fellow, JSPS Research for the Future Program
Center for Ecological Research, Kyoto University
April 2001 JSPS Research Fellow
Center for Ecological Research, Kyoto University
April 2004 Research Fellow, Strategic Basic Research Programs,
Japan Science and Technology Agency (JST)
Center for Ecological Research, Kyoto University
April 2008 NIES Research Fellow,
Lake Environment Research Laboratory,
Water and Soil Environment Division,
National Institute for Environmental Studies (NIES)
July 2010 Senior Researcher,
Lake Environment Research Laboratory,
Water and Soil Environment Division, NIES
April 2011 Senior Researcher,
Lake and River Environment Research Laboratory,
Center for Environmental Biology and Ecosystem Studies, NIES
April 2015 Senior Researcher,
Lake and River Environment Research Laboratory,
Center for Environmental Biology and Ecosystem Studies, NIES
April 2016 Head, Lake and River Environment Research Laboratory,
Center for Environmental Biology and Ecosystem Studies, NIES
April 2017 Concurrent Appointment, Lake Biwa Branch,
Center for Environmental Biology and Ecosystem Studies, NIES
December 2018 Concurrent Appointment,
Center for Climate Change Adaptation, NIES
April 2020 Head, Lake and River Research Laboratory,
Environmental Conservation Division, NIES

URL: https://www.nies.go.jp/researchers/204556.html

Research Subject

Fiscal Year: 2025
- 27213 : Research on problem solving using ecosystem functions
- 27221 : Study for sustainable society based on regional collaboration
- 27233 : Research on evaluation and clarification of effects and mechanisms of climate change
- 27234 : Research on Advancement of Climate Change Impact Assessment Methodology
- 27235 : Research to enhance adaptation strategies and practices based on scientific projections
- 27247 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 27250 : Biodiversity Domain: Intellectual Research Infrastructure Development
- 27363 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 27477 : Policy-oriented research on conservation and restoration of water environment of Lake Biwa
- 27484 : Assessing the function of benthic animals for water and sediment quality and estimating the risks caused by their decline
- 27486 : Research on water and lake-bottom environment for soundness evaluation of Lake Biwa
- 27487 : Long-term monitoring for the regional freshwater quality
- 27493 : Monitoring and estimation of the climatic change effects on Japanese natural lakes
Fiscal Year: 2024
- 26827 : Research on problem solving using ecosystem functions
- 26836 : Study for sustainable society based on regional collaboration
- 26848 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26849 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26850 : Research to enhance adaptation strategies and practices based on scientific projections
- 26864 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26869 : Biodiversity Domain: Intellectual Research Infrastructure Development
- 26949 : Monitoring and estimation of the climatic change effects on Japanese natural lakes
- 27020 : Long-term monitoring for the regional freshwater quality
- 27022 : Policy-oriented research on conservation and restoration of water environment of Lake Biwa
- 27025 : Research on water and lake-bottom environment for soundness evaluation of Lake Biwa
- 27092 : Assessing the function of benthic animals for water and sediment quality and estimating the risks caused by their decline
- 27100 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
Fiscal Year: 2023
- 26418 : Research on problem solving using ecosystem functions
- 26425 : Study for sustainable society based on regional collaboration
- 26435 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26436 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26437 : Research to enhance adaptation strategies and practices based on scientific projections
- 26453 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26456 : Biodiversity Domain: Intellectual Research Infrastructure Development
- 26556 : Monitoring and estimation of the climatic change effects on Japanese natural lakes
- 26633 : Policy-oriented research on conservation and restoration of water environment of Lake Biwa
- 26634 : Research on water and lake-bottom environment for soundness evaluation of Lake Biwa
- 26657 : Assessing the function of benthic animals for water and sediment quality and estimating the risks caused by their decline
- 26658 : Long-term monitoring for the regional freshwater quality
- 26736 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 26752 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
Fiscal Year: 2022
- 25982 : Research on problem solving using ecosystem functions
- 25989 : Study for sustainable society based on regional collaboration
- 26001 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26002 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26003 : Research to enhance adaptation strategies and practices based on scientific projections
- 26010 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26014 : Biodiversity Domain: Intellectual Research Infrastructure Development
- 26208 : Policy-oriented research on conservation and restoration of water environment of Lake Biwa
- 26225 : Research on water and lake-bottom environment for soundness evaluation of Lake Biwa
- 26226 : Long-term monitoring for the regional freshwater quality
- 26257 : Water level operation for ecosystem regime management of lakes
- 26293 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 26294 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
- 26305 : Study on Sustainable Ecosystem Management of River Watersheds toward Climate-Change Adaptation
- 26341 : Monitoring and estimation of the climatic change effects on Japanese natural lakes
Fiscal Year: 2021
- 25515 : Research on problem solving using ecosystem functions
- 25522 : Study for sustainable society based on regional collaboration
- 25535 : Research on evaluation and clarification of effects and mechanisms of climate change
- 25536 : Research on Advancement of Climate Change Impact Assessment Methodology
- 25537 : Research to enhance adaptation strategies and practices based on scientific projections
- 25644 : Monitoring and estimation of the climatic change effects on Japanese natural lakes
- 25674 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 25697 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
- 25713 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 25774 : Water level operation for ecosystem regime management of lakes
- 25811 : Biodiversity Domain: Intellectual Research Infrastructure Development
- 25828 : Long-term monitoring for the regional freshwater quality
- 25842 : Policy-oriented research on conservation and restoration of water environment of Lake Biwa
- 25844 : Research on water and lake-bottom environment for soundness evaluation of Lake Biwa
- 25910 : Study on Sustainable Ecosystem Management of River Watersheds toward Climate-Change Adaptation
Fiscal Year: 2020
- 25098 : Harmonization with Nature Research Program
- 25099 : Research Program on Health and Environmental Safety
- 25121 : Long-term Monitoring Projects of Freshwater Ecosystems
- 25127 : Center for Climate Change Adaptation (CCCA)
- 25140 : Evaluation of Ecosystem Functions and Services and their Sustainable Use
- 25147 : Project to Develop Water Quality Improvement and Assessment Methods for Aquatic Environment Conservation
- 25327 : Studies on Advancing the Methods for Climate Change Impacts Assessment
- 25390 : Study on Sustainable Ecosystem Management of River Watersheds toward Climate-Change Adaptation
- 25391 : Effects of climate change and urbanization on river water temperature and quality
- 25448 : Study on water quality and lake-bottom environment for protection of the soundness of water environment
Fiscal Year: 2019
- 24695 : Harmonization with Nature Research Program
- 24696 : Research Program on Health and Environmental Safety
- 24720 : Evaluation of Ecosystem Functions and Services and their Sustainable Use
- 24727 : Project to Develop Water Quality Improvement and Assessment Methods for Aquatic Environment Conservation
- 24753 : Long-term Monitoring Projects of Freshwater Ecosystems
- 24757 : Center for Climate Change Adaptation (CCCA)
- 24794 : Study on water quality and lake-bottom environment for protection of the soundness of water environment
- 24841 : Multi-dimensional evaluation of ecosystem services of wetlands and establishment of Japanese wetland database
- 24975 : Studies on Advancing the Methods for Climate Change Impacts Assessment
- 25053 : Studies about the appropriate method for monitoring and evaluation of the dissolved oxygen concentration in the lake bottom water that were recently introduced to the Japanese Environmental Quality Standards for Water Pollution
Fiscal Year: 2018
- 24303 : Evaluation of ecosystem functions and services and their sustainable use
- 24310 : Project to develop water quality improvement and assessment methods for aquatic environment conservation
- 24323 : Long-term monitoring projects of freshwater ecosystems
- 24340 : Climate Change Strategy Collaboration Office
- 24354 : Harmonization with Nature Research Program
- 24355 : Research program on health and environmental safety
- 24394 : Development of adaptation technology for sewage under rainy weather and its evaluation on water environment
- 24528 : Study on water quality and lake-bottom environment for protection of the soundness of water environment
- 24584 : Studies about the appropriate method for monitoring and evaluation of the dissolved oxygen concentration in the lake bottom water that were recently introduced to the Japanese Environmental Quality Standards for Water Pollution
Fiscal Year: 2017
- 23818 : Project to develop water quality improvement and assessment methods for aquatic environment conservation
- 23825 : Evaluation of ecosystem functions and services and their sustainable use
- 23845 : Harmonization with Nature Research Program
- 23847 : Research program on health and environmental safety
- 23861 : Climate Change Strategy Collaboration Office
- 23885 : Long-term monitoring projects of freshwater ecosystems
- 23910 : Studies about the appropriate method for monitoring and evaluation of the dissolved oxygen concentration in the lake bottom water that were recently introduced to the Japanese Environmental Quality Standards for Water Pollution
- 24148 : Mangrove plants and nitrogen fixers
- 24176 : Study on water quality and lake-bottom environment for protection of the soundness of water environment
- 24216 : Development of adaptation technology for sewage under rainy weather and its evaluation on water environment
Fiscal Year: 2016
- 23408 : Harmonization with Nature Research Program
- 23413 : Evaluation of ecosystem functions and services and their sustainable use
- 23414 : Research program on health and environmental safety
- 23421 : Project to develop water quality improvement and assessment methods for aquatic environment conservation
- 23478 : Long-term monitoring projects of freshwater ecosystems
- 23704 : Mangrove plants and nitrogen fixers
- 23736 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
Fiscal Year: 2015
- 23010 : Assessment of functions and integrity of basin ecosystems
- 23011 : Evaluation on linkage between ecosystem function and environmental factor in river basin
- 23034 : Monitoring projects and database management of biodiversity and ecosystem
- 23313 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
- 23314 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
- 23334 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
- 23335 : Analysis of sediment remediation mechanism by microbial fuel cell in lacustrine environment
Fiscal Year: 2014
- 22598 : Assessment of functions and integrity of basin ecosystems
- 22599 : Evaluation on linkage between ecosystem function and environmental factor in river basin
- 22622 : Monitoring projects and database management of biodiversity and ecosystem
- 22751 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
- 22754 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
- 22794 : Freshwater environmental analysis by using 13C and 14C natural abundances in dissolved inorganic carbon
- 22798 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
- 22812 : Analysis and Prediction of Radioactive Substances Behavior in Multimedia Environment
- 22968 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
Fiscal Year: 2013
- 22182 : Assessment of functions and integrity of basin ecosystems
- 22183 : Evaluation on linkage between ecosystem function and environmental factor in river basin
- 22206 : Monitoring projects and database management of biodiversity and ecosystem
- 22209 : Study on dynamics of radioactive materials in multimedia environment
- 22275 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
- 22293 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
- 22472 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
- 22473 : Freshwater environmental analysis by using 13C and 14C natural abundances in dissolved inorganic carbon
Fiscal Year: 2012
- 21753 : Assessment of functions and integrity of basin ecosystems
- 21754 : Evaluation on linkage between ecosystem function and environmental factor in river basin
- 21777 : Monitoring projects and database management of biodiversity and ecosystem
- 21827 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
- 22040 : Evaluation and prediction of nitrogen load from nitrogen saturated forest area
- 22119 : Freshwater environmental analysis by using 13C and 14C natural abundances in dissolved inorganic carbon
Fiscal Year: 2011
- 21278 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
- 21279 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
- 21312 : Evaluation on linkage between ecosystem function and environmental factor in river basin
- 21335 : Monitoring projects and database management of biodiversity and ecosystem
- 21513 : Development of a technique for calculating algal-derived organic carbon level in lake
- 21678 : Studies of carbon cycling within river watershed by the analysis of 13C natural abundance of dissolved inorganic carbon (DIC) in lotic environments
- 21689 : The analysis of nitrogen loading and discharge within watershed by nitrogen and oxygen isotope measurement of nitrate, dissolved or suspended organic matter
Fiscal Year: 2010
- 20872 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
- 20873 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
- 21258 : Evaluation and prediction of nitrogen load from nitrogen saturated forest area and development of its reduction scenario
Fiscal Year: 2009
- 20454 : N discharge and transformation processes within river ecosystems by using nitrogen and oxgen isotope analysis of nitrate
- 20455 : Identification of N loading and discharge processes within river ecosystems by using N and O isotope analysis of nitrate
- 20472 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
- 20473 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
- 20474 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
Fiscal Year: 2008
- 20059 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
- 20343 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
- 20372 : N discharge and transformation processes within river ecosystems by using nitrogen and oxgen isotope analysis of nitrate
- 20373 : Identification of N loading and discharge processes within river ecosystems by using N and O isotope analysis of nitrate

