Peer-reviewed papers in English (Updated on 26th August, 2023); Google Scholar --> Here, Web of Science, Researcher ID --> Here
2023
115. A. Medo, N. Ohte, H. Kajitani, T. Nose, Y. Manabe, T. Sugawara, Y. Onishi, A. S. Goto, K. Koba, N. Arai, Y. Mitsunaga, M. Kume, H. Nishizawa, D. Kojima, A. Yokoyama, T. Yamanaka, T. Viputhanumas and H. Mitamura. 2023.
Striped catfish (Pangasianodon hypophthalmus) exploit food sources across anaerobic decomposition- and primary photosynthetic production-based food chains.
Scientific Reports 13:13992--> abstract
114. Y. Onishi, T. Yamanaka and K. Koba. 2023.
Major contribution of sulfide-derived sulfur to the benthic food web in a large freshwater lake.
Geobiology 21:671-685--> abstract
113. A. S. Mori, K. F. Suzuki, M. Hori, T. Kadoya, K. Okano, A. Uraguchi, H. Muraoka, T. Sato, H. Shibata, Y. Suzuki-Ohno, K. Koba, M. Toda, S. Nakano, M. Kondoh, K. Kitajima and M. Nakamura. 2023.
Perspective: sustainability challenges, opportunities and solutions for long-term ecosystem observations.
Philosophical Transactions of the Royal Society B 378:20220192--> abstract
112. J. Zheng, K. Fujii, K. Koba, W. Wanek, C. Muller, A. B. Jansen-Willems, Y. Nakajima, R. Wagai, and A. Canarini. 2023.
Revisiting process-based simulations of soil nitrite dynamics: Tighter cycling between nitrite and nitrate than considered previously.
Soil Biology and Biochemistry 178:108958--> abstract
111. A. Kurasawa, Y. Onishi, K. Koba, K. Fukushima, and H. Uno. 2023.
Multipath ecological influence of an iteroparous fish migration from Lake Biwa to an alluvial stream.
Freshwater Biology 68(8):1400-1412 --> abstract
2022
[ K. Koba. 2022.]
Missing flux from the ocean: isotope revealed an important NOx flux mediated by microbial processes.
National Science Review 9(9):nwac142 --> abstract
110. G. A. Gurmesa, E. A. Hobbie, S. Zhang, A. Wang, F. Zhu, W. Zhu, K. Koba, M. Yoh, C. Wang, Q. Zhang, and Y. Fang. 2022.
Natural 15N abundance of ammonium and nitrate in soil profiles: New insights into forest ecosystem nitrogen saturation.
Ecosphere 2022:13:e3998 --> abstract
109. G. A. Gurmesa, A. Wang, S. Li, S. Peng, W. de Vries, P. Gundersen, P. Ciais, O. L. Phillips, E. A Hobbie, W. Zhu, K. Nadelhoffer, Y. Xi, E. Bai, T. Sun, D. Chen, W. Zhou, Y. Zhang, Y. Guo, J. Zhu, L. Duan, D. Li, K. Koba, E. Du, G. Zhou, X. Han, S. Han, and Y. Fang. 2022.
Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink.
Nature Communications 13:880 --> abstract
2021
108. S.-Q. Xu, X.-Y. Liu, Z.-C. Sun, C.-C. Hu, W. Wanek, and K. Koba. 2021.
Isotopic Elucidation of Microbial Nitrogen Transformations in Forest Soils.
Global Biogeochemical Cycles 35(12) :December 2021 e2021GB007070 --> abstract
107. C.-J. Chen, X.-Y. Liu, X.-W. Wang, C.-C. Hu, S.-Q. Xu, R. Mao, Z.-. Bu, Y.-T. Fang, and K. Koba. 2021.
Different leaf carbon, nitrogen, and phosphorus stoichiometry and carbon and nitrogen isotopes among peatland plants in northeastern China.
Plant and Soil 467:345-357 --> abstract
106. X. Ding, W. Lan, Y. Li, A. Yan, Y. Katayama, K. Koba, A. Makabe, K. Fukushima, M. Yano, Y. Onishi, Q. Ge, and J-D. Gu. 2021.
An internal recycling mechanism between ammonia/ammonium and nitrate driven by ammonia-oxidizing archaea and bacteria (AOA, AOB, and Comammox) and DNRA on Angkor sandstone monuments.
International Biodeterioration & Biodegradation 165: 105328 --> abstract
105. C. Tatsumi, F. Hyodo, T. Taniguchi, W. Shi, K. Koba, K. Fukushima, S. Du, N. Yamanaka, P. Templer, and R. Tateno 2021.
Arbuscular Mycorrhizal Community in Roots and Nitrogen Uptake Patterns of Understory Trees Beneath Ectomycorrhizal and Non-ectomycorrhizal Overstory Trees.
Frontiers in Plant Science 11:583585. doi: 10.3389/fpls.2020.583585 --> abstract
104. W. Wei, K. Isobe, Y. Shiratori, M. Yano, S. Toyoda, K. Koba, N. Yoshida, H. Shen, and K. Senoo. 2021.
Revisiting the involvement of ammonia oxidizers and denitrifiers in nitrous oxide emission from cropland soils.
Environmental Pollution 287:117494 --> abstract
103. F. Hyodo, Y. Takebayashi, A. Makabe, D. A. Wardle, and K. Koba. 2021.
Changes in stable nitrogen isotopes of plants, bulk soil and soil dissolved N during ecosystem retrogression in boreal forest.
Ecological Research 36(3):420-429 --> abstract
102. X. Zhou, A. Wang, E. A. Hobbie, F. Zhu, Y. Qu, L. Dai, D. Li, X. Liu, W. Zhu, K. Koba, Y. Li, and Y. Fang. 2021.
Mature conifers assimilate nitrate as efficiently as ammonium from soils in four forest plantations.
New Phytologist 229(6):3184-3194 --> abstract
101. Y. Seko, K. Hashimoto, K. Koba, D. Hayasaka, and T. Sawahata. 2021.
Intraspecific differences in the invasion success of the Argentine ant Linepithema humile Mayr are associated with diet breadth.
