Latest Update：2019/10/18 16:54:37

KAZUHIRO Komatsu

Researcher Name: KAZUHIRO Komatsu

Div (Section) name/title: Center for Regional Environmental Research（Lake and River Environment Section）／Senior Researcher

Research Subject: The study of characterization and function of dissolved organic matter (DOM) in lakes

Degree(s): Ph.D. in Engineering

Professional Qualification(s): Engineering,Civil Engineering

Environmental Speciality Field: Water environment,Lake

Research Subject

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
- 24794 : Study on water quality and lake-bottom environment for protection of the soundness of water environment
- 24975 : Studies on Advancing the Methods for Climate Change Impacts Assessment
- 24983 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
- 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
- 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
- 24438 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
- 24518 : Evaluation of organic carbon budgets in Lake Biwa for management of water quality and ecosystem
- 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
- 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
- 24020 : Evaluation of organic carbon budgets in Lake Biwa for management of water quality and ecosystem
- 24069 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
- 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
- 23599 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
- 23601 : Evaluation of organic carbon budgets in Lake Biwa for management of water quality and ecosystem
- 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
- 22798 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
- 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
- 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
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
- 22044 : Characterization of the effect to DOM biodegradability by photochemical transformation
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
- 21671 : Characterization of the effect to DOM biodegradability by photochemical transformation
Fiscal Year: 2010
- 20868 : Studies on dissolved organic matter in aquatic environments
- 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
- 21025 : Terrestrial Monitoring
Fiscal Year: 2009
- 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
- 20650 : Terrestrial Monitoring
- 20669 : Studies on dissolved organic matter in aquatic environments
Fiscal Year: 2008
- 20059 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
- 20342 : Studies on dissolved organic matter in aquatic environments
- 20343 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
- 20344 : Photoalteration of DOM in water environment
Fiscal Year: 2007
- 10441 : Determination of iron specition in lake and its effects through iron availability on algal blooming
- 10490 : Development of chromatograhy system with organic cabon detection for evaluating characteristics and reactivity of dissolved organic matter in aquatic systems
- 10606 : Studies on dissolved organic matter in aquatic environments
- 10713 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
Fiscal Year: 2006
- 10051 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
- 10127 : Optimization of DOM coagulation based on the adsorption ability to metal oxides
- 10165 : Determination of iron specition in lake and its effects through iron availability on algal blooming
- 10234 : Development of chromatograhy system with organic cabon detection for evaluating characteristics and reactivity of dissolved organic matter in aquatic systems
- 10339 : Studies on dissolved organic matter in aquatic environments
Fiscal Year: 2005
- 9328 : Global Environmental Monitoring
- 9626 : Optimization of DOM coagulation based on the adsorption ability to metal oxides
- 9661 : Determination of iron specition in lake and its effects through iron availability on algal blooming

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Research Result (Publication)

all
Original Paper

Original Paper
Comparison between humic-like peaks in excitation-emission matrix spectra and resin-fractionated humic substances in aquatic environments

Presenter : Komatsu K., Imai A., kawasaki N.
Title : , Limnology, 20(1):109-120 (2019)
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
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
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
Multi-Algorithm Indices and Look-Up Table for Chlorophyll-a Retrieval in Highly Turbid Water Bodies Using Multispectral Data

Presenter : Salem S.I., Higa H., Kim H., Komatsu K., Kobayashi H., Oki K., Oki T.
Title : , REMOTE SENSING, 9(6): (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
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
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
Analysis of stream water quality and estimation of nutrient load with the aid of Quick Bird remote sensing imagery

Presenter : He B., Oki K., Wang Y., Oki T., Yamashiki Y., Takara K., Miura S., Imai A., Komatsu K., Kawasaki N.
Title : , Hydrological Sciences Journal, 57(5):850-860 (2012)
Original Paper
Increase in silicon concentrations and release from suspended solids and bottom sediments in Lake Kasumigaura, Japan

Presenter : Arai H, Fukushima T, Komatsu K.
Title : , Limnology, 13(1):81-95 (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
Effect of light availability on Microcystis aeruginosa blooms in shallow hypereutrophic Lake Kasumigaura

Presenter : Tomioka N., Imai A., Komatsu K.
Title : , Journal of Plankton Research, 33(8):1263-1273 (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)
Original Paper
Radiocarbon measurements of dissolved organic carbon in sewage-treatment-plant effluent and domestic sewage

Presenter : Watanabe Nara F. , Imai A., Matsushige K., Komatsu K., Kawasaki N., Shibata Y.
Title : , Nucl.Instrum.Methods Phys.Res.,B, 268(7/8):1142-1145 (2010)
Original Paper
High contribution of recalcitrant organic matter to DOC in a Japanese oligotrophic lake revealed by 14C measurements

Presenter : Nara F,, Imai A., Uchida M., Matsushige K., Komatsu K., Kawasaki N., Shibata Y., Amano K., Mikami H., Hanaishi R.
Title : , Radiocarbon, 52(3):1078-1083 (2010)
Original Paper
Stable carbon isotopic characterization of DOC and its humic fraction in Lake kasumigaura,Japan