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Research Result (Publication)

Original Paper

Spatial variation of multifunctionality among abandoned rice paddies and irrigation ponds: potential roles of hydrological and environmental factors

Presenter : Matsuzaki S., Kohzu A., Watanabe M., Nakanishi K., Tsuchiya K., Kondo N., Sueyoshi M.
Title : , Restoration Ecology, 33(8):e70161 (2026)
Original Paper

Spatial, temporal, and biotic changes in the natural abundances of stable carbon and nitrogen isotopes in a biological treatment reactor

Presenter : Onodera T., Kubota K., Iguchi A., Nagamachi A., Tagawa T., Kanaya G., Kohzu A., Syutsubo K.
Title : , Journal of Bioscience and Bioengineering, 141(2):135-141 (2026)
Original Paper

Effects of winter heatwaves on carbon dioxide and methane emissions from shallow lakes: A temperature-controlled mesocosm study

Presenter : Tang H., Zhao X., Deng J., Qiu B., Yang Y., Nakano S., Matsuzaki S., Shinohara R., Kohzu A., Tsuchiya K.
Title : , Journal of Hydrology, 665(134704): (2026)
Original Paper

Diel temperature patterns unveiled: High-frequency monitoring and deep learning in Lake Kasumigaura

Presenter : Zhu S., Shinohara R., Matsuzaki S., Kohzu A., Watanabe Mirai., Nakagawa M., Nunno F.D. , Sun J., Zhou Q., Granata F.
Title : , Ecological Indicators, 169:112958 (2025)
Book

Chapter 8 The Advancement of Climate Change Impact Assessment Methodology Project at National Institute for Environmental Studies

Presenter : Hanasaki N., Okada M., Ishizaki N., Masutomi Y., Inoue T., Wang Q-X., Koide D., Kohzu A., Kumagai N., Higashi H., Oka K., Ishihama F., Hayashi S.
Title : , Climate Change Impacts and Adaptation Strategies in Japan (2025)
Original Paper

Identification of wastewater-specific peak on EEM and their application for detecting the effluent in the discharged area

Presenter : Komatsu K., Onodera T., Tsuchiya K., Kohzu A., Syutsubo K.
Title : , Water Research, 275(123213): (2025)
Original Paper

Relationship between nitrogen removal and habitat provisioning functions of small wetlands originated from abandoned paddy fields: multisite comparison and experimental verification

Presenter : Kato H., Kohzu A., Nishihiro J.
Title : , Landscape and Ecological Engineering , 21:163-174 (2025)
Original Paper

Does nitrate suppress phosphorus release from sediment? A case study in Lake Kasumigaura, Japan

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Hydrology: Regional Studies, 58:102233 (2025)
Original Paper

Estimating internal dissolved methane loading in rivers using a mass balance approach

Presenter : Tsuchiya K., Miura S., Kohzu A.
Title : , PeerJ, 13(e20238): (2025)
Other Publications

Bruguiera gymnorhiza forms mycorrhizal associations but Rhizophora stylosa does not: A pot experiment using mangrove soil and Rhizophoraceae seedlings

Presenter : Akaji Y., Inoue T., Kohzu A., Taniguchi T., Baba S.
Title : , Aquatic Botany, 192:103748 (2024)
Original Paper

Diazotrophic nitrogen fixation through aerial roots occurs in Avicennia marina: implications for adaptation of mangrove plant growth to low-nitrogen tidal flats.

Presenter : Inoue T., Kohzu A., Akaji Y., Miura S., Baba S.
Title : , New Phytologist, 241:1464-1475 (2024)
Original Paper

Vertical eDNA distribution of cold-water fishes in response to environmental variables in stratified lake

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Title : , Ecology and Evolution, 14(3):e11091-e11091 (2024)
Original Paper

Relationship between fish traits and the methane-derived carbon contribution to fish in a shallow lake

Presenter : Tsuchiya K., Matsuzaki S., Kohzu A.
Title : , Freshwater Biology, 69(10):1468-1478 (2024)
Original Paper

Water-level drawdowns can improve surface water quality and alleviate bottom hypoxia in shallow, eutrophic water bodies

Presenter : Matsuzaki S., Kohzu A., Tsuchiya K., Shinohara R., Nakagawa M., Fukumori K., Yamaguchi H., Kondo N., Kadoya T.
Title : , Freshwater Biology, 68(2):229-244 (2023)
Original Paper

Heat Waves Can Cause Hypoxia in Shallow Lakes

Presenter : Shinohara R., Matsuzaki S., Watanabe Mirai., Nakagawa M., Yoshida H., Kohzu A.
Title : , Geophysical Research Letters, 50(8): (2023)
Original Paper

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

Presenter : Kohzu A., Matsuzaki S., Komuro S., Komatsu K., Takamura N., Nakagawa M., Imai A., Fukushima T.
Title : , Science of the Total Environment, 881:163097 (2023)
Original Paper

Use of legacy nitrogen as a resource: Unfertilized lotus fields contribute to water quality improvement and biodiversity conservation

Presenter : Matsuzaki S., Kohzu A., Watanabe Mirai., Kondo N., Tatsuta A.
Title : , Nature-Based Solutions, 4(100080): (2023)
Original Paper

Horizontal variability and regulation of bacterial production in Lake Biwa, Japan.

Presenter : Tsuchiya K., Tomioka N., Komatsu K., Sano T., Kohzu A., Imai A., Hayakawa K., Nagata T., Okamoto T., Ohara T.
Title : , Limnology, 23:231-243 (2022)
Original Paper

Inferring causal impacts of extreme water-level drawdowns on lake water clarity using long-term monitoring data

Presenter : Nakanishi K., Yokomizo H., Fukaya K., Kadoya T., Matsuzaki S., Nishihiro J., Kohzu A., Hayashi T.
Title : , Science of The Total Environment, 838(2): (2022)
Original Paper

Relationship between plant growth and soil chemical properties in a mangrove afforestation stand, Kiribati

Presenter : Inoue T., Akaji Y., Kohzu A., Hinokidani K., Adachi H., Kezuka M, Baba S.
Title : , Plant and Soil (2022)
Book

Mangroves of Japan

Presenter : Inoue T., Kohzu A., Akaji Y., Miura S., Baba S.
Title : , A book on Mangroves: Biodiversity, livelihoods and conservation (2022)
Original Paper

Does increased springtime solar radiation also increase primary production?

Presenter : Shinohara R., Matsuzaki S., Nakagawa M., Tsuchiya K., Kohzu A.
Title : , Journal of Plankton Research, 44(4):497-507 (2022)
Original Paper

The composition of organic phosphorus in a river during the springtime irrigation period

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Hydrology: Regional Studies, 44:101238 (2022)
Original Paper

Evaluation of stable isotope ratios (δ15N and δ18O) of nitrate in advanced sewage treatment processes: isotopic signature in four process types

Presenter : Onodera T., Komatsu K., Kohzu A., Kanaya G., Mizuochi M., Syutsubo K.
Title : , Science of the Total Environment, 762(144120): (2021)
Original Paper

Seasonal dynamics of the activities of dissolved 137Cs and the 137Cs of fish in a shallow, hypereutrophic lake: Links to bottom-water oxygen concentrations

Presenter : Matsuzaki S., Tanaka A., Kohzu A., Suzuki K., Komatsu K., Shinohara R., Nakagawa M., Nohara S., Ueno R., Satake K., Hayashi S.
Title : , Science of The Total Environment, 761:143257 (2021)
Original Paper

Development of a new high-throughput and small-size method for measuring sediment oxygen demand in lakes.