Scientific Reports 11:2874 --> abstract
100. K. Kobayashi, K. Fukushima, Y. Onishi, K. Nishina, A. Makabe, M. Yano, S. D. Wankel, K. Koba, and S. Okabe. 2021.
Influence of δ18O of water on measurements of δ18O of nitrite and nitrate.
Rapid Communications in Mass Spectrometry 35:e8979 --> abstract
2020
99. S. Kotajima, K. Koba*, D. Ikeda, A. Terada, K. Isaka, K. Nishina, Y. Kimura, A. Makabe, M. Yano, H. Fujitani, N. Ushiki, S. Tsuneda, and M. Yoh. 2020.
Nitrogen and oxygen isotope signatures of nitrogen compounds during anammox in the lab and in a wastewater treatment plant.
Microbes and Environments 35(4), doi:10.1264/jsme2.ME20031 --> abstract
98. X.‐Y. Liu, D. Wu, X. Song, Y.‐P. Dong, C.‐J. Chen, W. Song, C.‐Q. Liu, and K. Koba. 2020.
A Non‐steady State Model Based on Dual Nitrogen and Oxygen Isotopes to Constrain Moss Nitrate Uptake and Reduction.
Journal of Geophysical Research: Biogeosciences 125: e2019JG005498. --> abstract
97. R. Tateno, M. Nakayama, M. Yano, K. Fukuzawa, Y. Inagaki, K. Koba, and S. Ugawa. 2020.
Nitrogen source utilization in co-existing canopy tree and dwarf bamboo in a northern hardwood forest in Japan.
Trees 34 : 1047-1057. --> abstract
96. D. T. Nhu Y, N. T. Hoang, P. K. Lieu, H. Harada, K. Koba, N. Brion, D. V. Hieu, N. V. Hop, T. Sieren, and H. O. Venterink. 2020.
Interspecific variation in foliar nutrients and isotopes of submerged macrophytes in the Cau Hai Lagoon, the typical brackish lagoon in Vietnam.
Botanica Pacifica 9(1) : 131-138. --> abstract
95. S. Huang, F. Wang, E. M. Elliott, F. Zhu, W. Zhu, K. Koba, Z. Yu, E. A. Hobbie, G. Michalski, R. Kang, A. Wang, J. Zhu, S. Fu, and Y. Fang. 2020.
Multiyear Measurements on Delta O-17 of Stream Nitrate Indicate High Nitrate Production in a Temperate Forest.
Environmental Science and Technology 54: 4231-4239. --> abstract
2019
94. K. Isobe, Y. Ise, H. Kato, T. Oda, C. E. Vincenot, K. Koba, R. Tateno, K. Senoo, and N. Ohte. 2019.
Consequences of microbial diversity in forest nitrogen cycling: diverse ammonifiers and specialized ammonia oxidizers.
The ISME Journal doi:10.1038/s41396-019-0500-2 --> abstract
93. F. Zhu, L. Dai, E. A. Hobbie, K. Koba, X. Liu, G. A. Gurmesa, S. Huang, S. Li, Y. Li, S. Han, and Y. Fang. 2019.
Uptake Patterns of Glycine, Ammonium, and Nitrate Differ Among Four Common Tree Species of Northeast China.
Frontiers in Plant Science 10:799. doi: 10.3389/fpls.2019.00799. --> abstract
92. K. Shinoda, M. Yano, M. Yoh, M. Yoshida, A. Makabe, Y. Yamagata, B. Z. Houlton, and K. Koba*. 2019.
Control of the Nitrogen Isotope Composition of the Fungal Biomass: Evidence of Microbial Nitrogen Use Efficiency.
Microbes and Environments 34(1): 5-12. --> abstract
2018
91. K. Isobe, J. Ikutani, Y. Fang, M. Yoh, J. Mo, Y. Suwa, M. Yoshida, K. Senoo, S. Otsuka, and K. Koba. 2018.
Highly abundant acidophilic ammonia-oxidizing archaea causes high rates of nitrification and nitrate leaching in nitrogen-saturated forest soils
Soil Biology and Biochemistry 122: 220-228 --> abstract
90. A. Wang, Y. Fang, D. Chen, O. Phillips, K. Koba, W. Zhu, and J. Zhu. 2018.
High nitrogen isotope fractionation of nitrate during denitrification in four forest soils and its implications for denitrification rate estimates.
Science of The Total Environment 633: 1078-1088 --> abstract
89. X.-Y. Liu*, K. Koba*, L. A. Koyama, S. E. Hobbie, M. S. Weiss, Y. Inagaki, G. R. Shaver, A. E. Giblin, S. Hobara, K. J. Nadelhoffer, M. Sommerkorn, E. B. Rastetter, G. W. Kling, J. A. Laundre, Y. Yano, A. Makabe, M. Yano and C.-Q. Liu. 2018.
Nitrate is an important nitrogen source for Arctic tundra plants.
Proceedings of the National Academy of Sciences of the United States of America 115: 3398-3403 --> abstract
88. N. C. Thuan, K. Koba*, M. Yano, A. Makabe, C. T. Kinh, A. Terada, S. Toyoda, N. Yoshida, Y. Tanaka, M. Katsuyama, and M. Yoh. 2018.
N2O production by denitrification in an urban river: evidence from isotopes, functional genes, and dissolved organic matter.
Limnology 19: 115-126 --> abstract
2017
87. X.-Y. Liu, H.-W. Xiao, H.-Y. Xiao, W. Song, X.-C. Sun, X.-D. Zheng, C.-Q. Liu, and K. Koba. 2017.
Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China.
Environmental Pollution 230: 486-494. --> abstract
86. A. Terada, S. Sugawara, K. Hojo, Y. Takeuchi, S. Riya, W. F. HarperJr., T. Yamamoto, M. Kuroiwa, K. Isobe, C. Katsuyama, Y. Suwa, K. Koba and M. Hosomi. 2017.
