About Me (C.V.)
Yasuhiko T. YAMAGUCHI, Ph.D.
Researcher
Lake Biwa Environmental Research Institute (LBERI)
5-34, Yanagasaki, Otsu, Shiga, 520-0022 Japan
E-mail: yamaguchi-y (at) lberi.jp
Professional experience
2017.7 - present: Researcher (tenured), Lake Biwa Environmental Research Insitutite (LBERI), Japan
2016.4 - 2017.6: Research Fellow, Atmosphere and Ocean Research Institute, The University of Tokyo, Japan (Toshi Nagata Lab)
2013.6 - 2014.12: Research Scholar, Ocean Sciences Department, University of California, Santa Cruz, US (Matthew McCarthy Lab)
2013.4 - 2016.3: JSPS Research Fellow PD, Department of Earth and Planetary Sciences, The University of Tokyo, Japan (Yohey Suzuki Lab)
Education
2008.4 - 2013.3: Research student, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan (Naohiko Ohkouchi Lab)
2008.4 - 2013.3: Graduate studies at Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo, Japan (Yusuke Yokoyama Lab)
2006.4 - 2008.3: Undergraduate studies at the Department of Earth and Planetary Environmental Sciences, School of Science, The University of Tokyo, Japan
2003.4 - 2006.3: College of Arts and Sciences, The University of Tokyo, Japan
1997.4 - 2003.3: Tokai Junior and Senior High School, Japan
1984.12: Born in Nagoya, Japan
Academic degrees
2013.3: Ph.D.: The University of Tokyo, Advisers: Yusuke Yokoyama and Naohiko Ohkouchi, Thesis title: "Biogeochemical Dynamics of Amino Acids in Marine Sediments: Constraints from Compound-Specific Nitrogen Isotopic Composition and D/L Ratio"
2010.3: M.Sc.: The University of Tokyo, Advisers: Yusuke Yokoyama and Naohiko Ohkouchi, Thesis title: "Nitrogen isotopic signatures of amino acids in Eukarya, Bacteria, and Archaea: a novel tool in biogeochemistry"
2008.3: B.Sc.: The University of Tokyo, Adviser: Yusuke Yokoyama, Thesis title: "Northern hemisphere climate changes induced by the galactic cosmic ray variations during the Maunder Minimum" (in Japanese)
Fellowships and awards
Fellowships
2013.4 - 2016.3: JSPS Research Fellow PD (Japan Society for the Promotion of Science), at The University of Tokyo, Japan & at University of California, Santa Cruz, US
2010.4 - 2013.3: JSPS Research Fellow DC1 (Japan Society for the Promotion of Science), at The University of Tokyo, Japan
Academic Honors and Awards
2018.8: Taguchi Award (award for an early-career scientist), The Japanese Association of Organic Geochemists
2012.9: Oral Presentation Award, 2012 Youth Symposium for Japanese geochemists, Fukuoka, Japan
2010.8: Poster Award, 28th Symposium for Japanese Organic Geochemists, Nagaoka, Japan
2010.3: Award for Best M.Sc. Thesis, Department of Earth and Planetary Sciences, The University of Tokyo, Japan
2009.9: Poster Award, 19th International Symposium on Environmental Biogeochemistry, Humburg, Germany
2008.9: Best Poster Award, 2008 Youth Symposium for Japanese geochemists, Tokyo, Japan
2008.3: Dean’s Award for B.Sc. Students, School of Sciences, The University of Tokyo, Japan
2008.3: Award for Best B.Sc. Students, Department of Earth and Planetary Environmental Sciences, The University of Tokyo, Japan
Field and cruise experience
2020
R/V Biwakaze - Sampling of POM and DOM at Lake Biwa, Japan (total: 11 days)
2019
R/V Biwakaze - Sampling of POM and DOM at Lake Biwa, Japan (total: 11 days)
2018
R/V Biwakaze - Sampling of POM and DOM at Lake Biwa, Japan (total: 7 days)
2017
R/V Biwakaze - Sampling of POM and DOM at Lake Biwa, Japan (total: 3 days)
2016
R/V Yayoi and R/V Grand Maillet - Sampling of seawater POM and sediments at Otsuchi Bay, Japan (2016.5: 1 day)
2014
R/V Kilo Moana, KM14-18 - Sampling of seawater POM and DOM at Station ALOHA in the North Pacific Subtropical Gyre (2014.8-9: 15 days)
Sampling of seawater DOM at GCMPSL (Granite Canyon Marine Pollution Studies Lab), California, US (2014.5)
R/V Kilo Moana, KM14-07 - Sampling of seawater POM and DOM at Station ALOHA in the North Pacific Subtropical Gyre (2014.2: 12 days)
2010
D/V JOIDES Resolution, IODP (Integrated Ocean Drilling Program) Exp. 329 "South Pacific Gyre Subseafloor Life" - Sampling of deep subseafloor sediments in the South Pacific Gyre (2010.10-12: 66 days)
2009
D/V Chikyu, CK09-05 (Exp. 905) - Sampling of deep subseafloor sediments in the Sagami Trough, Pacific (2009.12: 15 days)
D/V Chikyu, CK09-01 (Exp. 903, Leg 1) - Sampling of deep subseafloor sediments at the Kumano Mud Volcano No. 5 in the Nankai Trough, Pacific (2009.3: 15 days)
...156 days at sea and at lakes in total
Grants
Principal Investigator
2021.4 - 2024.3: Microbial Nitrogen Pump: Bacterial semi-labile dissolved organic nitrogen as a nutrient transport pathway in aquatic systems, JSPS Grant-in-Aid for Scientific Research (B). KAKENHI 21H03584, 17,290,000 JPY.