Presenter : Shimotori K., Yamamoto H., Imai A., Kohzu A., Okamoto T.
Title : , Journal of Soils and Sediments, 21:1222-1231 (2021)
Original Paper

Differences in the isotopic signature of activated sludge in four types of advanced treatment processes at a municipal wastewater treatment plant

Presenter : Onodera T., Komatsu K., Kohzu A., Kanaya G., Mizuochi M., Syutsubo K.
Title : , Journal of Environmental Management, 286(112264): (2021)
Original Paper

Patterns of CO2 concentration and inorganic carbon limitation of phytoplankton biomass in agriculturally eutrophic lakes

Presenter : Zagarese H.E., González Sagrario, M.A., Wolf-Gladrow D., Nõges P., Nõges T., Kangur K., Matsuzaki S., Kohzu A., Vanni M.J., Özkundakci D., Echaniz S.A., Vignatti A., Grosman F., Sanzano P., Van Dam B., Knoll L.B.
Title : , Water Research, 190(15):116715 (2021)
Original Paper

Differences in regulation of planktonic and epilithic biofilm bacterial production in the middle reaches of a temperate river

Presenter : Tsuchiya K., Kohzu A., Kuwahara V.S., Matsuzaki S., Denda M., Hirabayashi K.
Title : , Aquatic Microbial Ecology, 87:47-60 (2021)
Book

Inflow/Outflow of Radiocesium in a Dam Lake and Its Accumulation in Sediments

Presenter : Tsuji H., Kohzu A., Sato T., Hayashi S.
Title : , Impacts of Fukushima Nuclear Accident on Freshwater Environments (2021)
Original Paper

Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Water and Climate Change, 12(7):3187 (2021)
Original Paper

Distribution in natural abundances of stable isotopes of nitrate and retained sludge in a nitrifying bioreactor: Drastic changes in isotopic signatures

Presenter : Onodera T., Kanaya G., Kohzu A., Syutsubo K.
Title : , Science of the Total Environment, 705(134438): (2020)
Original Paper

Characterization of dissolved organic matter in wastewater during aerobic, anaerobic, and anoxic treatment processes by molecular size and fluorescence analyses

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Title : , Water Research, 171: (2020)
Original Paper

Incorporation characteristics of exogenous 15N-labeled thymidine, deoxyadenosine, deoxyguanosine and deoxycytidine into bacterial DNA

Presenter : Tsuchiya K., Sano T., Tomioka N., Kohzu A., Komatsu K., Shinohara R., Shimode S., Toda T., Imai A.
Title : , PLoS ONE, 15(2)(e0229740): (2020)
Original Paper

Effects of downwash during unmanned aircraft system-assisted water sampling on water mass structure directly below the UAS

Presenter : Miura S., Kohzu A.
Title : , Limnology and Oceanography: Methods (2020)
Original Paper

Magnetic Resonance Imaging as a Novel Method for Elucidating Sediment Burrow Structures and Functions

Presenter : Kohzu A., Watanabe H., Imai A., Takaya N., Miura S., Shimotori K., Komatsu K.
Title : , ACS OMEGA, 5(25):14933-14941 (2020)
Original Paper

Variability of benthic methane-derived carbon along seasonal, biological, and sedimentary gradients in a polymictic lake

Presenter : Tsuchiya K., Komatsu K., Shinohara R., Imai A., Matsuzaki S., Ueno R., Kuwahara V.S., Kohzu A.
Title : , Limnology and Oceanography (2020)
Original Paper

Novel method for measuring aquatic bacterial productivity using D10-leucine based on protein synthesis rate

Presenter : Tsuchiya K., Sano T., Tomioka N., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Kuwahara V. S., Kohzu A.
Title : , Aquatic Microbial Ecology, 85:121-129 (2020)
Original Paper

Vertical/spatial movement and accumulation of 137Cs in a shallow lake in the initial phase after the Fukushima Daiichi nuclear power plant accident

Presenter : Tsuji H., Tanaka A., Komatsu K., Kohzu A., Matsuzaki S., Hayashi S.
Title : , Applied Radiation and Isotopes (2019)
Original Paper

Long-term observations of the vertical distributions of mineral elements and phosphorus dynamics in sediments in a shallow eutrophic lake in Japan

Presenter : Shimotori K., Imai A., Kohzu A., Komatsu K., Koshikawa-K.M., Hayashi S., Watanabe Mirai.
Title : , Journal of Soils and Sediments, 19(3):1566-1575 (2019)
Original Paper

Vertical variation of bulk and metabolically active prokaryotic community in sediment of a hypereutrophic freshwater lake

Presenter : Tsuboi S., Kohzu A., Imai A., Iwasaki K., Yamamura S.
Title : , Environmental Science and Pollution Research, 26:9379-9389 (2019)
Original Paper

Seasonal variability and regulation of bacterial production in a shallow eutrophic lake

Presenter : Tsuchiya K., Sano T., Tomioka N., Kohzu A., Komatsu K., Shinohara R., Takamura N., Nakagawa M., Sugai Y., Kuwahara V. S. , Toda T., Fukuda H., Imai A.
Title : , Limnology and Oceanography (2019)
Original Paper

Decrease in bacterial production over the past three decades in the north basin of Lake Biwa, Japan

Presenter : Tsuchiya K., Tomioka N., Sano T., Kohzu A., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Hirose Y.
Title : , Limnology (2019)
Original Paper

Tracking the route of atmospheric nitrogen to diazotrophs colonizing buried mangrove roots

Presenter : Inoue T., Kohzu A., Shimono A.
Title : , Tree Physiology (2019)
Original Paper

Role of wetlands in mitigating the tradeoff between crop production and water quality in agricultural landscapes

Presenter : Matsuzaki S., Kohzu A., Kadoya T., Watanabe Mirai., Osawa T., Komatsu K., Kondo N., Yamaguchi H., Ando H., Shimotori K., Fukaya K., Nakagawa M., Kizuka T., Yoshioka A., Sasai T., Saigusa N., Matsushita B., Takamura N.
Title : , Ecosphere, 10(11):e02918 (2019)
Original Paper

Coniferous coverage as well as catchment steepness influences local stream nitrate concentrations within a nitrogen-saturated forest in central Japan

Presenter : Watanabe Mirai., Miura S., Hasegawa S., Koshikawa-K.M., Takamatsu T., Kohzu A., Imai A.
Title : , Science of the Total Environment, 636:539-546 (2018)
Original Paper

Evaluation of trophic transfer in the microbial food web during sludge degradation based on 13C and 15N natural abundance

Presenter : Onodera T., Kanaya G., Hatamoto M., Kohzu A., Iguchi A., Takimoto Y., Yamaguchi T., Mizuochi M., Syutsubo K.
Title : , Water Research, 146:30-36 (2018)
Original Paper

Effects of macrophyte harvesting on the water quality and bottom environment of Lake Biwa,Japan

Presenter : Kohzu A., Shimotori K., Imai A.
Title : , Limnology (2018)
Original Paper

Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study

Presenter : Shinohara R., Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Title : , Limnology, 18(1):141-151 (2017)
Original Paper

Role of organic phosphorus in sediment in a shallow eutrophic lake

Presenter : Shinohara R., Hiroki M., Kohzu A., Imai A., Inoue T., Furusato E., Komatsu K., Sato T., Tomioka N., Shimotori K., Miura S.
Title : , Water Resources Research, 53:7175-7189 (2017)
Original Paper

Dynamics of particulate phosphorus in a shallow eutrophic lake

Presenter : Shinohara R., Imai A., Kohzu A., Tomioka N., Furusato E., Sato T., Sano T., Komatsu K., Miura S., Shimotori K.
Title : , Science of the Total Environment, 563-564(1):413-423 (2016)
Original Paper

Microbial nitrification in throughfall of a Japanese cedar associated with archaea from the tree canopy

Presenter : Watanabe K., Kohzu A., Suda W., Yamamura S., Takamatsu T., Takenaka A., Koshikawa-K.M., Hayashi S., Watanabe Mirai.
Title : , SpringerPlus, 5(1596): (2016)
Original Paper

Quantification and characterization of coastal dissolved organic matter by high-performance size exclusion chromatography with ultraviolet absorption, fluorescence, and total organic carbon analyses

Presenter : Shimotori K., Satou T., Imai A., Kawasaki N., Komatsu K., Kohzu A., Tomioka N., Shinohara R., Miura S.
Title : , Limnology and Oceanography: Methods, 14(10):637-648 (2016)
Original Paper

Release of Nitrogen and Phosphorus from Aquaculture Farms to Selangor River, Malaysia

Presenter : Kawasaki N., Kushairi M.R.M., Nagao N., Yusoff F., Imai A., Kohzu A.
Title : , International Journal of Environmental Science and Development, 7(2):113-116 (2016)
Original Paper

Seasonal Changes of Nutrient Distributions along Selangor River, Malaysia

Presenter : Kawasaki N., Kushairi M.R.M., Nagao N., Yusoff F., Imai A., Kohzu A.
Title : , Int, 3(1):113-116 (2016)
Original Paper

Distribution of gastropods in a tidal flat in association with digestive enzyme activities

Presenter : Liu W., Tanimura A., Imai T., Kanaya G., Niiyama T., Maegawa S., Kohzu A., Kimura T., Toyohara H.
Title : , Plankton and Benthos Research, 9(3):156-167 (2014)
Original Paper

Temporal changes in carbon and nitrogen stable isotope ratios of macrozoobenthos on an artificial tidal flat facing a hypertrophic canal, inner Tokyo Bay

Presenter : Kanaya G., Nakamura Y., Koizumi T., Yamada K., Koshikawa H., Kohzu A., Maki H.
Title : , Marine Pollution Bulletin, 71:179-189 (2013)
Original Paper

Bacterial contribution to dissolved organic matter in eutrophic lake Kasumigaura, Japan

Presenter : Kawasaki N., Komatsu K., Kohzu A., Tomioka N., Shinohara R. , Satou T., Nara Watanabe F., Tada Y., Hamasaki K., Kushairi M. R. M., Imai A.
Title : , Applied and Environmental Microbiology, 79(23):7160-7168 (2013)
Original Paper