Hybrid Nitrous Oxide Production from a Partial Nitrifying Bioreactor: Hydroxylamine Interactions with Nitrite.
Environmental Science and Technology
51(5): 2748-2756. --> abstract
85. S. Toyoda, N. Yoshida, and K. Koba. 2017.
Isotopocule analysis of biologically produced nitrous oxide in various environments.
Mass Spectrometry Reviews 36(2): 135-160. --> abstract
2016
84. M. Nishizawa, S. Sakai, U. Konno, N. Nakahara, Y. Takaki, Y. Saito, H. Imachi, E. Tasumi, A. Makabe, K. Koba and K. Takai. 2016.
Nitrogen and oxygen isotope effects of ammonia oxidation by thermophilic Thaumarchaeota from a geothermal water stream.
Applied and Environmental Microbiology 82(15): 4492-4504. --> abstract
83. C. B. Wenk, C. H. Frame, K. Koba, K. L. Casciotti, M. Veronesi, H. Niemann, C. J. Schubert, N. Yoshida, S. Toyoda, A. Makabe, J. Zopfi, and M. F. Lehmann. 2016.
Stable isotope and isotopomer distributions reveal differential N2O dynamics in two oxygen-deficient lake basins.
Limnology and Oceanography 61(5): 1735-1749. --> abstract
82. S. Hobara, K. Kushida, Y. Kim, K. Koba, B.-Y. Lee and N. Ae. 2016.
Relationships among pH, minerals, and carbon in soils from tundra to boreal forest.
Ecosystems 19(6): 1092-1103. --> abstract
81. A. Tanaka-Oda , T. Kenzo, Y. Inoue, M. Yano, K. Koba, and T. Ichie. 2016.
Variation in leaf and soil δ15N in diverse tree species in a lowland dipterocarp rainforest, Malaysia.
Trees 30(2): 509-522. --> abstract
2015
80. J. M. Craine, E. N. J. Brookshire, M. D. Cramer, N. J. Hasselquist, K. Koba, E. Marin-Spiotta, and L. Wang. 2015.
Ecological interpretations of nitrogen isotope ratios of terrestrial plants and soils.
Plant and Soil 396(1): 1-26. --> abstract
79. T. Nunoura, Y. Takaki, M. Hirai, S. Shimamura, A. Makabe, O. Koide, T. Kikuchi, J. Miyazaki, K. Koba, N. Yoshida, M.Sunamura, and K. Takai. 2015.
Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth.
Proceedings of the National Academy of Sciences of the United States of America 112: E1230-E1236. --> abstract
78. L. A. Rose, S. D. Sebestyen, E. M. Elliott, and K. Koba. 2015.
Drivers of Atmospheric Nitrate Processing and Export in Forested Catchments.
Water Resources Research 51: 1333-1352. --> abstract
77. Y. Fang, K. Koba*, A. Makabe, C. Takahashi, W. Zhu, T. Hayashi, A. A. Hokari, R. Urakawa, E. Bai, B. Z. Houlton, D. Xi, S. Zhang, K. Matsushita, Y. Tu, D. Liu, F. Zhu, Z. Wang, G. Zhou, D. Chen, T. Makita, H. Toda, X. Liu, Q. Chen, D. Zhang, Y. Li, and M. Yoh. 2015.
Microbial denitrification dominates nitrate losses from forest ecosystems.
Proceedings of the National Academy of Sciences of the United States of America 112: 1470-1474. --> abstract
76. J. M. Craine, A. J. Elmore, L. Wang, L. Augusto, W. T. Baisden, E. N. J. Brookshire, M. D. Cramer, N. J. Hasselquist, E. A. Hobbie, A. Kahmen, K. Koba, J. M. Kranabetter, M. C. Mack, E. Marin-Spiotta, J. R. Mayor, K. K. McLauchlan, A. Michelsen, G. B. Nardoto, R. S. Oliveira, S. S. Perakis, P. L. Peri, C. A. Quesada, A. Richter, L. A. Schipper, B. A. Stevenson, B. L. Turner, R. A. G. Viani, W. Wanekm, and B. Zeller. 2015.
Convergence of soil nitrogen isotopes across global climate gradients.
Scientific Reports 5: 8280, doi:10.1038/srep08280. --> abstract
75. W. Wei, K. Isobe, T. Nishizawa, L. Zhu, Y. Shiratori, N. Ohte, K. Koba, S. Otsuka, and K. Senoo. 2015.
Higher diversity and abundance of denitrifying microorganisms in environments than considered previously.
The ISME Journal doi:10.1038/ismej.2015.9. --> abstract
74. K. Umezawa, K. Takeda, T. Ishida, N. Sunagawa, A. Makabe, K. Isobe, K. Koba, H. Ohno, M. Samejima, N. Nakamura, K. Igarashi, and M. Yoshida. 2015.
A novel pyrroloquinoline quinone-dependent 2-keto-D-glucose dehydrogenase from Pseudomonas aureofaciens.
Journal of Bacteriology 197: 1322-1329. --> abstract
2014
73. X.-Y. Liu, K. Koba, A. Makabe, and C.-Q. Liu. 2014.
Nitrate dynamics in natural plants: insights based on the concentration and natural isotope abundances of tissue nitrate.
Frontiers in Plant Science
5:355. doi: 10.3389/fpls.2014.00355 --> abstract
72. M. Nishizawa, J. Miyazaki, A. Makabe, K. Koba, and K. Takai. 2014.
Physiological and isotopic characteristics of nitrogen fixation by hyperthermophilic methanogens: Key insights into nitrogen anabolism of the microbial communities in Archean hydrothermal systems.
Geochimica et Cosmochimica Acta 138: 117-135 --> abstract
--> Press Release
71. T. Yamazaki, T. Hozuki, K. Arai, S. Toyoda, K. Koba, T. Fujiwara, and N. Yoshida. 2014.
Isotopomeric characterization of nitrous oxide produced by reaction of enzymes extracted from nitrifying and denitrifying bacteria.
