Rchr

J-GLOBAL ID：200901044168497437 Update date: Apr. 17, 2024

Koba Keisuke

コバケイスケ | Koba Keisuke

Affiliation and department：
Homepage URL (1)： http://www.ecology.kyoto-u.ac.jp/~keikoba

Research field (2)： Marine/Aquatic life sciences , Environmental dynamics

Research keywords (3)： Biogeochemistry , Ecology , Ecology in general

Research theme for competitive and other funds (47)：

2023 - 2028 「科学者のような学び方」を学ばせる計算論的ラーニングアナリティクス基盤
2021 - 2028 Towards Sustainable Nitrogen Use Connecting Human Society and Nature
2023 - 2027 Development and practice of pathway-specific N2O flux quantification method that enables matching of omics information with nitrogen fluxes
2022 - 2026 Elucidation of the soil decomposition process by the dynamic multiomics approach
2021 - 2026 Prediction of forests that maximize carbon sequestration

2022 - 2025 Clarification of mechanisms of soil nitrogen dyanamics considering mycorrizal type of trees-understory vegetation system

2022 - 2024 土壌放出HONOの同位体測定による大気HONOへの土壌影響評価

2021 - 2024 Microbial Nitrogen Pump: Bacterial semi-labile dissolved organic nitrogen as a nutrient transport pathway in aquatic systems

2020 - 2023 Analysis of Anthropocene with biological archives: A case study in Lake Biwa

2020 - 2023 Influence of changes in lake water circulation processes due to global warming on denitrification in the sediment at Lake Biwa

2020 - 2022 植物-菌根共生と自由生活型土壌微生物の相互作用が変革する窒素循環

2018 - 2022 Integration of DNA metabarcoding and stable isotope analyses for disentangling below-ground ecosystem processes

2018 - 2022 Precise examination of N2O production and consumption processes with MILNC

2017 - 2021 Stable isotope analysis of nucleic acid: integration of the genetic and environmental information

2016 - 2020 Development of ecosystem traceability techniques using multi-elements and molecular level isotope ratios

2016 - 2020 Nitrogen cycle by subterranean microbial community; Groundwater flow and microbial denitrification in deep aquifer associated with the accretionary prisms

2016 - 2020 Development of estimation method for evaluating N transfer from ectomycorrhizal fungi to host trees based on the fractionation of N stable isotope

2015 - 2019 Detect the vulnerable area for N saturation based on new concept of N saturation

2014 - 2017 The use of stable isotope ratios of nitrate in the forest ecosystems for the better understanding of nitrogen status

2014 - 2017 Nitrogen controlling carbon dynamics in rice-paddy ecosystems under climate change: Possible mechanisms to mitigate rice-paddy methane emissions

2014 - 2017 Source estimation of NOx in forest ambient air using nitrogen isotopic composition

2014 - 2017 Elucidating N2O production mechanisms by ammonia-oxidizing bacteria based on nitrogen atoms and electron flows

2013 - 2017 Effects of thinning on development of understory vegetation and nitrogen utilization of hinoki cypress trees

2014 - 2016 Isotope fractionations during anammox

2013 - 2015 中国南西部における侵入植物と土着植物の窒素利用様式に関する研究

2013 - 2015 Elucidation of the processes of N retention and emission through nitrite and nitric oxide in forest soils

2011 - 2012 重窒素酸素トレーサー測定による森林土壌での亜硝酸生成消費プロセスの解明

2010 - 2012 The impact of snowpack change by climate change on biogeochemical cycles in forest soil

2010 - 2012 Elucidation of mechanism of nitrogen saturation by using stable nitrogen isotope ratio

2009 - 2011 コケ窒素同位体を用いた東京西部における大気窒素沈着状況の把握

2009 - 2011 亜熱帯中国に生起した「アジア型」酸性化の実態解明:生物・微生物相の変容とその機構

2008 - 2010 Gross production and consumption measurement of N2O and CH4 by using stable isotope tracer technique

2007 - 2009 Isotopomer Analyses of biophile elements in microbial greenhouse gases using incubation experiments.

2007 - 2009 Large-scale evaluation of biogeochemical functions in forest soilalong with environmental gradient

2007 - 2009 森林植生の養分利用様式を解明するための窒素安定同位体比測定手法の開発

2006 - 2009 Development of evaluation protocols on ecological functions of forested catchments for water quality conservation

2007 - 2008 安定同位体比測定による海洋生物起源メタン・硫化カルボニルの生成過程の解明

2007 - 2008 Evaluation of ecosystem impact by using peculiar isotopic signaturesof nitrogen deposition

2006 - 2007 硝酸の酸素同位体異常を用いた森林窪素循環の把握

2003 - 2005 Emission and oxidation of CH4 and N2O in forest catchment and effect of hydrological process

2003 - 2005 カワウ営巣地管理へ向けたカワウの養分循環・森林植生への影響査定

2001 - 2004 Studies on environment and resources information system for circulatory society

2001 - 2002 琵琶湖におけるカワウ問題解決への地域統合生態経済モデルの構築

1999 - 2002 Fundamental studies for intensive use of information obtained form biosphere

