Keisuke Koba

7.6k total citations · 1 hit paper
142 papers, 5.6k citations indexed

About

Keisuke Koba is a scholar working on Ecology, Environmental Chemistry and Soil Science. According to data from OpenAlex, Keisuke Koba has authored 142 papers receiving a total of 5.6k indexed citations (citations by other indexed papers that have themselves been cited), including 82 papers in Ecology, 48 papers in Environmental Chemistry and 43 papers in Soil Science. Recurrent topics in Keisuke Koba's work include Soil Carbon and Nitrogen Dynamics (42 papers), Soil and Water Nutrient Dynamics (36 papers) and Groundwater and Isotope Geochemistry (34 papers). Keisuke Koba is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (42 papers), Soil and Water Nutrient Dynamics (36 papers) and Groundwater and Isotope Geochemistry (34 papers). Keisuke Koba collaborates with scholars based in Japan, China and United States. Keisuke Koba's co-authors include Naohiro Yoshida, Muneoki Yoh, Sakae Toyoda, Yunting Fang, Akiko Makabe, Naoko Tokuchi, Nobuhito Ohte, Kazuo Isobe, Keishi Senoo and Satoru Hobara and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Geophysical Research Atmospheres and Environmental Science & Technology.

In The Last Decade

Keisuke Koba

135 papers receiving 5.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Ecological interpretations of nitrogen isotope ratios of terrestrial plants and soils

2015 463 citations Keisuke Koba et al. profile →

Peers

Countries citing papers authored by Keisuke Koba

Since Specialization

Citations

This map shows the geographic impact of Keisuke Koba's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keisuke Koba with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keisuke Koba more than expected).

Fields of papers citing papers by Keisuke Koba

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keisuke Koba. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keisuke Koba. The network helps show where Keisuke Koba may publish in the future.