Biogeosciences 11: 2679-2689 --> abstract
70. A. Wang, Y.-T. Fang, D.-X. Chen, K. Koba, A. Makabe, Y.-D. Li, T.-S. Luo, and M. Yoh. 2014.
Variations in nitrogen-15 natural abundance of plant and soil systems in four remote tropical rainforests, southern China.
Oecologia 174: 567-580 --> abstract
69. M. Yano, S. Toyoda, T. Tokida, K. Hayashi, T. Hasegawa, A. Makabe, K. Koba, and N. Yoshida. 2014.
Isotopomer analysis of production, consumption and soil-to-atmosphere emission processes of N2O at the beginning of paddy field irrigation.
Soil Biology and Biochemistry 70: 66-78. --> abstract
68. N. Tokuchi, S. Yoneda, N. Ohte, N. Usui, K. Koba, M. Kuroiwa, H. Toda, and Y. Suwa. 2014.
Seasonal changes and controlling factors of gross N transformation in an evergreen plantation forest in central Japan.
Journal of Forest Research 19: 77-85. --> abstract
2013
67. A. Terada, S. Sugawara. T. Yamamoto, S. Zhou, K. Koba, and M. Hosomi. 2013.
Physiological characteristics of predominant ammonia-oxidizing bacteria enriched from bioreactors with different influent supply regimes.
Biochemical Engineering Journal 79: 153-161. --> abstract
66. T. Nunoura, M. Nishizawa, T. Kikuchi, T. Tsubouchi, M. Hirai, O. Koide, J. Miyazaki, H. Hirayama, K. Koba, and K. Takai. 2013.
Molecular biological and isotopic biogeochemical prognoses of the nitrification-driven dynamic microbial nitrogen cycle in hadopelagic sediments.
Environmental Microbiology 15: 3087-3107. --> abstract
65. Y. Fang, K. Koba, M. Yoh, A. Makabe, and X. Liu. 2013.
Pattern of foliar δ15N and its controls in Eastern Asian forests.
Ecological Research 28: 735-748. --> abstract
64. X.-Y. Liu, K. Koba*, A. Makabe, X.-D. Li, M. Yoh, and C.-Q. Liu. 2013.
Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition.
New Phytologist 199: 407-419. --> abstract
63. X.-Y. Liu, K. Koba*, Y. Takebayashi, C.-Q. Liu, Y.-T. Fang, and M. Yoh. 2013.
Dual N and O isotopes of nitrate in natural plants: first insights into individual variability and organ-specific patterns.
Biogeochemistry 114: 399-411. --> abstract
62. M. Nishizawa, K. Koba, M. Makabe, N. Yoshida, M. Kaneko, S. Hirao, J. Ishibashi, T. Yamanaka, T. Shibuya, T. Kikuchi, M. Hirai, J. Miyazaki, T. Nunoura, and K. Takai. 2013.
Nitrification-driven forms of nitrogen metabolism in microbial mat communities thriving along an ammonium-enriched subsurface geothermal stream.
Geochimica et Cosmochimica Acta 113: 152-173. --> abstract
61. S. Hobara, K. Koba, N. Ae, A. E. Giblin, K. Kushida, and G. R. Shaver. 2013.
Geochemical influences of substrate histories and phosphorus fertilization on solubility of soil organic carbon in arctic tundra ecosystems.
Soil Science Society of America Journal 77(2): 473-481. --> abstract
60. L. Koyama, M. Hirobe, K. Koba, and N. Tokuchi. 2013.
Nitrate-use traits of understory plants as potential regulators of vegetation distribution on a slope in a Japanese cedar plantation.
Plant and Soil 362: 119-134. --> abstract
2012
59. X. Liu, K. Koba*, C.-Q. Liu, X.-D. Li and M. Yoh. 2012.
Pitfalls and new mechanisms in moss isotope bio-monitoring of atmospheric nitrogen deposition
Environmental Science and Technology 46:12557-12566 --> abstract
58. Y. Fang, K. Koba*, A. Makabe, F. Zhu, S. Fan, X. Liu, and M. Yoh. 2012.
Low δ18O values of nitrate produced from nitrification in temperate forest soils.
Environmental Science and Technology 46:8723-8730. --> abstract
57. X. Liu, K. Koba*, M. Yoh, and C.-Q. Liu. 2012.
Nitrogen and oxygen isotope effects of tissue nitrate associated wit nitrate aquisition and utilization in the moss Hypnum plumaeforme.
Functional Plant Biology 39:598-608. --> abstract
56. M. Nakagawa, Y. Ueno, S. Hattori, M. Umemura, A. Yagi, K. Takai, K. Koba, Y. Sasaki, A. Makabe, and N. Yoshida. 2012.
Seasonal change in microbial sulfur cycling in monomictic Lake Fukami-ike.
Limnology and Oceanography 57:974-988. DOI: 10.4319/lo.2012.57.4.0974. --> abstract
55. K. Isobe, K. Koba, Y. Suwa., J. Ikutani, M. Kuroiwa, Y. Fang, M. Yoh, J. Mo, S. Otsuka, and K. Senoo. 2012.
Nitrite transformations in an N-saturated forest soil.
Soil Biology and Biochemistry 52:61–63. --> abstract
54. Y. Mochizuki, K.Koba*, and M. Yoh. 2012.
Strong inhibitory effect of nitrate on atmospheric methane oxidation in forest soils.
Soil Biology and Biochemistry 50:164-166. --> abstract
53. K. Koba, Y. Fang, J. Mo, W. Zhang, X. Lu, L. Liu, T. Zhang, Y. Takebayashi, S. Toyoda, N. Yoshida, K. Suzuki, M. Yoh, and K. Senoo. 2012.
15N natural abundance of the N lost from an N-saturated subtropical forest in southern China.
Journal of Geophysical Research-Biogeosciences, VOL. 117, G02015, 13 PP., 2012 doi:10.1029/2010JG001615 --> abstract
52. S. Hattori, H. Nashimoto, H Kimura, K. Koba, K. Yamada, M. Shimizu, H. Watanabe, M. Yoh, and N. Yoshida. 2012.
Hydrogen and carbon isotope fractionation by thermophilic hydrogenotrophic methanogens from a deep aquifer under coculture with fermenters.