Biogenic Phosphorus Compounds in Sediment and Suspended Particles in a Shallow Eutrophic Lake: A 31P-Nuclear Magnetic Resonance (31P NMR) Study

Presenter : Shinohara R. , Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sano T., Satou T., Tomioka N.
Title : , Environmental Science & Technology, 46(19):10572-10578 (2012)
Original Paper

Direct evidence for nitrogen isotope discrimination during sedimentation and early diagenesis in Lake Kasumigaura, Japan

Presenter : Kohzu A., Imai A., Miyajima T., Fukushima T., Matsushige K., Komatsu K., Kawasaki N., Miura S., Satou T.
Title : , Org.Geochem., 42(2):173-183 (2011)
Original Paper

Evaluation of wastewater nitrogen transformation in a natural wetland (Ulaanbaatar, Mongolia) using dual-isotope analysis of nitrate

Presenter : Itoh M., Takemon Y., Makabe A., Yoshimizu C., Kohzu A., Ohte N., Tumurskh D., Tayasu I., Yoshida N., Nagata T.
Title : , Sci.Total Environ., 409(8):1530-1538 (2011)
Other Publications

Variation in nitrogen isotopic composition in the Selenga river watershed, Mongolia

Presenter : Hyodo F., Nishikawa J., Kohzu A., Fujita N., Saizen I., Tsogtbaatar J., Javzan C., Enkhtuya M., Gantomor D., Amartuvshin, Ishii R., Wada E.
Title : , Limnology (2011)
Original Paper

Fast and precise method for HPLC-size exclusion chromatography with UV and TOC (NDIR) detection: Importance of multiple detectors to evaluate the characteristics of dissolved ortanic matter

Presenter : Kawasaki N., Matsushige K., Komatsu K., Kohzu A., Nara F.W., Ogishi F., Yahata M., Mikami H., Goto T., Imai A.
Title : , Water Research, 45:6240-6248 (2011)
Original Paper

Direct evidence for the alteration of 13C natural abundances during early diagenesis in Lake Kasumigaura, Japan

Presenter : Kohzu A., Imai A., Ohkouchi N., Fukushima T., Kamiya K., Komatsu K., Tomioka N., Kawasaki N., Miura S., Satou T.
Title : , Geochemistry Geophysics Geosystems, 12(10): (2011)
Book

Application of stable isotope analysis to fungal ecology

Presenter : Kohzu A.
Title : , Earth, Life, and Isotopes (2010)
Original Paper

Longitudinal changes in bacterial community composition in river epilithic biofilms: influence of nutrients and organic matter

Presenter : Kobayashi Y., Kim C., Yoshimizu C., Kohzu A., Tayasu I., Nagata T.
Title : , Aquat.Microb.Ecol., 54(2):135-152 (2009)
Original Paper

Food webs in Mongolian grasslands: The analysis of (13)C and (15)N natural abundances

Presenter : Kohzu A., Iwata T., Kato M., Nishikawa J., Wada E., Amartuvshin N., Namkhaidorj B., Fujita N.
Title : , Isot.Environ.Health Stud., 45(3):208-219 (2009)

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Spatial variation of multifunctionality among abandoned rice paddies and irrigation ponds: potential roles of hydrological and environmental factors

Presenter : Matsuzaki S., Kohzu A., Watanabe M., Nakanishi K., Tsuchiya K., Kondo N., Sueyoshi M.
Title : , Restoration Ecology, 33(8):e70161 (2026)
Spatial, temporal, and biotic changes in the natural abundances of stable carbon and nitrogen isotopes in a biological treatment reactor

Presenter : Onodera T., Kubota K., Iguchi A., Nagamachi A., Tagawa T., Kanaya G., Kohzu A., Syutsubo K.
Title : , Journal of Bioscience and Bioengineering, 141(2):135-141 (2026)
Effects of winter heatwaves on carbon dioxide and methane emissions from shallow lakes: A temperature-controlled mesocosm study

Presenter : Tang H., Zhao X., Deng J., Qiu B., Yang Y., Nakano S., Matsuzaki S., Shinohara R., Kohzu A., Tsuchiya K.
Title : , Journal of Hydrology, 665(134704): (2026)
Diel temperature patterns unveiled: High-frequency monitoring and deep learning in Lake Kasumigaura

Presenter : Zhu S., Shinohara R., Matsuzaki S., Kohzu A., Watanabe Mirai., Nakagawa M., Nunno F.D. , Sun J., Zhou Q., Granata F.
Title : , Ecological Indicators, 169:112958 (2025)
Identification of wastewater-specific peak on EEM and their application for detecting the effluent in the discharged area

Presenter : Komatsu K., Onodera T., Tsuchiya K., Kohzu A., Syutsubo K.
Title : , Water Research, 275(123213): (2025)
Relationship between nitrogen removal and habitat provisioning functions of small wetlands originated from abandoned paddy fields: multisite comparison and experimental verification

Presenter : Kato H., Kohzu A., Nishihiro J.
Title : , Landscape and Ecological Engineering , 21:163-174 (2025)
Does nitrate suppress phosphorus release from sediment? A case study in Lake Kasumigaura, Japan

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Hydrology: Regional Studies, 58:102233 (2025)
Estimating internal dissolved methane loading in rivers using a mass balance approach

Presenter : Tsuchiya K., Miura S., Kohzu A.
Title : , PeerJ, 13(e20238): (2025)
Diazotrophic nitrogen fixation through aerial roots occurs in Avicennia marina: implications for adaptation of mangrove plant growth to low-nitrogen tidal flats.

Presenter : Inoue T., Kohzu A., Akaji Y., Miura S., Baba S.
Title : , New Phytologist, 241:1464-1475 (2024)
Vertical eDNA distribution of cold-water fishes in response to environmental variables in stratified lake

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Title : , Ecology and Evolution, 14(3):e11091-e11091 (2024)
Relationship between fish traits and the methane-derived carbon contribution to fish in a shallow lake

Presenter : Tsuchiya K., Matsuzaki S., Kohzu A.
Title : , Freshwater Biology, 69(10):1468-1478 (2024)
Water-level drawdowns can improve surface water quality and alleviate bottom hypoxia in shallow, eutrophic water bodies

Presenter : Matsuzaki S., Kohzu A., Tsuchiya K., Shinohara R., Nakagawa M., Fukumori K., Yamaguchi H., Kondo N., Kadoya T.
Title : , Freshwater Biology, 68(2):229-244 (2023)
Heat Waves Can Cause Hypoxia in Shallow Lakes

Presenter : Shinohara R., Matsuzaki S., Watanabe Mirai., Nakagawa M., Yoshida H., Kohzu A.
Title : , Geophysical Research Letters, 50(8): (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

Presenter : Kohzu A., Matsuzaki S., Komuro S., Komatsu K., Takamura N., Nakagawa M., Imai A., Fukushima T.
Title : , Science of the Total Environment, 881:163097 (2023)
Use of legacy nitrogen as a resource: Unfertilized lotus fields contribute to water quality improvement and biodiversity conservation

Presenter : Matsuzaki S., Kohzu A., Watanabe Mirai., Kondo N., Tatsuta A.
Title : , Nature-Based Solutions, 4(100080): (2023)
Horizontal variability and regulation of bacterial production in Lake Biwa, Japan.

Presenter : Tsuchiya K., Tomioka N., Komatsu K., Sano T., Kohzu A., Imai A., Hayakawa K., Nagata T., Okamoto T., Ohara T.
Title : , Limnology, 23:231-243 (2022)
Inferring causal impacts of extreme water-level drawdowns on lake water clarity using long-term monitoring data

Presenter : Nakanishi K., Yokomizo H., Fukaya K., Kadoya T., Matsuzaki S., Nishihiro J., Kohzu A., Hayashi T.
Title : , Science of The Total Environment, 838(2): (2022)
Relationship between plant growth and soil chemical properties in a mangrove afforestation stand, Kiribati

Presenter : Inoue T., Akaji Y., Kohzu A., Hinokidani K., Adachi H., Kezuka M, Baba S.
Title : , Plant and Soil (2022)
Does increased springtime solar radiation also increase primary production?

Presenter : Shinohara R., Matsuzaki S., Nakagawa M., Tsuchiya K., Kohzu A.
Title : , Journal of Plankton Research, 44(4):497-507 (2022)
The composition of organic phosphorus in a river during the springtime irrigation period

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Hydrology: Regional Studies, 44:101238 (2022)
Evaluation of stable isotope ratios (δ15N and δ18O) of nitrate in advanced sewage treatment processes: isotopic signature in four process types

Presenter : Onodera T., Komatsu K., Kohzu A., Kanaya G., Mizuochi M., Syutsubo K.
Title : , Science of the Total Environment, 762(144120): (2021)
Seasonal dynamics of the activities of dissolved 137Cs and the 137Cs of fish in a shallow, hypereutrophic lake: Links to bottom-water oxygen concentrations

Presenter : Matsuzaki S., Tanaka A., Kohzu A., Suzuki K., Komatsu K., Shinohara R., Nakagawa M., Nohara S., Ueno R., Satake K., Hayashi S.
Title : , Science of The Total Environment, 761:143257 (2021)
Development of a new high-throughput and small-size method for measuring sediment oxygen demand in lakes.