1998 - 1998 安定同位体を用いた森林生態系における物質循環機構の把握

Show all

Papers (141)：

Ayano Medo, Nobuhito Ohte, Keisuke Koba, Nobuaki Arai, Yasushi Mitsunaga, Hideaki Nishizawa, Manabu Kume, Thavee Viputhanumas, Kiattipong Kamdee, Chakrit Saengkorakot, et al. Trophic niche partitioning of Mekong giant catfish Pangasianodon gigas in a tropical reservoir: evidence from stable isotope and fatty acid analyses. Limnology. 2024. 25. 2. 199-210
Yuji Onishi, Toshiro Yamanaka, Keisuke Koba. Major contribution of sulfide-derived sulfur to the benthic food web in a large freshwater lake. Geobiology. 2023. 21. 5. 671-685
Akira S. Mori, Kureha F. Suzuki, Masakazu Hori, Taku Kadoya, Kotaro Okano, Aya Uraguchi, Hiroyuki Muraoka, Tamotsu Sato, Hideaki Shibata, Yukari Suzuki-Ohno, et al. Perspective: sustainability challenges, opportunities and solutions for long-term ecosystem observations. Philosophical Transactions of the Royal Society B: Biological Sciences. 2023. 378. 1881
Akira Kurasawa, Yuji Onishi, Keisuke Koba, Keitaro Fukushima, Hiromi Uno. Multipath ecological influence of an iteroparous fish migration from Lake Biwa to an alluvial stream. Freshwater Biology. 2023
Jinsen Zheng, Kazumichi Fujii, Keisuke Koba, Wolfgang Wanek, Christoph Müller, Anne B. Jansen-Willems, Yasuhiro Nakajima, Rota Wagai, Alberto Canarini. Revisiting process-based simulations of soil nitrite dynamics: Tighter cycling between nitrite and nitrate than considered previously. Soil Biology and Biochemistry. 2023. 108958-108958

ｍore...

MISC (305)：

大西雄二, 山中寿朗, 木庭啓介. 成層期の琵琶湖における堆積物中硫黄循環と底生動物への影響. 日本地球惑星科学連合2023年大会要旨集. 2023
舟川一穂, 木庭啓介. 安定同位体比分析を用いたニホンザル野生群の食性解析. 日本地球惑星科学連合2023年大会要旨集. 2023
目戸綾乃, 大手信人, 能勢貴司, 梶谷浩希, 大西雄二, 木庭啓介, 荒井修亮, 光永靖, 久米学, 西澤秀明, et al. Contribution of chemoautotrophic bacteria to food source of freshwater megafish in a reservoir using multiple stable isotopes. 日本生態学会大会講演要旨(Web). 2022. 69th
倉澤央, 大西雄二, 福島慶太郎, 横井瑞士, 木庭啓介, 宇野裕美. Effect of migratory fishes from Lake Biwa on stream communities. 日本生態学会大会講演要旨(Web). 2021. 68th
藤巻玲路, 清本芽生, 福島慶太郎, 大西雄二, 木庭啓介. Stable isotope analysis of soil solution nitrate in a deciduous broadleaf forest. 日本生態学会大会講演要旨(Web). 2021. 68th

ｍore...

Lectures and oral presentations (260)：

Influence on nutrient dynamics in stream water by fish excretion
(日本地球化学会年会要旨集(Web) 2020)
北太平洋亜熱帯循環域における硝酸塩窒素同位体分布
(日本海洋学会大会講演要旨集 2020)
Individual specificity of feeding habit analyzed by stable isotope in a group of Japanese macaque.
(日本地球惑星科学連合大会予稿集(Web) 2020)
Nitrate contamination of mountainous headwater streams from adjacent agricultural and pasture lands beyond the watershed boundary in eastern Hokkaido, Japan
(日本地球惑星科学連合大会予稿集(Web) 2020)
Stable carbon and nitrogen isotope analysis of bacterial nucleic acid
(日本地球惑星科学連合大会予稿集(Web) 2020)

ｍore...

Education (4)：

- 2000 Kyoto University
- 2000 Kyoto University Graduate School, Division of Agriculture
- 1994 Kyoto University Faculty of Agriculture
- 1994 Kyoto University Faculty of Agriculture

Professional career (1)：

Doctor of Agriculture (Kyoto University)

Work history (6)：

2016/02 - 現在 Kyoto University
2011/04 - 2016/01 東京農工大学大学院農学研究院准教授
2006/11 - 2011/03 Tokyo University of Agriculture and Technology Institute of Symbiotic Science and Technology, Strategic Division of Young Researchers Associate Professor
2003/05 - 2006/11 東京工業大学大学院総合理工学研究科講師
1998/10 - 2003/04 Kyoto University Graduate School of Informatics

Show all

Association Membership(s) (7)：

日本地球化学会 , 日本生態学会 , 日本アイソトープ協会 , 生物地球化学研究会 , 日本バイオロギング研究会 , 日本陸水学会 , 日本微生物生態学会

※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

Return to Previous Page