Geochemical Journal 46:193-200. --> abstract
51. K. Isobe, K. Koba, Y. Suwa, J. Ikutani, Y. Fang, M. Yoh, J. Mo, S. Otsuka, and K. Senoo. 2012.
High abundance of ammonia-oxidizing archaea in acidified subtropical forest soils in southern China after long-term N deposition.
FEMS Microbiology Ecology 80:193-203. --> abstract
50. X. Liu, K. Koba*, Y. Takebayashi, C. Liu, Y. Fang, M. Yoh, X. Y. Liu, C. Q. Liu, and Y. T. Fang. 2012.
Preliminary insights into delta 15N and delta 18O of nitrate in natural mosses: a new application of the denitrifier method.
Environmental Pollution 162:48-55. --> abstract
2011
49. K. Isobe, K. Koba, S. Otsuka, and K. Senoo. 2011.
Nitrification and nitrifying microbial communities in forest soils.
Journal of Forest Research 16:351-362. --> abstract
48. Y. Fang, P. Gundersen, R. D. Vogt, K. Koba, F. Chen, X. Y. Chen, and M. Yoh. 2011.
Atmospheric deposition and leaching of nitrogen in Chinese forest ecosystems.
Journal of Forest Research 16:341-350. --> abstract
47. Y. Fang, M. Yoh, K. Koba, W. Zhu, Y. Takebayashi, Y. Xiao, C. Lei, J. Mo, W. Zhang, and X. Lu. 2011.
Nitrogen deposition and forest nitrogen cycling along an urban-rural transect in southern China.
Global Change Biology 17:872-885. --> abstract
46. Y. T. Fang, K. Koba, X. M. Wang, D. Z. Wen, J. Li, Y. Takebayashi, X. Y. Liu, and M. Yoh. 2011.
Anthropogenic imprints on nitrogen and oxygen isotopic composition of precipitation nitrate in a nitrogen-polluted city in southern China.
Atmospheric Chemistry and Physics 11:1313-1325. --> abstract
45. K. Isobe, K. Koba, S. Ueda, K. Senoo, S. Harayama, and Y. Suwa. 2011.
A simple and rapid GC/MS method for the simultaneous determination of gaseous metabolites.
Journal of Microbiological Methods 84:46-51.
--> abstract
44. K. Isobe, Y. Suwa, J. Ikutani, M. Kuroiwa, T. Makita, Y. Takebayashi, M. Yoh, S. Otsuka, K. Senoo, M. Ohmori, and K. Koba*. 2011.
Analytical Techniques for Quantifying 15N/14N of Nitrate, Nitrite, Total Dissolved Nitrogen and Ammonium in Environmental Samples Using a Gas Chromatograph Equipped with a Quadrupole Mass Spectrometer.
Microbes and Environments 26:46-53. --> abstract
43. M. Kuroiwa, K. Koba*, K. Isobe, R. Tateno, A. Nakanishi, Y. Inagaki, H. Toda, S. Otsuka, K. Senoo, Y. Suwa, M. Yoh, R. Urakawa, and H. Shibata. 2011.
Gross nitrification rates in four Japanese forest soils: heterotrophic versus autotrophic and the regulation factors for the nitrification.
Journal of Forest Research 16:363-373. --> abstract
42. Y. Sasaki, K. Koba*, M. Yamamoto, A. Makabe, Y. Ueno, M. Nakagawa, S. Toyoda, N. Yoshida, and M. Yoh. 2011.
Biogeochemistry of nitrous oxide in Lake Kizaki, Japan, elucidated by nitrous oxide isotopomer analysis.
Journal of Geophysical Research-Biogeosciences 116: G04030, doi:10.1029/2010JG001589. --> abstract
[ H. Shibata, H. Toda, Y. Inagaki, R. Tateno, K. Koba, and T. Tange. 2011.
Soil nitrogen dynamics of forest ecosystems under environmental changes.
Journal of Forest Research 16:331-332. --> abstract]
41. H. Shibata, R. Urakawa, H. Toda, Y. Inagaki, R. Tateno, K. Koba, A. Nakanishi, K. Fukuzawa, and A. Yamasaki. 2011.
Changes in nitrogen transformation in forest soil representing the climate gradient of the Japanese archipelago.
Journal of Forest Research 16:374-385. --> abstract
40. Y. Tabayashi, and K. Koba. 2011.
Heterogeneous Atmospheric Nitrogen Deposition Effects Upon the Nitrate Concentration of Stream Waters in a Forested Mountain Area.
Water Air and Soil Pollution 216:105-115. --> abstract
39. S. Toyoda, M. Yano, S.-i. Nishimura, H. Akiyama, A. Hayakawa, K. Koba, S. Sudo, K. Yagi, A. Makabe, Y. Tobari, N. O. Ogawa, N. Ohkouchi, K. Yamada, and N. Yoshida. 2011.
Characterization and production and consumption processes of N2O emitted from temperate agricultural soils determined via isotopomer ratio analysis.
Global Biogeochemical Cycles 25: GB2008, doi:10.1029/2009GB003769. --> abstract
2010
38. H. Kimura, K. Mori, H. Nashimoto, S. Hattori, K. Yamada, K. Koba, N. Yoshida, and K. Kato. 2010.
Biomass production and energy source of thermophiles in a Japanese alkaline geothermal pool.
Environmental Microbiology 12:480-489. --> abstract
37. H. Kimura, H. Nashimoto, M. Shimizu, S. Hattori, K. Yamada, K. Koba, N. Yoshida, and K. Kato. 2010.
Microbial methane production in deep aquifer associated with the accretionary prism in Southwest Japan.
The ISME Journal 4:531-541. --> abstract
Delta15N of soil N and plants in a N-saturated, subtropical forest of southern China.