Presenter : Shimotori K., Yamamoto H., Imai A., Kohzu A., Okamoto T.
Title : , Journal of Soils and Sediments, 21:1222-1231 (2021)
Differences in the isotopic signature of activated sludge in four types of advanced treatment processes at a municipal wastewater treatment plant

Presenter : Onodera T., Komatsu K., Kohzu A., Kanaya G., Mizuochi M., Syutsubo K.
Title : , Journal of Environmental Management, 286(112264): (2021)
Patterns of CO2 concentration and inorganic carbon limitation of phytoplankton biomass in agriculturally eutrophic lakes

Presenter : Zagarese H.E., González Sagrario, M.A., Wolf-Gladrow D., Nõges P., Nõges T., Kangur K., Matsuzaki S., Kohzu A., Vanni M.J., Özkundakci D., Echaniz S.A., Vignatti A., Grosman F., Sanzano P., Van Dam B., Knoll L.B.
Title : , Water Research, 190(15):116715 (2021)
Differences in regulation of planktonic and epilithic biofilm bacterial production in the middle reaches of a temperate river

Presenter : Tsuchiya K., Kohzu A., Kuwahara V.S., Matsuzaki S., Denda M., Hirabayashi K.
Title : , Aquatic Microbial Ecology, 87:47-60 (2021)
Warming of water temperature in spring and nutrient release from sediment in a shallow eutrophic lake

Presenter : Shinohara R., Tsuchiya K., Kohzu A.
Title : , Journal of Water and Climate Change, 12(7):3187 (2021)
Distribution in natural abundances of stable isotopes of nitrate and retained sludge in a nitrifying bioreactor: Drastic changes in isotopic signatures

Presenter : Onodera T., Kanaya G., Kohzu A., Syutsubo K.
Title : , Science of the Total Environment, 705(134438): (2020)
Characterization of dissolved organic matter in wastewater during aerobic, anaerobic, and anoxic treatment processes by molecular size and fluorescence analyses

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Title : , Water Research, 171: (2020)
Incorporation characteristics of exogenous 15N-labeled thymidine, deoxyadenosine, deoxyguanosine and deoxycytidine into bacterial DNA

Presenter : Tsuchiya K., Sano T., Tomioka N., Kohzu A., Komatsu K., Shinohara R., Shimode S., Toda T., Imai A.
Title : , PLoS ONE, 15(2)(e0229740): (2020)
Effects of downwash during unmanned aircraft system-assisted water sampling on water mass structure directly below the UAS

Presenter : Miura S., Kohzu A.
Title : , Limnology and Oceanography: Methods (2020)
Magnetic Resonance Imaging as a Novel Method for Elucidating Sediment Burrow Structures and Functions

Presenter : Kohzu A., Watanabe H., Imai A., Takaya N., Miura S., Shimotori K., Komatsu K.
Title : , ACS OMEGA, 5(25):14933-14941 (2020)
Variability of benthic methane-derived carbon along seasonal, biological, and sedimentary gradients in a polymictic lake

Presenter : Tsuchiya K., Komatsu K., Shinohara R., Imai A., Matsuzaki S., Ueno R., Kuwahara V.S., Kohzu A.
Title : , Limnology and Oceanography (2020)
Novel method for measuring aquatic bacterial productivity using D10-leucine based on protein synthesis rate

Presenter : Tsuchiya K., Sano T., Tomioka N., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Kuwahara V. S., Kohzu A.
Title : , Aquatic Microbial Ecology, 85:121-129 (2020)
Vertical/spatial movement and accumulation of 137Cs in a shallow lake in the initial phase after the Fukushima Daiichi nuclear power plant accident

Presenter : Tsuji H., Tanaka A., Komatsu K., Kohzu A., Matsuzaki S., Hayashi S.
Title : , Applied Radiation and Isotopes (2019)
Long-term observations of the vertical distributions of mineral elements and phosphorus dynamics in sediments in a shallow eutrophic lake in Japan

Presenter : Shimotori K., Imai A., Kohzu A., Komatsu K., Koshikawa-K.M., Hayashi S., Watanabe Mirai.
Title : , Journal of Soils and Sediments, 19(3):1566-1575 (2019)
Vertical variation of bulk and metabolically active prokaryotic community in sediment of a hypereutrophic freshwater lake

Presenter : Tsuboi S., Kohzu A., Imai A., Iwasaki K., Yamamura S.
Title : , Environmental Science and Pollution Research, 26:9379-9389 (2019)
Seasonal variability and regulation of bacterial production in a shallow eutrophic lake

Presenter : Tsuchiya K., Sano T., Tomioka N., Kohzu A., Komatsu K., Shinohara R., Takamura N., Nakagawa M., Sugai Y., Kuwahara V. S. , Toda T., Fukuda H., Imai A.
Title : , Limnology and Oceanography (2019)
Decrease in bacterial production over the past three decades in the north basin of Lake Biwa, Japan

Presenter : Tsuchiya K., Tomioka N., Sano T., Kohzu A., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Hirose Y.
Title : , Limnology (2019)
Tracking the route of atmospheric nitrogen to diazotrophs colonizing buried mangrove roots

Presenter : Inoue T., Kohzu A., Shimono A.
Title : , Tree Physiology (2019)
Role of wetlands in mitigating the tradeoff between crop production and water quality in agricultural landscapes

Presenter : Matsuzaki S., Kohzu A., Kadoya T., Watanabe Mirai., Osawa T., Komatsu K., Kondo N., Yamaguchi H., Ando H., Shimotori K., Fukaya K., Nakagawa M., Kizuka T., Yoshioka A., Sasai T., Saigusa N., Matsushita B., Takamura N.
Title : , Ecosphere, 10(11):e02918 (2019)
Coniferous coverage as well as catchment steepness influences local stream nitrate concentrations within a nitrogen-saturated forest in central Japan

Presenter : Watanabe Mirai., Miura S., Hasegawa S., Koshikawa-K.M., Takamatsu T., Kohzu A., Imai A.
Title : , Science of the Total Environment, 636:539-546 (2018)
Evaluation of trophic transfer in the microbial food web during sludge degradation based on 13C and 15N natural abundance

Presenter : Onodera T., Kanaya G., Hatamoto M., Kohzu A., Iguchi A., Takimoto Y., Yamaguchi T., Mizuochi M., Syutsubo K.
Title : , Water Research, 146:30-36 (2018)
Effects of macrophyte harvesting on the water quality and bottom environment of Lake Biwa,Japan

Presenter : Kohzu A., Shimotori K., Imai A.
Title : , Limnology (2018)
Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study

Presenter : Shinohara R., Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Title : , Limnology, 18(1):141-151 (2017)
Role of organic phosphorus in sediment in a shallow eutrophic lake

Presenter : Shinohara R., Hiroki M., Kohzu A., Imai A., Inoue T., Furusato E., Komatsu K., Sato T., Tomioka N., Shimotori K., Miura S.
Title : , Water Resources Research, 53:7175-7189 (2017)
Dynamics of particulate phosphorus in a shallow eutrophic lake

Presenter : Shinohara R., Imai A., Kohzu A., Tomioka N., Furusato E., Sato T., Sano T., Komatsu K., Miura S., Shimotori K.
Title : , Science of the Total Environment, 563-564(1):413-423 (2016)
Microbial nitrification in throughfall of a Japanese cedar associated with archaea from the tree canopy

Presenter : Watanabe K., Kohzu A., Suda W., Yamamura S., Takamatsu T., Takenaka A., Koshikawa-K.M., Hayashi S., Watanabe Mirai.
Title : , SpringerPlus, 5(1596): (2016)
Quantification and characterization of coastal dissolved organic matter by high-performance size exclusion chromatography with ultraviolet absorption, fluorescence, and total organic carbon analyses

Presenter : Shimotori K., Satou T., Imai A., Kawasaki N., Komatsu K., Kohzu A., Tomioka N., Shinohara R., Miura S.
Title : , Limnology and Oceanography: Methods, 14(10):637-648 (2016)
Release of Nitrogen and Phosphorus from Aquaculture Farms to Selangor River, Malaysia

Presenter : Kawasaki N., Kushairi M.R.M., Nagao N., Yusoff F., Imai A., Kohzu A.
Title : , International Journal of Environmental Science and Development, 7(2):113-116 (2016)
Seasonal Changes of Nutrient Distributions along Selangor River, Malaysia

Presenter : Kawasaki N., Kushairi M.R.M., Nagao N., Yusoff F., Imai A., Kohzu A.
Title : , Int, 3(1):113-116 (2016)
Distribution of gastropods in a tidal flat in association with digestive enzyme activities

Presenter : Liu W., Tanimura A., Imai T., Kanaya G., Niiyama T., Maegawa S., Kohzu A., Kimura T., Toyohara H.
Title : , Plankton and Benthos Research, 9(3):156-167 (2014)
Temporal changes in carbon and nitrogen stable isotope ratios of macrozoobenthos on an artificial tidal flat facing a hypertrophic canal, inner Tokyo Bay

Presenter : Kanaya G., Nakamura Y., Koizumi T., Yamada K., Koshikawa H., Kohzu A., Maki H.
Title : , Marine Pollution Bulletin, 71:179-189 (2013)
Bacterial contribution to dissolved organic matter in eutrophic lake Kasumigaura, Japan

Presenter : Kawasaki N., Komatsu K., Kohzu A., Tomioka N., Shinohara R. , Satou T., Nara Watanabe F., Tada Y., Hamasaki K., Kushairi M. R. M., Imai A.
Title : , Applied and Environmental Microbiology, 79(23):7160-7168 (2013)
Biogenic Phosphorus Compounds in Sediment and Suspended Particles in a Shallow Eutrophic Lake: A 31P-Nuclear Magnetic Resonance (31P NMR) Study

Presenter : Shinohara R. , Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sano T., Satou T., Tomioka N.
Title : , Environmental Science & Technology, 46(19):10572-10578 (2012)
Direct evidence for nitrogen isotope discrimination during sedimentation and early diagenesis in Lake Kasumigaura, Japan

Presenter : Kohzu A., Imai A., Miyajima T., Fukushima T., Matsushige K., Komatsu K., Kawasaki N., Miura S., Satou T.
Title : , Org.Geochem., 42(2):173-183 (2011)
Evaluation of wastewater nitrogen transformation in a natural wetland (Ulaanbaatar, Mongolia) using dual-isotope analysis of nitrate

Presenter : Itoh M., Takemon Y., Makabe A., Yoshimizu C., Kohzu A., Ohte N., Tumurskh D., Tayasu I., Yoshida N., Nagata T.
Title : , Sci.Total Environ., 409(8):1530-1538 (2011)
Fast and precise method for HPLC-size exclusion chromatography with UV and TOC (NDIR) detection: Importance of multiple detectors to evaluate the characteristics of dissolved ortanic matter