2018.4 - 2023.3: Development of high-precision nitrogen isotope analysis as a new index of dissolved organic matter sources in aquatic environments, JSPS Grant-in-Aid for Early-Career Scientists, KAKENHI 18K18189, 4,030,000 JPY.
2018.4 - 2019.3: Bacterial contribution to dissolved organic matter pools in lakes: Development of a quantification method using enantiomeric biomarkers, Lake Biwa-Yodo River Water Quality Preservation Organization. 800,000 JPY.
2013.4 - 2016.3: Development of sedimentary ancient DNA analysis to study variability of biogeochemical cycles in the past ocean, Grant-in-Aid for JSPS Research Fellowship for Young Scientists, KAKENHI 13J10453, 3,960,000 JPY.
2010.4 - 2013.3: Development and application of compound-specific nitrogen isotope analysis of amino acids to study biogeochemical cycles in deep subseafloor environments, Grant-in-Aid for JSPS Research Fellowship for Young Scientists, KAKENHI 10J06167, 2,100,000 JPY.
Co-Investigator
2021.7 - 2024.3: Development of a method for the detection of microbial food web in terrestrial and aquatic environments by using compound specific stable isotope analysis of multiple amino acids, JSPS Grant-in-Aid for Challenging Research (Exploratory), KAKENHI 21K19301. (PI: Ichiro Tayasu @ RHIN)
2021.4 - 2024.3: New development of dynamics and characterization dissolved organic nitrogen in freshwater environments by molecular weight fractionation using nanofiltration, JSPS Grant-in-Aid for Scientific Research (C), KAKENHI 21K12232. (PI: Kazuhide Hayakawa @ LBERI)
2019.4 - 2022.3: Microbial loop, dominant food chain in lake hypolimnion, JSPS Grant-in-Aid for Scientific Research (B), KAKENHI 19H03302. (PI: Shinichi Nakano @ CER, Kyoto Univ.)
Grants for travel or meetings
2011.9: Presentation at the 25th International Meeting on Organic Geochemistry (Interlaken, Switzerland), The University of Tokyo - GCOE program, International Travel Grant for Students.
2010.9: Organizing 2010 Youth Symposium for Japanese Geochemists, The Geochemical Society of Japan, Torii Foundation.
Academic teaching and outreach activity
Special Lecturer, Mass Extinctions and Glacial-interglacial cycles, Natural Sciences II (Earth History), Musashino Art University, Tokyo, Japan (2016.6)
Special Lecturer, Climate changes and human activities, Workshop for science teachers in junior high schools in Fuchu City, Tokyo, Japan (2015. 3)
Speaker, What causes Earth's environments to change?, Sanmonkai, Tokyo, Japan (2010.9)
Outreach poster, What causes global warming?, The University of Tokyo May Festival 2009, Tokyo, Japan (2009.5)
Teaching Assistant, Practical: Earth and Planetary Environmental Science, Department of Earth and Planetary Sciences, The University of Tokyo, Japan (2008.10-2009.3)
Professional services and affiliations
Editorial Service
Researches in Organic Geochemistry (Associate Editor, 2020.8 - present)
Geochemical Journal (Associate Editor, 2020.1 - present)
Frontiers in Marine Science: Marine Biogeochemistry section (Review Editor, 2018.3 - present)
Referee Activities
Biogeosciences (2)
Earth, Life, and Isotopes (Book) (1)
Ecological Research (1)
Environmental Science & Technology (1)
Frontiers in Marine Science (1)
Geochemical Journal (2)
Geochimica et Cosmochimica Acta (3)
Journal of Marine Systems (1)
Limnology and Oceanography: Methods (1)
Microbes and Environments (2)
Organic Geochemistry (1)
Radioisotopes (1)
Quaternary International (1)
Researches in Organic Geochemistry (6)
(in alphabet order with the number of times)
Affiliations
Association for the Sciences of Limnology and Oceanography (ASLO), Member (2012 - present)
The Japanese Society of Limnology: Member (2018 - present)
Japanese Society of Biogeochemistry: Member (2012 - present)
Japan Geoscience Union (JpGU): Member (2010 - present), Information & System Committee (2020 - present)
The Geochemical Society of Japan: Member (2008 - present), Director (2021 - present)
The Japanese Association of Organic Geochemists: Member (2008 - present), Director (2019 - present)