Rapid Communications in Mass Spectrometry 24:2499-2506. --> abstract
35. N. Ohte, I. Tayasu, A. Kohzu, C. Yoshimizu, K. Osaka, A. Makabe, K. Koba, N. Yoshida, and T. Nagata. 2010.
Spatial distribution of nitrate sources of rivers in the Lake Biwa watershed, Japan: Controlling factors revealed by nitrogen and oxygen isotope values.
Water Resources Research 46: W07505, doi:10.1029/2009WR007871. --> abstract
34. K. Osaka, N. Ohte, K. Koba, C. Yoshimizu, M. Katsuyama, M. Tani, I. Tayasu, and T. Nagata. 2010.
Hydrological influences on spatiotemporal variations of delta15N and delta18O of nitrate in a forested headwater catchment in central Japan: Denitrification plays a critical role in groundwater.
Journal of Geophysical Research-Biogeosciences 115: G02021, doi:10.1029.2009JG000977. --> abstract
33. Y. Takebayashi, K. Koba*, Y. Sasaki, Y. Fang, and M. Yoh. 2010.
The natural abundance of 15N in plant and soil-available N indicates a shift of main plant N resources to NO3- from NH4+ along the N leaching gradient.
Rapid Communications in Mass Spectrometry 24:1001-1008. --> abstract
32. Y. Tobari, K. Koba*, K. Fukushima, N. Tokuchi, N. Ohte, R. Tateno, S. Toyoda, T. Yoshioka, and N. Yoshida. 2010.
Contribution of atmospheric nitrate to stream-water nitrate in Japanese coniferous forests revealed by the oxygen isotope ratio of nitrate.
Rapid Communications in Mass Spectrometry 24:1281-1286. --> abstract
2009
31. M. Itoh, N. Ohte, and K. Koba. 2009.
Methane flux characteristics in forest soils under an East Asian monsoon climate.
Soil Biology & Biochemistry 41:388-395. --> abstract
30. K. Koba, K. Osaka, Y. Tobari, S. Toyoda, N. Ohte, M. Katsuyama, N. Suzuki, M. Itoh, H. Yamagishi, M. Kawasaki, S. J. Kim, N. Yoshida, and T. Nakajima. 2009.
Biogeochemistry of nitrous oxide in groundwater in a forested ecosystem elucidated by nitrous oxide isotopomer measurements.
Geochimica et Cosmochimica Acta 73:3115-3133. --> abstract
29. S. Toyoda, H. Iwai, K. Koba, and N. Yoshida. 2009.
Isotopomeric analysis of N2O dissolved in a river in the Tokyo metropolitan area.
Rapid Communications in Mass Spectrometry 23:809-821. --> abstract
2008
28. M. Itoh, N. Ohte, K. Koba, A. Sugimoto, and M. Tani. 2008.
Analysis of methane production pathways in a riparian wetland of a temperate forest catchment, using delta13C of pore water CH4 and CO2.
Journal of Geophysical Research-Biogeosciences 113: G030005, doi:10.1029/2007JG000647. --> abstract
2007
27. Arai, H., N. Tokuchi, and K. Koba. 2007.
Possible mechanisms leading to a delay in carbon stock recovery after land use change.
Soil Science Society of America Journal 71:1636-1638. --> abstract
26. M. Itoh, N. Ohte, K. Koba, M. Katsuyama, K. Hayamizu, and M. Tani. 2007.
Hydrologic effects on methane dynamics in riparian wetlands in a temperate forest catchment.
Journal of Geophysical Research-Biogeosciences 112: G01019, doi:10.1029/2006JG000240. --> abstract
25. X. Li, H. Masuda, K. Koba, and H. Zeng. 2007.
Nitrogen isotope study on nitrate-contaminated groundwater in the Sichuan Basin, China.
Water Air and Soil Pollution 178:145-156. --> abstract
24. H. Yamagishi, M. B. Westley, B. N. Popp, S. Toyoda, N. Yoshida, S. Watanabe, K. Koba, and Y. Yamanaka. 2007.
Role of nitrification and denitrification on the nitrous oxide cycle in the eastern tropical North Pacific and Gulf of California.
Journal of Geophysical Research-Biogeosciences 112: G02015, doi:10.1029/2006JG000227. --> abstract
2006
23. S. Hobara, C. McCalley, K. Koba, A. E. Giblin, M. S. Weiss, G. M. Gettel, and G. R. Shaver. 2006.
Nitrogen fixation in surface soils and vegetation in an arctic tundra watershed: A key source of atmospheric nitrogen.
Arctic Antarctic and Alpine Research 38:363-372. --> abstract
22. K. Kameda, K. Koba, S. Hobara, T. Osono, and M. Terai. 2006.
Pattern of natural N-15 abundance in lakeside forest ecosystem affected by cormorant-derived nitrogen.
Hydrobiologia 567:69-86. --> abstract
Hydrologic controls on nitrous oxide production and consumption in a forested headwater catchment in central Japan.
Journal of Geophysical Research-Biogeosciences 111: G01013, doi:10.1029/2005JG00026. --> abstract
20. T. Osono, S. Hobara, K. Koba, and K. Kameda. 2006.
Reduction of fungal growth and lignin decomposition in needle litter by avian excreta.
Soil Biology & Biochemistry 38:1623-1630. --> abstract
19. T. Osono, S. Hobara, K. Koba, K. Kameda, and H. Takeda. 2006.
Immobilization of avian excreta-derived nutrients and reduced lignin decomposition in needle and twig litter in a temperate coniferous forest.
Soil Biology & Biochemistry 38:517-525. --> abstract
2005
18. M. Abe, T. Yoshimura, S. Koizumi, N. Hasegawa, T. Osaki, N. Yasukawa, K. Koba, K. Moriya, and T. Sakai. 2005.
Virtual forest: design and evaluation of a walk-through system for forest education.
Journal of Forest Research 10:189-197. --> abstract
17. M. Abe, T. Yoshimura, N. Yasukawa, K. Koba, K. Moriya, and T. Sakai. 2005.
Development and evaluation of a support system for forest education.
Journal of Forest Research 10:43-50. --> abstract
16. S. Hobara, K. Koba, T. Osono, N. Tokuchi, A. Ishida, and K. Kameda. 2005.
Nitrogen and phosphorus enrichment and balance in forests colonized by cormorants: Implications of the influence of soil adsorption.