Presenter : Kawasaki N., Matsushige K., Komatsu K., Kohzu A., Nara F.W., Ogishi F., Yahata M., Mikami H., Goto T., Imai A.
Title : , Water Research, 45:6240-6248 (2011)
Direct evidence for the alteration of 13C natural abundances during early diagenesis in Lake Kasumigaura, Japan

Presenter : Kohzu A., Imai A., Ohkouchi N., Fukushima T., Kamiya K., Komatsu K., Tomioka N., Kawasaki N., Miura S., Satou T.
Title : , Geochemistry Geophysics Geosystems, 12(10): (2011)
Longitudinal changes in bacterial community composition in river epilithic biofilms: influence of nutrients and organic matter

Presenter : Kobayashi Y., Kim C., Yoshimizu C., Kohzu A., Tayasu I., Nagata T.
Title : , Aquat.Microb.Ecol., 54(2):135-152 (2009)
Food webs in Mongolian grasslands: The analysis of (13)C and (15)N natural abundances

Presenter : Kohzu A., Iwata T., Kato M., Nishikawa J., Wada E., Amartuvshin N., Namkhaidorj B., Fujita N.
Title : , Isot.Environ.Health Stud., 45(3):208-219 (2009)

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Chapter 8 The Advancement of Climate Change Impact Assessment Methodology Project at National Institute for Environmental Studies

Presenter : Hanasaki N., Okada M., Ishizaki N., Masutomi Y., Inoue T., Wang Q-X., Koide D., Kohzu A., Kumagai N., Higashi H., Oka K., Ishihama F., Hayashi S.
Title : , Climate Change Impacts and Adaptation Strategies in Japan (2025)
Mangroves of Japan

Presenter : Inoue T., Kohzu A., Akaji Y., Miura S., Baba S.
Title : , A book on Mangroves: Biodiversity, livelihoods and conservation (2022)
Inflow/Outflow of Radiocesium in a Dam Lake and Its Accumulation in Sediments

Presenter : Tsuji H., Kohzu A., Sato T., Hayashi S.
Title : , Impacts of Fukushima Nuclear Accident on Freshwater Environments (2021)
Application of stable isotope analysis to fungal ecology

Presenter : Kohzu A.
Title : , Earth, Life, and Isotopes (2010)

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Bruguiera gymnorhiza forms mycorrhizal associations but Rhizophora stylosa does not: A pot experiment using mangrove soil and Rhizophoraceae seedlings

Presenter : Akaji Y., Inoue T., Kohzu A., Taniguchi T., Baba S.
Title : , Aquatic Botany, 192:103748 (2024)
Variation in nitrogen isotopic composition in the Selenga river watershed, Mongolia

Presenter : Hyodo F., Nishikawa J., Kohzu A., Fujita N., Saizen I., Tsogtbaatar J., Javzan C., Enkhtuya M., Gantomor D., Amartuvshin, Ishii R., Wada E.
Title : , Limnology (2011)

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Research Result (Presentation)

Research Presentation

Estimation of methane loading from riverbed

Presenter : Tsuchiya K., Kohzu A., Miura S.
Name of Society : The 19th International Symposium on River and Lake Environment (ISRLE 19) (2024)
Name of Proceedings : Abstract, 95
Research Presentation

Vertical distribution of two salmonid species in response to water temperature and hypoxia

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Name of Society : The 2023 conference of the Ecological Society of Australia (2023)
Name of Proceedings : -
Research Presentation

Estimation of internal methane loading in river

Presenter : Tsuchiya K., Kohzu A., Miura S.
Name of Society : Freshwater Sciences 2023 (2023)
Name of Proceedings : Abstracts
Research Presentation

Differences in vertical distribution of two salmonid species: the impacts of warm water temperature and hypoxia in a stratified lake

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Name of Society : The eDNA Society International Meeting 2023 (2023)
Name of Proceedings : -
Research Presentation

Substantial decrease in bacterial production over the past three decades in the north basin of Lake Biwa, Japan

Presenter : Tsuchiya K., Tomioka N., Sano T., Kohzu A., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Hirose Y.
Name of Society : 35th Congress of the International Society of Limnology (SIL2021) (2021)
Name of Proceedings : Abstracts, (210058)
Research Presentation

Restored wetlands from abandoned-paddy can contribute to the climate change adaptation: conceptual study and some evidences from watershed

Presenter : Nishihiro J., Kato H., Ohtsuki K., Kohzu A.
Name of Society : 2019 Society of Wetland Scientists-Asia Chapter and Korean Wetland Society Joint Meeting (2019)
Name of Proceedings : Abstract "2019 Society of Wetland Scientists-Asia Chapter and Korean Wetland Society Joint Meeting"
Research Presentation

Spatial variations in contributions of methane-derived carbon to chironomid larvae and oligochaeta in a shallow, eutrophic Lake Kasumigaura, Japan

Presenter : Tsuchiya K., Komatsu K., Shinohara R., Imai A., Matsuzaki S., Kohzu A.
Name of Society : ASLO 2019 Aquatic Sciences Meeting (2019)
Name of Proceedings : Abstracts, 75
Research Presentation

Sediment microbial Fuel Cells Suppressed Phosphorus release from Eutrophic Lake Bottom

Presenter : Takemura Y., Kohzu A., Kubota K., Watanabe T., Syutsubo K.
Name of Society : MEWE2019 (2019)
Name of Proceedings : 8th IWA Microbial Ecology and Water Engineering Specialist conference Abstract Book, 242-243
Research Presentation

Changes in Characteristics of NOM During Wastewater Treatment Processes

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Name of Society : IWA Specialist Conference on Natural Organic Matter in Water 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation

Quantification and characterization of dissolved organic matter in natural environments by size exclusion chromatography with total organic carbon detector

Presenter : Shimotori K., Imai A., Sato T., Komatsu K., Kohzu A., Kawasaki N.
Name of Society : NOM7 IWA Specialist Conference on Natural Organic Matter 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation

Sediment microbial fuel cells (SMFC) applied for suppresion of P release from the lade sediment

Presenter : Takemura Y., Kohzu A., Kubota K., Watanabe T., Syutsubo K.
Name of Society : ISMET7 International Society for Microbial Electrochemistry and Technology Global Conference (2019)
Name of Proceedings : Abstracts, 113
Research Presentation

Changes of nutrient in sediment pore water by sediment microbial fuel cell and evaluation of these influence range around anode

Presenter : Kubota K., Shibata Y., Takemura Y., Watanabe T., Kohzu A., Syutsubo K.
Name of Society : ISMET7 International Society for Microbial Electrochemistry and Technology Global Conference (2019)
Name of Proceedings : Abstracts, 128
Research Presentation

What the monitoring data in Lake Kasumigaura tell us

Presenter : Komatsu K., Kohzu A., Matsuzaki S., Nakagawa M., Tomioka N., Ueno R., Shinohara R., Tsuchiya K.
Name of Society : 17th World Lake Conference (2018)
Name of Proceedings : Abstracts, 88-90
Research Presentation

Application of EEM-PARAFAC for characterizing dissolved organic matter in a wastewater treatment plant having four types of advanced treatment processes

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Name of Society : International Workshop on Organic Matter Spectroscopy 2018 (2018)
Name of Proceedings : Abstracts
Research Presentation

Bacterial production and carbon budget at the center of Lake Kasumigaura, Japan

Presenter : Tsuchiya K., Sano T., Tomioka N., Takamura N., Nakagawa M., Kohzu A., Komatsu K., Shinohara R., Imai A.
Name of Society : 17th World Lake Conference (2018)
Name of Proceedings : Proceedings, 74-75
Research Presentation

Characterization of dissolved organic matter (DOM) during the processes of advanced wastewater treatment plant and evaluation of the effect of its effluent on river water quality

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A., Kawasaki N.
Name of Society : 7th IWA-ASPIRE Conference 2017 (2017)
Name of Proceedings : Abstracts, 20
Research Presentation

Analysis of phosphorus compounds by using 2D(1 H 31 P)-nuclear magnetic resonance (NMR) spectroscopy in an oligotrophic environment

Presenter : Shinohara R., Tomoya Iwata, Yoshiki Ikarashi, Sano T., Kohzu A.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Research Presentation

Long-term monitoring of Lake Kasumigaura, Japan: a 40 year legacy and looking to the future

Presenter : Matsuzaki S., Komatsu K., Kohzu A., Tomioka N., Shinohara R., Shimotori K., Ueno R., Kondo N., Yamaguchi H., Kadoya T., Ando H., Nakagawa M., Totsu K., Imai A., Takamura N.
Name of Society : Global Lake Ecological Observatory Network (GLEON) 19 (2017)
Name of Proceedings : Abstracts
Research Presentation

Estimation of primary production in Lake Kasumigaura by using in situ measurement by fast repetition rate fluorometry (FRRF)

Presenter : Komatsu K., Imai A., Tomioka N., Takamura N., Nakagawa M., Sato T., Shimotori K., Kohzu A., Shinohara R.
Name of Society : SIL XXXIII Congress (2016)
Name of Proceedings : Abstracts, 107-108
Research Presentation

Comparison n nutrient and mineral elution between sediment covered with and without macrophyte litter in Lake Biwa, Japan

Presenter : Kohzu A., Imai A., Shimotori K., Sato T., Ishikawa K., Komatsu K., Ban S.
Name of Society : SIL2016 (2016)
Name of Proceedings : Abstracts, 381-382
Research Presentation

Characterization of extracellular dissolved organic matter released by cyanobacteria dominant in a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kawasaki N., Kohzu A., Shimotori K.
Name of Society : SIL XXXIII Congress (2016)
Name of Proceedings : Book of Abstracts, 111-112
Research Lecture

Long-term changes in nitrogen cycles, water quality and isotopic composition in Lake Kasumigaura, Japan

Presenter : Kohzu A., Komatsu K., Imai A.
Name of Society : ILTER-Nitrogen Initiative International Training Course (2016)
Name of Proceedings : Abstracts
Research Presentation

Dynamics of Phosphorus in suspended particles in a shallow eutrophic lake: a 31P NMR study

Presenter : Shinohara R., Imai A., Kohzu A., Tomioka N., Furusato E., Sato T., Sano T., Komatsu K., Miura S., Shimotori K.
Name of Society : American Geophysical Union Fall Meeting 2016 (2016)
Name of Proceedings : -
Research Presentation

Phosphorus (P) speciation in aquatic macrophytes around Lake Kasumigaura: A 31P NMR study.