Co-authorship network of co-authors of Keisuke Koba

This figure shows the co-authorship network connecting the top 25 collaborators of Keisuke Koba. A scholar is included among the top collaborators of Keisuke Koba based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keisuke Koba. Keisuke Koba is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Elucidating the isotopic dynamics of nitrate and ammonium in the Fuji River using a Lagrangian approach: stable nitrate and fractionating ammonium 2025 ·Progress in Earth and Planetary Science ·Christophe Nguyen, Tomoya Iwata, (unknown), Midori Yano, Akiko Makabe, Keisuke Koba	0
2	Trophic niche partitioning and intraspecific variation in food resource use in the genus Pangasianodon in a reservoir revealed by stable isotope analysis of multiple tissues 2024 ·Journal of Fish Biology ·(unknown), Nobuhito Ohte, Hideyuki Doi, (unknown), Keisuke Koba, Nobuaki Arai, Yasushi Mitsunaga, Manabu Kume, (unknown), Takashi Nose, (unknown), (unknown), Hiromichi Mitamura	0
3	Sequential migrations of diverse fish community provide seasonally prolonged and stable nutrient inputs to a river 2024 ·Science Advances ·(unknown), Yuji Onishi, Keisuke Koba, Keitaro Fukushima, Hiromi Uno	4
4	Multipath ecological influence of an iteroparous fish migration from Lake Biwa to an alluvial stream 2023 ·Freshwater Biology ·(unknown), Yuji Onishi, Keisuke Koba, Keitaro Fukushima, Hiromi Uno	3
5	Major contribution of sulfide‐derived sulfur to the benthic food web in a large freshwater lake 2023 ·Geobiology ·Yuji Onishi, Toshiro Yamanaka, Keisuke Koba	4
6	Natural ¹⁵N abundance of ammonium and nitrate in soil profiles: New insights into forest ecosystem nitrogen saturation 2022 ·Ecosphere ·Geshere Abdisa Gurmesa, Erik A. Hobbie, Shasha Zhang, Ang Wang, Feifei Zhu, Weixing Zhu, Keisuke Koba, Muneoki Yoh, Chuankuan Wang, Qiuliang Zhang, Yunting Fang	17
7	Efficacite des bioinsecticides a base de l’huile essentielle de Cymbopogon schoenanthus (L.) spreng contre les punaises rouges (Dysdercus voelkeri, schmidt) en culture cotonniere au Togo 2021 ·African Journal of Food Agriculture Nutrition and Development ·(unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Keisuke Koba, (unknown), Komla Sanda, (unknown), C. Raynaud, (unknown)	1
8	Multiyear Measurements on Δ¹⁷O of Stream Nitrate Indicate High Nitrate Production in a Temperate Forest 2020 ·Environmental Science & Technology ·Shaonan Huang, Fan Wang, Emily M. Elliott, Feifei Zhu, Weixing Zhu, Keisuke Koba, Zhongjie Yu, Erik A. Hobbie, Greg Michalski, Ronghua Kang, Anzhi Wang, Jiaojun Zhu, Shenglei Fu, Yunting Fang	32
9	Mature conifers assimilate nitrate as efficiently as ammonium from soils in four forest plantations 2020 ·New Phytologist ·(unknown), Ang Wang, Erik A. Hobbie, Feifei Zhu, (unknown), (unknown), Dejun Li, Xueyan Liu, Weixing Zhu, Keisuke Koba, Yinghua Li, Yunting Fang	43
10	Interspecific variation in foliar nutrients and isotopes of submerged macrophytes in the Cau Hai Lagoon, the typical brackish lagoon in Vientam 2020 ·Botanica Pacifica ·(unknown), Nguyen Tien Hoang, (unknown), Hidenori Harada, Keisuke Koba, Natacha Brion, (unknown), (unknown), Tim Sierens, Harry Olde Venterink	2
11	Nitrate is an important nitrogen source for Arctic tundra plants 2018 ·Proceedings of the National Academy of Sciences ·(unknown), Keisuke Koba, Lina Koyama, Sarah E. Hobbie, Marissa S. Weiss, Yoshiyuki Inagaki, Gaius R. Shaver, Anne E. Giblin, Satoru Hobara, Knute J. Nadelhoffer, Martin Sommerkorn, Edward B. Rastetter, George W. Kling, James A. Laundre, Yuriko Yano, Akiko Makabe, Midori Yano, Cong-Qiang Liu	110
12	Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth 2015 ·Proceedings of the National Academy of Sciences ·Takuro Nunoura, Yoshihiro Takaki, Miho Hirai, Shigeru Shimamura, Akiko Makabe, Osamu Koide, Tohru Kikuchi, Junichi Miyazaki, Keisuke Koba, Naohiro Yoshida, Michinari Sunamura, Ken Takai	230
13	Variations in nitrogen-15 natural abundance of plant and soil systems in four remote tropical rainforests, southern China 2013 ·Oecologia ·Ang Wang, Yunting Fang, Dexiang Chen, Keisuke Koba, Akiko Makabe, Yide Li, Tushou Luo, Muneoki Yoh	31
14	Characterization and production and consumption processes of N₂O emitted from temperate agricultural soils determined via isotopomer ratio analysis 2011 ·Global Biogeochemical Cycles ·Sakae Toyoda, Midori Yano, Seiichi Nishimura, Hiroko Akiyama, Atsushi Hayakawa, Keisuke Koba, Shigeto Sudo, Kazuyuki Yagi, Akiko Makabe, (unknown), Nanako O. Ogawa, Naohiko Ohkouchi, Keita Yamada, Naohiro Yoshida	126
15	δ ¹⁵ N of soil N and plants in a N‐saturated, subtropical forest of southern China 2010 ·Rapid Communications in Mass Spectrometry ·Keisuke Koba, Kazuo Isobe, Yu Takebayashi, Yunting Fang, (unknown), (unknown), Muneoki Yoh, Jiangming Mo, Lei Liu, Xiao‐Tao Lü, (unknown), W. Zhang, Keishi Senoo	36
16	Biomass production and energy source of thermophiles in a Japanese alkaline geothermal pool 2009 ·Environmental Microbiology ·Hiroyuki Kimura, (unknown), (unknown), Shohei Hattori, Keita Yamada, Keisuke Koba, Naohiro Yoshida, Kenji Kato	11
17	Activité antimicrobienne des huiles essentielles de Cymbopogon citratus L. (DC) Stapf., C. nardus L. Rendle et C. schoenanthus L. Spreng. 2008 ·Journal de Mycologie Médicale ·Keisuke Koba, Kyari Abba Sanda, C. Raynaud, Danielle Mandin, (unknown), Jean Pierre Chaumont	4
18	Isotopomeric Signature of Nitrous Oxide Discharged from Lake Biwa in Japan and a Polluted River in Mongolia 2007 ·AGU Fall Meeting Abstracts ·(unknown), Keisuke Koba, Sakae Toyoda, Naohiro Yoshida	1
19	A review of stable isotope studies of nitrogen dynamics in soil-plant systems in forest ecosystems. ( Use of stable isotopes for a new aspect of ecosystem : Ecosystem dynamism reflected in stable isotopes 1999 ·Nihon Seitai Gakkaishi ·Keisuke Koba, (unknown), Ayato Kohzu	2
20	Abundances of 13C and 15N in Natural Ecosystems. 1997 ·RADIOISOTOPES ·Nanako O. Ogawa, Keisuke Koba, Ayato Kohzu, Eitaro WADA	5

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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