Plant and Soil 268:89-101. --> abstract
2004
15. Y. Nakajima, H. Shimizu, N. Ogawa, T. Sakamoto, H. Okada, K. Koba, H. Kitazato, and N. Ohkouchi. 2004.
Vertical distributions of stable isotopic compositions and bacteriochlorophyll homologues in suspended particulate matter in saline meromictic Lake Abashiri.
Limnology 5:185-189. --> abstract
2003
14. S. Hasegawa, K. Koba, I. Tayasu, H. Takeda, and H. Haga. 2003.
Carbon autonomy of reproductive shoots of Siberian alder (Alnus hirsuta var. sibirica).
Journal of Plant Research 116:183-188. --> abstract
13. M. Hirobe, K. Koba, and N. Tokuchi. 2003.
Dynamics of the internal soil nitrogen cycles under moder and mull forest floor types on a slope in a Cryptomeria japonica D. Don plantation.
Ecological Research 18:53-64. --> abstract
12. K. Koba, M. Hirobe, L. Koyama, A. Kohzu, N. Tokuchi, K. Nadelhoffer, E. Wada, and H. Takeda. 2003.
Natural N-15 abundance of plants and soil N in a temperate coniferous forest.
Ecosystems 6:457-469. --> abstract
11. Ohte, N., K. Koba, K. Yoshikawa, A. Sugimoto, N. Matsuo, N. Kabeya, and L. Wang. 2003.
Water utilization of natural and planted trees in the semiarid desert of Inner Mongolia, China.
Ecological Applications 13:337-351. --> abstract
10. N. Ohte, N. Tokuchi, M. Katsuyama, S. Hobara, Y. Asano, and K. Koba. 2003.
Episodic increases in nitrate concentrations in streamwater due to the partial dieback of a pine forest in Japan: runoff generation processes control seasonality.
Hydrological Processes 17:237-249.
--> abstract
9. R. Tateno, S. Katagiri, H. Kawaguchi, Y. Nagayama, C. Li, A. Sugimoto, and K. Koba. 2003.
Use of foliar N-15 and C-13 abundance to evaluate effects of microbiotic crust on nitrogen and water utilization in Pinus massoniana in deteriorated pine stands of south China.
Ecological Research 18:279-286.
--> abstract
2002
8. T. Osono, S. Hobara, S. Fujiwara, K. Koba, and K. Kameda. 2002.
Abundance, diversity, and species composition of fungal communities in a temperate forest affected by excreta of the Great Cormorant Phalacrocorax carbo.
Soil Biology & Biochemistry 34:1537-1547.
--> abstract
2001
7. S. Hobara, T. Osono, K. Koba, N. Tokuchi, S. Fujiwara, and K. Kameda. 2001.
Forest floor quality and N transformations in a temperate forest affected by avian-derived N deposition.
Water Air and Soil Pollution 130:679-684.
--> abstract
6. S. Hobara, N. Tokuchi, N. Ohte, K. Koba, M. Katsuyama, S. Kim, and A. Nakanishi. 2001.
Mechanism of nitrate loss from a forested catchment following a small-scale, natural disturbance.
Canadian Journal of Forest Research-Revue Canadienne De Recherche Forestiere 31:1326-1335. --> abstract
2000
5. N. Tokuchi, M. Hirobe, and K. Koba. 2000.
Topographical differences in soil N transformation using 15N dilution method along a slope in a conifer plantation forest in Japan.
Jounral of Forest Research 5: 13-19. --> abstract
4. A. Kohzu, T. Tateishi, A. Yamada, K. Koba, and E. Wada. 2000.
Nitrogen isotope fractionation during nitrogen transport from ectomycorrhizal fungi, Suillus granulatus, to the host plant, Pinus densiflora.
Soil Science and Plant Nutrition 46:733-739. --> abstract
1999
3. A. Kohzu, T. Yoshioka, T. Ando, M. Takahashi, K. Koba, and E. Wada. 1999.
Natural C-13 and N-15 abundance of field-collected fungi and their ecological implications.
New Phytologist 144:323-330.
--> abstract
1998
2. K. Koba, N. Tokuchi, T. Yoshioka, E. Hobbie, and G. Iwatsubo. 1998.
Natural abundance of nitrogen-15 in a forest soil.
Soil Science Society of America Journal 62:778-781.--> abstract
1997
1. K. Koba, N. Tokuchi, E. Wada, T. Nakajima, and G. Iwatsubo. 1997.
Intermittent denitrification: The application of a N-15 natural abundance method to a forested ecosystem.
Geochimica et Cosmochimica Acta 61:5043-5050. --> abstract
------- ------- ------- -------
Peer-reviewerd articles in Japanese (20180129 Updated)
13. 柳井洋介・木庭啓介
モニタリングとモデリングに基づく物質動態広域評価の最前線 ?広域における炭素・窒素・水の動態を探る? 2. どのような観測が広域評価に貢献できるのか
日本土壌肥料学会誌 88(2):147-152 (2017) --> link
12. 木庭啓介
微量溶存窒素化合物の同位体比測定について?最新の測定技術とその応用?