Presenter : Shinohara R., Imai A., Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Name of Society : Water and Environment Technology Conference 2015 (2015)
Name of Proceedings : WET2015, 43
Research Presentation

Temporal and Vertical Changes in Sediment P Compounds in Lake Kasumigaura, Japan - A31 P Nuclear Magnetic Resonance Spectroscopy Study

Presenter : Shinohara R., Imai A., Kawasaki, Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Name of Society : Joint Aquatic Sciences Meeting 2014 (2014)
Name of Proceedings : -
Research Presentation

Characterization of DOM in shallow and deep lakes in Japan by using EEM-PARAFAC

Presenter : Komatsu K., Imai A., Shimotori K., Sato T., Shinohara R., Kohzu A., Tomioka N.
Name of Society : 8th Shallow Lakes Conference (2014)
Name of Proceedings : Abstracts, 145
Research Presentation

Long-term trends in dissolved organic matter, phosphorus and nitrogen in sediment porewater of the shallow eutrophic Lake Kasumigaura, Japan

Presenter : Imai A., Komatsu K., Sato T., Kohzu A., Shinohara R., Tomioka N., Shimotori K.
Name of Society : 8th Shallow Lakes Conference (2014)
Name of Proceedings : Abstracts, 192
Research Presentation

Comparison based on concentration, d15N, and d18O of nitrate to analyze run-off nitrate discharge processes different between two mountain streams around Mt. Tsukuba, Japan

Presenter : Kohzu A., Watanabe Mirai., Hayashi S., Miura S., Imai A.
Name of Society : 3rd International Conference on Nitrification (ICoN3) (2013)
Name of Proceedings : Abstracts, 73-73
Research Presentation

Characterization of dissolved organic matter in sediment porewater of a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kohzu A., Shinohara R.
Name of Society : 32nd Congress of the International Society of Limnology (2013)
Name of Proceedings : Abstracts, 190
Research Presentation

Characterization of dissolved organic matter released by cyanobacteria dominant in a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kawasaki N., Tomioka N., Kohzu A., Shinohara R.
Name of Society : 2013 International Environmental Engineering Conference and Annual Meeting of the Korean Society of Environmental Engineers (IEEC2013) (2013)
Name of Proceedings : -, 43
Research Presentation

Bacterial contribution of organic matter to aquatic environments

Presenter : Imai A., Kawasaki N., Komatsu K., Kohzu A., Sato T., Hamasaki K., Tada Y., Kushairi M.R.
Name of Society : 2012 ASLO Aquatic Sciences Meeting (2012)
Name of Proceedings : -
Research Presentation

Phosphorus compounds of suspended particles and sediment in Lake Kasumigaura —A 31P NMR study

Presenter : Shinohara R. , Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sato T., Tomioka N.
Name of Society : 2012 ASLO Aquatic Sciences Meeting (2012)
Name of Proceedings : Abstracts
Research Presentation

Metabolism in forest ecosystems from the analysis of nitrate 15N and 18O natural abundances in mountaion streams around Mt. Tsukuba, Japan

Presenter : Kohzu A., Watanabe Mirai., Hayashi S., Imai A., Nakajima Y., Osaka K., Miura S.
Name of Society : Voyages of Discovery (2012)
Name of Proceedings : Abstracts, 65
Research Lecture

Studies of material cycling within lotic and lentic ecosystems by nitrate isotopic analysis

Presenter : Kohzu A.
Name of Society : UY-GCOE Mini Seminar“Frontier and future of isotope science for assessing river basin environment” (2011)
Name of Proceedings : -
Research Presentation

The introduction of the denitrifier method for the analysis of nitrate delta15N and delta18O and their variation in the surface water of Lake Kasumigaura from 2000 to 2005

Presenter : Kohzu A., Imai A., Nakajima Y., Osaka K., Komatsu K., Kawasaki N., Miura S., Sato T.
Name of Society : The 4th IWA-ASPIRE Conference & Exhibition (2011)
Name of Proceedings : Abstract of The 4th IWA-ASPIRE Conference & Exhibition Toward sustainable water supply and recycling systems, 256
Research Presentation

Distribution Patterns of Dissloved Carbohydrates in Eutrophic Lake Kasumigaura

Presenter : Sato T., Kawasaki N., Komatsu K., Imai A., Kohzu A., Miura S.
Name of Society : The 4th IWA-ASPIRE Conference and Exhibition Toward sustainable water supply and recycling systems (2011)
Name of Proceedings : Abstract of The 4th IWA-ASPIRE Conference and Exhibition Toward sustainable water supply and recycling systems, 466
Research Presentation

Characterization of dissolved organic matter in water reclamation process

Presenter : Komatsu K., Imai A., Yonekawa H., Hashimoto T., Kawasaki N., Sato T., Kohzu A.
Name of Society : The 4th IWA-ASPIRE Conference and exhibition (2011)
Name of Proceedings : Abstracts, 192-193
Research Presentation

Seasonal changes of dissolved organic matter properties in Lake Kasumigaura and its sediment pore water using size-exclusion chromatography with both UV and TOC detectors

Presenter : Kawasaki N., Imai A., Komatsu K., Kohzu A., Sato T., Miura S.
Name of Society : The 4th IWA-ASPIRE Conference and exhibition (2011)
Name of Proceedings : Abstracts of The 4th IWA-ASPIRE Conference and exhibition, 120-121
Research Presentation

Historical change in nitrogen isotope ratios of sediments in Lake Kasumigaura during 1979-2007

Presenter : Kohzu A., Imai A., Matsushige K., Kazuhiro K., Kawasaki N., Fukushima T.
Name of Society : 7th Int.Symp.Subsurface Microbiol. (2008)
Name of Proceedings : Abstracts, 93
Research Presentation

Spatial distribution patterns of allochtonous and autochtonous benthic particulate organic matter on the riverbed of a mountain stream in Kyoto, Japan

Presenter : Takemon Y., Imai Y., Kohzu A., Nagata T., Ikebuchi S.
Name of Society : Water Down Under 2008 (2008)
Name of Proceedings : Abstracts, 2393-2403

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Estimation of internal methane loading in river

Presenter : Tsuchiya K., Kohzu A., Miura S.
Name of Society : Freshwater Sciences 2023 (2023)
Name of Proceedings : Abstracts
Substantial decrease in bacterial production over the past three decades in the north basin of Lake Biwa, Japan

Presenter : Tsuchiya K., Tomioka N., Sano T., Kohzu A., Komatsu K., Imai A., Hayakawa K., Nagata T., Okamoto T., Hirose Y.
Name of Society : 35th Congress of the International Society of Limnology (SIL2021) (2021)
Name of Proceedings : Abstracts, (210058)
Changes in Characteristics of NOM During Wastewater Treatment Processes

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Name of Society : IWA Specialist Conference on Natural Organic Matter in Water 2019 (2019)
Name of Proceedings : Abstracts
Application of EEM-PARAFAC for characterizing dissolved organic matter in a wastewater treatment plant having four types of advanced treatment processes

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A.
Name of Society : International Workshop on Organic Matter Spectroscopy 2018 (2018)
Name of Proceedings : Abstracts
Characterization of dissolved organic matter (DOM) during the processes of advanced wastewater treatment plant and evaluation of the effect of its effluent on river water quality

Presenter : Komatsu K., Onodera T., Kohzu A., Syutsubo K., Imai A., Kawasaki N.
Name of Society : 7th IWA-ASPIRE Conference 2017 (2017)
Name of Proceedings : Abstracts, 20
Estimation of primary production in Lake Kasumigaura by using in situ measurement by fast repetition rate fluorometry (FRRF)

Presenter : Komatsu K., Imai A., Tomioka N., Takamura N., Nakagawa M., Sato T., Shimotori K., Kohzu A., Shinohara R.
Name of Society : SIL XXXIII Congress (2016)
Name of Proceedings : Abstracts, 107-108
Comparison n nutrient and mineral elution between sediment covered with and without macrophyte litter in Lake Biwa, Japan

Presenter : Kohzu A., Imai A., Shimotori K., Sato T., Ishikawa K., Komatsu K., Ban S.
Name of Society : SIL2016 (2016)
Name of Proceedings : Abstracts, 381-382
Characterization of extracellular dissolved organic matter released by cyanobacteria dominant in a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kawasaki N., Kohzu A., Shimotori K.
Name of Society : SIL XXXIII Congress (2016)
Name of Proceedings : Book of Abstracts, 111-112
Characterization of DOM in shallow and deep lakes in Japan by using EEM-PARAFAC

Presenter : Komatsu K., Imai A., Shimotori K., Sato T., Shinohara R., Kohzu A., Tomioka N.
Name of Society : 8th Shallow Lakes Conference (2014)
Name of Proceedings : Abstracts, 145
Characterization of dissolved organic matter in sediment porewater of a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kohzu A., Shinohara R.
Name of Society : 32nd Congress of the International Society of Limnology (2013)
Name of Proceedings : Abstracts, 190
Characterization of dissolved organic matter released by cyanobacteria dominant in a shallow eutrophic lake

Presenter : Imai A., Komatsu K., Sato T., Kawasaki N., Tomioka N., Kohzu A., Shinohara R.
Name of Society : 2013 International Environmental Engineering Conference and Annual Meeting of the Korean Society of Environmental Engineers (IEEC2013) (2013)
Name of Proceedings : -, 43
Bacterial contribution of organic matter to aquatic environments

Presenter : Imai A., Kawasaki N., Komatsu K., Kohzu A., Sato T., Hamasaki K., Tada Y., Kushairi M.R.
Name of Society : 2012 ASLO Aquatic Sciences Meeting (2012)
Name of Proceedings : -
Phosphorus compounds of suspended particles and sediment in Lake Kasumigaura —A 31P NMR study