Presenter : Nara F., Imai A., Matsushige K., Komatsu K.
Title : , Verh.Internat.Verein.Limnol., 30(8):1307-1309 (2009)
Seasonal variation in spieces of dissolved organic carbon in a lacustrine environment revealed by paired isotopic measurements(Δ(14)C and δ(13)C)

Presenter : Imai A., Nara F., Imai A., Yoneda M., Matsushige K., Komatsu K., Nagai T., Shibata Y., Watanabe T., SHIBATA Yasuyuki, , KAZUHIRO Komatsu
Title : , Radiocarbon, 49(2):767-773 (2007)
Application of (14)C measurements for isotopic characterization of dissolved organic carbon(DOC) in lake water

Presenter : SHIBATA Yasuyuki, , KAZUHIRO Komatsu, Imai A.
Title : , 9th Symp.Jpn.AMS Soc.(Grad.Sch.Univ.Tokyo,Jpn.Soc.AMS Res. eds.,140p.)(第9回AMSシンポジウム東京大学大学院 AMS研究協会) (2006)
Characterization of dissolved organic matter (DOM) removed by iron coagulation using spectrofluorimetry and pyrolysis GC/MS analysis

Presenter : KAZUHIRO Komatsu
Title : , J.Water Supply.Res.Technol.Aqua, 54(3):157-163 (2005)

View all

Comparison between humic-like peaks in excitation-emission matrix spectra and resin-fractionated humic substances in aquatic environments

Presenter : Komatsu K., Imai A., kawasaki N.
Title : , Limnology, 20(1):109-120 (2019)
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)
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)
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)
Multi-Algorithm Indices and Look-Up Table for Chlorophyll-a Retrieval in Highly Turbid Water Bodies Using Multispectral Data

Presenter : Salem S.I., Higa H., Kim H., Komatsu K., Kobayashi H., Oki K., Oki T.
Title : , REMOTE SENSING, 9(6): (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)
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)
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)
Analysis of stream water quality and estimation of nutrient load with the aid of Quick Bird remote sensing imagery

Presenter : He B., Oki K., Wang Y., Oki T., Yamashiki Y., Takara K., Miura S., Imai A., Komatsu K., Kawasaki N.
Title : , Hydrological Sciences Journal, 57(5):850-860 (2012)
Increase in silicon concentrations and release from suspended solids and bottom sediments in Lake Kasumigaura, Japan

Presenter : Arai H, Fukushima T, Komatsu K.
Title : , Limnology, 13(1):81-95 (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)
Effect of light availability on Microcystis aeruginosa blooms in shallow hypereutrophic Lake Kasumigaura

Presenter : Tomioka N., Imai A., Komatsu K.
Title : , Journal of Plankton Research, 33(8):1263-1273 (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)
Radiocarbon measurements of dissolved organic carbon in sewage-treatment-plant effluent and domestic sewage

Presenter : Watanabe Nara F. , Imai A., Matsushige K., Komatsu K., Kawasaki N., Shibata Y.
Title : , Nucl.Instrum.Methods Phys.Res.,B, 268(7/8):1142-1145 (2010)
High contribution of recalcitrant organic matter to DOC in a Japanese oligotrophic lake revealed by 14C measurements

Presenter : Nara F,, Imai A., Uchida M., Matsushige K., Komatsu K., Kawasaki N., Shibata Y., Amano K., Mikami H., Hanaishi R.
Title : , Radiocarbon, 52(3):1078-1083 (2010)
Stable carbon isotopic characterization of DOC and its humic fraction in Lake kasumigaura,Japan

Presenter : Nara F., Imai A., Matsushige K., Komatsu K.
Title : , Verh.Internat.Verein.Limnol., 30(8):1307-1309 (2009)

View all

Research Result (Presentation)

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Research Presentation
Research Lecture

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
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
Survey of Natural Growth-promoting Substances for High-value Indigenous Microalgae

Presenter : Komatsu K., Kushairi M.R.M., Imai A., Kawasaki N., Onouchi H., Fadzli A., Emi F.H., Sulaiman A.H.H., Zulhairie M.R., Anis Amalina M.A., Ikram W.M.W.M.Z.
Name of Society : 4TH INTERNATIONAL POSTGRADUATE CONFERENCE ON BIOTECHNOLOGY (IPCB 2018) (2018)
Name of Proceedings : Abstracts, 4
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
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
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 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 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
Study of soil extracts which may enhance microalgal growth

Presenter : Kawasaki N., Kushairi M., Rajuddin M., Harmin S. A., Ibrahim A. L., Imai A., Komatsu K.
Name of Society : International Conference on Life Sciences Revolution 2016 (2016)
Name of Proceedings : Abstracts, 29-30
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
Sedimentation processes observed in Nam Ngum dam reservoir of Laos -A newly generated environment on the bottom in a tropical dam reservoir of the Mekong River Basin-