Radioisotopes 66:343-354 (2017) --> link
11. 木庭啓介
広域評価を目指した室内実験および圃場観測：硝化を例とした 実験室とモニタリングのつながりについての小考察
土壌の物理性 122:35-39 (2012) --> link
10. 木庭啓介
安定同位体を用いた窒素循環研究－微生物機能へのアプローチを目指して
極限環境微生物学会誌 Vol. 6 (2007) No. 1 P 52-58. --> link
9. 木庭 啓介、眞壁 明子
安定同位体を用いた流域生態系における窒素循環研究の可能性について
水文・水資源学会誌19: 293-301 (2006)
8. 伊藤雅之、大手信人、勝山正則、木庭啓介、川﨑雅俊、谷誠
温帯森林流域におけるメタンフラックスの時空間変動
水文・水資源学会誌 18:244-256 (2005)
7. 阿部光敏、長谷川直人、木庭啓介、守屋和幸、酒井徹朗
GPS・PDA による自然観察のための資料提示システム
日本教育工学会論文誌 Vol.28 No.1 pp.39-47 (2004)
6. 斉藤友則、木庭啓介、酒井徹朗、亀田佳代子、吉岡崇仁
コンジョイント分析を用いた野生動物問題に対する仮想的対策事前評価 －滋賀県琵琶湖におけるカワウ問題を事例として－
日本評価研究 第2 巻第2 号 79-90 (2002)
5. 松尾奈緒子、大手信人、小杉緑子、木庭啓介
炭素安定同位体比を用いた暖温帯性常緑広葉樹の水利用効率に関する解析
水文・水資源学会誌 15:229-242 (2002)
4. 松尾奈緒子、大手信人、木庭啓介、小杉緑子、壁谷直記、張 国盛、王 林和、吉川 賢
中国内蒙古毛烏素沙地に生息する植物の水利用効率の考察 - 炭素安定同位体比を用いた解析 -
日本緑化工学学会誌 27:68-73 (2001)
3. 木庭啓介、高橋和志、高津文人
安定同位体比を用いた森林生態系における植物ー土壌間の窒素動態研究
日本生態学会誌 49:47-51 (1999)
2. 小川奈々子、木庭啓介、高津文人、和田英太郎
自然生態系における炭素・窒素安定同位体存在比
Radioisotopes 46:632-644 (1997)
1. 木庭啓介
窒素同位体比を用いた森林生態系における窒素循環の把握
Radioisotopes 44:81-82 (1995)
------- ------- ------- -------
Non-reviewed articles in Japanese
1. 木庭啓介，徳地直子，岩坪五郎，和田英太郎. 自然安定同位体比を用いた森林生態系における脱窒過程の検討. 京都大学演習林報告. 京都大学演習林. 66巻. 37-47. 1994.
2. 木庭啓介，徳地直子. 森林生態系における無機態窒素の動態. 遺伝. 裳華房. 51巻. 42-46. 1997.
3. 亀田佳代子，保原 達，大園享司，木庭啓介. カワウによる水域から陸域への物質輸送とその影響. 月刊海洋. 海洋出版. 34巻. 442-448. 2002.
4. 楊 宗興，吉岡崇仁，朴 昊澤，吉田恭司，勝山正則，龍田優美，柴田英昭， 大手信人，杉山浩史，木平英一，川崎雅俊，由水千景，戸田任重，八木一行，服部重昭，田中隆文，佐野方昴，坂井田稔，丹羽智子，田中庸央，壁谷直記，小倉紀雄，蔵治光一郎，戸田浩人，笹賀一郎，徳地直子，保原 達，木庭啓介，武重祐史，M.G.M. Khan，田上英一郎，岡崎亮太，占部城太郎，上村由加里，沖野外輝夫，宝川靖和，徐 明崗，秦 道珠，鄒 長明，朱 建国，蔡 祖聰. 集水域の生物地球化学：その意義と展望. 陸水学雑誌. 日本陸水学会. 64巻. 49-79. 2003.
5. 柴田 英昭，戸田 浩人，稲垣 善之，舘野 隆之輔，木庭 啓介，福澤 加里部. 森林源流域における窒素の生物地球化学過程と渓流水質の形成. 地球環境. 国際環境研究協会. 15巻. 133-143. 2010.
6. 木庭啓介, 楊 宗興. 土壌圏における窒素循環と微生物 N2Oの動態を中心として 6. 同位体解析から見た窒素循環と微生物. 化学と生物. 日本農芸化学会. 49巻. 711-717. 2011.
7. 木庭啓介. 有機野菜は判定できるか 硝酸イオン同位体比の利用可能性について. 現代化学. 552. 38-40. 2017.
------- ------- ------- -------
Books
- E. Wada, I. Tayasu, K. Koba, T. Matsubara, N. O. Ogawa, Y. Yamada, K. Yoshii and A. Sugimoto.
The use of stable isotopes for ecological studies. In:Gopal, B., Pathak, P.S. and Saxena, K. G. (Eds.) Ecology today: An anthology of contemporary ecological research. International Scientific Publishers pp 407-430 . 1998. ※
- 木庭啓介. 炭素循環. 「炭素の辞典」（玉浦 裕 編）. 朝倉書店. 589-599. 2007. ※
- 木庭啓介. 土壌と河川における微生物学的窒素除去プロセスの評価. 「流域環境評価と安定同位体－水循環から生態系まで」（永田 俊、宮島 利宏 編）. 京都大学学術出版会. 199-216. 2008. ※
- 木庭啓介, 高津文人. 流域環境におけるメタン酸化とメタン食物連鎖の評価. 「流域環境評価と安定同位体－水循環から生態系まで」（永田 俊、宮島 利宏 編）. 京都大学学術出版会. 240-241. 2008. ※
- 木庭啓介. アイソトポマー・分子内同位体分布. 「流域環境評価と安定同位体－水循環から生態系まで」（永田 俊、宮島 利宏 編）. 京都大学学術出版会. 388-394. 2008. ※
- 木庭啓介. 溶存有機炭素. 「地球化学実験法」（田中 剛、吉田 尚弘 編）. 培風館. 25-29. 2010. ※
- N. Ohkouchi, I. Tayasu and K. Koba. Earth, Life and Isotopes. Kyoto University Press. pp430. ISBN 978-87698-960-7. 2010. ※
- K. Koba, K. Inagaki, Y. Sasaki, Y. Takebayashi, M. Yoh. Nitrogen isotopic analysis of dissolved inorganic and organic nitrogen in soil extracts. In: N. Ohkouchi, I. Tayasu and K. Koba. (Eds.) Earth, Life and Isotopes. Kyoto University Press. 17-36. 2010. ※
"Wada school" From right to left: Dr. Nao Ohkouchi, Dr. Eitaro Wada, Dr. Ichiro Tayasu and myself (20100809 at Yokohama)