Presenter : Shinohara R. , Imai A., Kawasaki N., Komatsu K., Kohzu A., Miura S., Sato T., Tomioka N.
Name of Society : 2012 ASLO Aquatic Sciences Meeting (2012)
Name of Proceedings : Abstracts
The introduction of the denitrifier method for the analysis of nitrate delta15N and delta18O and their variation in the surface water of Lake Kasumigaura from 2000 to 2005

Presenter : Kohzu A., Imai A., Nakajima Y., Osaka K., Komatsu K., Kawasaki N., Miura S., Sato T.
Name of Society : The 4th IWA-ASPIRE Conference & Exhibition (2011)
Name of Proceedings : Abstract of The 4th IWA-ASPIRE Conference & Exhibition Toward sustainable water supply and recycling systems, 256
Characterization of dissolved organic matter in water reclamation process

Presenter : Komatsu K., Imai A., Yonekawa H., Hashimoto T., Kawasaki N., Sato T., Kohzu A.
Name of Society : The 4th IWA-ASPIRE Conference and exhibition (2011)
Name of Proceedings : Abstracts, 192-193
Seasonal changes of dissolved organic matter properties in Lake Kasumigaura and its sediment pore water using size-exclusion chromatography with both UV and TOC detectors

Presenter : Kawasaki N., Imai A., Komatsu K., Kohzu A., Sato T., Miura S.
Name of Society : The 4th IWA-ASPIRE Conference and exhibition (2011)
Name of Proceedings : Abstracts of The 4th IWA-ASPIRE Conference and exhibition, 120-121
Spatial distribution patterns of allochtonous and autochtonous benthic particulate organic matter on the riverbed of a mountain stream in Kyoto, Japan

Presenter : Takemon Y., Imai Y., Kohzu A., Nagata T., Ikebuchi S.
Name of Society : Water Down Under 2008 (2008)
Name of Proceedings : Abstracts, 2393-2403
Estimation of methane loading from riverbed

Presenter : Tsuchiya K., Kohzu A., Miura S.
Name of Society : The 19th International Symposium on River and Lake Environment (ISRLE 19) (2024)
Name of Proceedings : Abstract, 95
Vertical distribution of two salmonid species in response to water temperature and hypoxia

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Name of Society : The 2023 conference of the Ecological Society of Australia (2023)
Name of Proceedings : -
Differences in vertical distribution of two salmonid species: the impacts of warm water temperature and hypoxia in a stratified lake

Presenter : Fukumori K., Kondo N., Kohzu A., Tsuchiya K., Ito H., Kadoya T.
Name of Society : The eDNA Society International Meeting 2023 (2023)
Name of Proceedings : -
Restored wetlands from abandoned-paddy can contribute to the climate change adaptation: conceptual study and some evidences from watershed

Presenter : Nishihiro J., Kato H., Ohtsuki K., Kohzu A.
Name of Society : 2019 Society of Wetland Scientists-Asia Chapter and Korean Wetland Society Joint Meeting (2019)
Name of Proceedings : Abstract "2019 Society of Wetland Scientists-Asia Chapter and Korean Wetland Society Joint Meeting"
Spatial variations in contributions of methane-derived carbon to chironomid larvae and oligochaeta in a shallow, eutrophic Lake Kasumigaura, Japan

Presenter : Tsuchiya K., Komatsu K., Shinohara R., Imai A., Matsuzaki S., Kohzu A.
Name of Society : ASLO 2019 Aquatic Sciences Meeting (2019)
Name of Proceedings : Abstracts, 75
Sediment microbial Fuel Cells Suppressed Phosphorus release from Eutrophic Lake Bottom

Presenter : Takemura Y., Kohzu A., Kubota K., Watanabe T., Syutsubo K.
Name of Society : MEWE2019 (2019)
Name of Proceedings : 8th IWA Microbial Ecology and Water Engineering Specialist conference Abstract Book, 242-243
Quantification and characterization of dissolved organic matter in natural environments by size exclusion chromatography with total organic carbon detector

Presenter : Shimotori K., Imai A., Sato T., Komatsu K., Kohzu A., Kawasaki N.
Name of Society : NOM7 IWA Specialist Conference on Natural Organic Matter 2019 (2019)
Name of Proceedings : Abstracts
Sediment microbial fuel cells (SMFC) applied for suppresion of P release from the lade sediment

Presenter : Takemura Y., Kohzu A., Kubota K., Watanabe T., Syutsubo K.
Name of Society : ISMET7 International Society for Microbial Electrochemistry and Technology Global Conference (2019)
Name of Proceedings : Abstracts, 113
Changes of nutrient in sediment pore water by sediment microbial fuel cell and evaluation of these influence range around anode

Presenter : Kubota K., Shibata Y., Takemura Y., Watanabe T., Kohzu A., Syutsubo K.
Name of Society : ISMET7 International Society for Microbial Electrochemistry and Technology Global Conference (2019)
Name of Proceedings : Abstracts, 128
What the monitoring data in Lake Kasumigaura tell us

Presenter : Komatsu K., Kohzu A., Matsuzaki S., Nakagawa M., Tomioka N., Ueno R., Shinohara R., Tsuchiya K.
Name of Society : 17th World Lake Conference (2018)
Name of Proceedings : Abstracts, 88-90
Bacterial production and carbon budget at the center of Lake Kasumigaura, Japan

Presenter : Tsuchiya K., Sano T., Tomioka N., Takamura N., Nakagawa M., Kohzu A., Komatsu K., Shinohara R., Imai A.
Name of Society : 17th World Lake Conference (2018)
Name of Proceedings : Proceedings, 74-75
Analysis of phosphorus compounds by using 2D(1 H 31 P)-nuclear magnetic resonance (NMR) spectroscopy in an oligotrophic environment

Presenter : Shinohara R., Tomoya Iwata, Yoshiki Ikarashi, Sano T., Kohzu A.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Long-term monitoring of Lake Kasumigaura, Japan: a 40 year legacy and looking to the future

Presenter : Matsuzaki S., Komatsu K., Kohzu A., Tomioka N., Shinohara R., Shimotori K., Ueno R., Kondo N., Yamaguchi H., Kadoya T., Ando H., Nakagawa M., Totsu K., Imai A., Takamura N.
Name of Society : Global Lake Ecological Observatory Network (GLEON) 19 (2017)
Name of Proceedings : Abstracts
Dynamics of Phosphorus in suspended particles in a shallow eutrophic lake: a 31P NMR study

Presenter : Shinohara R., Imai A., Kohzu A., Tomioka N., Furusato E., Sato T., Sano T., Komatsu K., Miura S., Shimotori K.
Name of Society : American Geophysical Union Fall Meeting 2016 (2016)
Name of Proceedings : -
Phosphorus (P) speciation in aquatic macrophytes around Lake Kasumigaura: A 31P NMR study.

Presenter : Shinohara R., Imai A., Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Name of Society : Water and Environment Technology Conference 2015 (2015)
Name of Proceedings : WET2015, 43
Temporal and Vertical Changes in Sediment P Compounds in Lake Kasumigaura, Japan - A31 P Nuclear Magnetic Resonance Spectroscopy Study

Presenter : Shinohara R., Imai A., Kawasaki, Komatsu K., Kohzu A., Miura S., Sano T., Sato T., Tomioka N., Shimotori K.
Name of Society : Joint Aquatic Sciences Meeting 2014 (2014)
Name of Proceedings : -
Long-term trends in dissolved organic matter, phosphorus and nitrogen in sediment porewater of the shallow eutrophic Lake Kasumigaura, Japan

Presenter : Imai A., Komatsu K., Sato T., Kohzu A., Shinohara R., Tomioka N., Shimotori K.
Name of Society : 8th Shallow Lakes Conference (2014)
Name of Proceedings : Abstracts, 192
Comparison based on concentration, d15N, and d18O of nitrate to analyze run-off nitrate discharge processes different between two mountain streams around Mt. Tsukuba, Japan

Presenter : Kohzu A., Watanabe Mirai., Hayashi S., Miura S., Imai A.
Name of Society : 3rd International Conference on Nitrification (ICoN3) (2013)
Name of Proceedings : Abstracts, 73-73
Metabolism in forest ecosystems from the analysis of nitrate 15N and 18O natural abundances in mountaion streams around Mt. Tsukuba, Japan

Presenter : Kohzu A., Watanabe Mirai., Hayashi S., Imai A., Nakajima Y., Osaka K., Miura S.
Name of Society : Voyages of Discovery (2012)
Name of Proceedings : Abstracts, 65
Distribution Patterns of Dissloved Carbohydrates in Eutrophic Lake Kasumigaura

Presenter : Sato T., Kawasaki N., Komatsu K., Imai A., Kohzu A., Miura S.
Name of Society : The 4th IWA-ASPIRE Conference and Exhibition Toward sustainable water supply and recycling systems (2011)
Name of Proceedings : Abstract of The 4th IWA-ASPIRE Conference and Exhibition Toward sustainable water supply and recycling systems, 466
Historical change in nitrogen isotope ratios of sediments in Lake Kasumigaura during 1979-2007

Presenter : Kohzu A., Imai A., Matsushige K., Kazuhiro K., Kawasaki N., Fukushima T.
Name of Society : 7th Int.Symp.Subsurface Microbiol. (2008)
Name of Proceedings : Abstracts, 93

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Long-term changes in nitrogen cycles, water quality and isotopic composition in Lake Kasumigaura, Japan

Presenter : Kohzu A., Komatsu K., Imai A.
Name of Society : ILTER-Nitrogen Initiative International Training Course (2016)
Name of Proceedings : Abstracts
Studies of material cycling within lotic and lentic ecosystems by nitrate isotopic analysis

Presenter : Kohzu A.
Name of Society : UY-GCOE Mini Seminar“Frontier and future of isotope science for assessing river basin environment” (2011)
Name of Proceedings : -

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KOZU Ayato

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