Presenter : Murata T., Hiroki M., Tomioka N., Yoshida K., Komatsu K., Fukushima M., Imai A., Utsugawa T., Jutagate T., Praxaysombath B.
Name of Society : XIX INQUA (2015)
Name of Proceedings : XIX INQUA 2015
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
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 Lecture
Recent research topics on dissolved organic matter (DOM) -Molecular size distribution, composition, and fluorescence properties

Presenter : Komatsu K.
Name of Society : 6th Water Environment Seminar (2012)
Name of Proceedings : -
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
An analysis of temporal dynamics of Microcystis aeruginosa in eutrophic Lake Kasumigaura by real-time PCR

Presenter : Tomioka N., Imai A., Komatsu K., Fukushima M.
Name of Society : International Symposium on Microcystis Studies from Asia (2011)
Name of Proceedings : Abstract of International Symposium on Microcystis Studies from Asia, 35
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
Seasonal Dynamics of Microcystis aeruginosa in Eutrophic Lake Kasumigaura

Presenter : Tomioka N., Imai A., Komatsu K.
Name of Society : The 4th IWA-ASPIRE Conference & Exhibition (2011)
Name of Proceedings : Abstracts of The 4th IWA-ASPIRE Conference & Exhibition Toward sustainable water supply and recycling systems, 522-523
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
Application of 14C measurements for isotopic characterization of dissolved organic carbon in lake water

Presenter : Nara F., Imai A., Matsushige K., Komatsu K., Shibata Y.
Name of Society : 9th Symp.Jpn.AMS Soc.Prospects New Front.Earth Environ.Sci. (2006)
Name of Proceedings : Abstracts
Research Presentation
Application of 14C measurements for isotopic characterization of dissolved organic carbon(DOC) in lake water

Presenter : Nara F., Imai A., Matsushige K., Komatsu K., Shibata Y.
Name of Society : 9th Symp.Jpn.AMS Soc. (2006)
Name of Proceedings : Abstracts

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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
Survey of Natural Growth-promoting Substances for High-value Indigenous Microalgae

Presenter : Komatsu K., Kushairi M.R.M., Imai A., Kawasaki N., Onouchi H., Fadzli A., Emi F.H., Sulaiman A.H.H., Zulhairie M.R., Anis Amalina M.A., Ikram W.M.W.M.Z.
Name of Society : 4TH INTERNATIONAL POSTGRADUATE CONFERENCE ON BIOTECHNOLOGY (IPCB 2018) (2018)
Name of Proceedings : Abstracts, 4
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
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
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
Study of soil extracts which may enhance microalgal growth

Presenter : Kawasaki N., Kushairi M., Rajuddin M., Harmin S. A., Ibrahim A. L., Imai A., Komatsu K.
Name of Society : International Conference on Life Sciences Revolution 2016 (2016)
Name of Proceedings : Abstracts, 29-30
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
Application of 14C measurements for isotopic characterization of dissolved organic carbon in lake water

Presenter : Nara F., Imai A., Matsushige K., Komatsu K., Shibata Y.
Name of Society : 9th Symp.Jpn.AMS Soc.Prospects New Front.Earth Environ.Sci. (2006)
Name of Proceedings : Abstracts
Application of 14C measurements for isotopic characterization of dissolved organic carbon(DOC) in lake water

Presenter : Nara F., Imai A., Matsushige K., Komatsu K., Shibata Y.
Name of Society : 9th Symp.Jpn.AMS Soc. (2006)
Name of Proceedings : Abstracts
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
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
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
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
Sedimentation processes observed in Nam Ngum dam reservoir of Laos -A newly generated environment on the bottom in a tropical dam reservoir of the Mekong River Basin-

Presenter : Murata T., Hiroki M., Tomioka N., Yoshida K., Komatsu K., Fukushima M., Imai A., Utsugawa T., Jutagate T., Praxaysombath B.
Name of Society : XIX INQUA (2015)
Name of Proceedings : XIX INQUA 2015
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
An analysis of temporal dynamics of Microcystis aeruginosa in eutrophic Lake Kasumigaura by real-time PCR

Presenter : Tomioka N., Imai A., Komatsu K., Fukushima M.
Name of Society : International Symposium on Microcystis Studies from Asia (2011)
Name of Proceedings : Abstract of International Symposium on Microcystis Studies from Asia, 35
Seasonal Dynamics of Microcystis aeruginosa in Eutrophic Lake Kasumigaura

Presenter : Tomioka N., Imai A., Komatsu K.
Name of Society : The 4th IWA-ASPIRE Conference & Exhibition (2011)
Name of Proceedings : Abstracts of The 4th IWA-ASPIRE Conference & Exhibition Toward sustainable water supply and recycling systems, 522-523
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
Recent research topics on dissolved organic matter (DOM) -Molecular size distribution, composition, and fluorescence properties

Presenter : Komatsu K.
Name of Society : 6th Water Environment Seminar (2012)
Name of Proceedings : -

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KAZUHIRO Komatsu

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