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Jun Matsubayashi

Profile

Affiliation Faculty of Marine Science and Technology / Department of Marine Bioscience
Title Associate Professor
Room Lecture Building 教員研究室 (Extension: 0770-52-3001) (Extension9600)
E-mail matsuj [at] g.fpu.ac.jp ( at = @ ) ( at = @ )
Website
Education Graduate School of Science, Kyoto University
Degree Ph.D. in Science
Academic Societies The Ecological Society of Japan
Career

Research Interest

Research Field Isotope Ecology
Research Summary I am involved in the pursuit of research and methodological advancements with the aim of evaluating the transfer of substances through living organisms and the intricate networks of ecosystems. More specifically, my research is centered on organisms that traverse between diverse ecosystems, such as salmon and birds, organisms that mediate connections between ecosystems, such as brown bears and wolves, and long-distance migratory organisms such as skipjack tuna. In order to gauge the interconnections in the food chain and to track the movement of marine organisms that are not easily observable, my research primarily employs the technique of isotope analysis.
Keywords Food webs, migration, isotopes, nutrient cycles

Selected Publications

Peer-reviewed articles
[34] Suetsugu, K., Matsubayashi, J., Okada, H. 2026. Isotopic and molecular evidence for contrasting fungal associations in two Epipogium orchids in cool-temperate Japan. Mycorrhiza 36: 40.
[33] Suetsugu, K., Yoshimizu, C., Matsubayashi, J., Tayasu, I. 2026. Phenylalanine 15N enrichment likely indicates fungal‐derived organic nutrient acquisition in mycoheterotrophic plants across fungal guilds. New Phytologist 250: 3990-4001.
[32] Matsubayashi, J., Osada, Y., Kimura, K., Aoki, Y., Okazaki, M., Senda, T., Ueda, Y., Matsubara, N., Tsuda, Y. 2025. Fine-scale reconstruction of pelagic fish migration by iso-logging of eye lens. Methods in Ecology and Evolution, 17: 77-84.
[31] Matsubayashi, J., Miura, K., Yamamori, E., Arimoto, Y., Yoshimizu, C., Tayasu, I., Tsuruga, H. 2025. Multiscale dietary analysis of brown bears in Hokkaido, Japan. Journal of Wildlife Management, 89: e70047.
[30] Miura, K., Matsubayashi, J., Yoshimizu, C., Hino, T., Shirane, Y., Mano, T., Tsuruga, H., Tayasu, I. 2025. A novel method for fine-scale retrospective isotope analysis in mammals using eye lenses. Ecosphere, 16: e70276.
[29] Shiga, A., Matsubayashi, J., Ogawa, N. O., Ohkouchi, N., Iwai, N. 2025. Assessing the applicability of sequential eye lens stable isotope analysis for reconstructing dietary histories in amphibians. Limnology and Oceanography: Methods, 23: 336–345.
[28] Suetsugu, K., Yagi, R., Okada, H., Matsubayashi, J. 2025. The tiny-leaved orchid Disperis neilgherrensis primarily obtains carbon from decaying litter via saprotrophic Ceratobasidium. Mycorrhiza, 35: 9.
[27] Hasegawa, E. A., Matsubayashi, J., Tayasu, I., Goto, T., Inoue, H., Rossberg, A. G., Yoshimizu, C., Hasegawa, M., Akasaka, T. 2025. Isotope analysis of birds’ eye lens provides early-life information. Progress in Earth and Planetary Science, 12: 9.
[26] Suetsugu, K., Matsubayashi, J., Okada, H. 2024. Stable isotope signatures illuminate diverse nutritional strategies in rhizoctonias and their orchid partners. Plant, Cell & Environment, 48: 792–804.
[25] Matsubayashi, J., Tsutaya, T., Sato, T. 2024. Retrospective isotope analysis of ancient remains to distinguish between tamed and wild animals. Archaeological and Anthropological Sciences, 16: 138.
[24] Matsubayashi, J., Katsuya, K., Ohkouchi, N., Ogawa, N.O., Ishikawa, N.F., Chikaraishi, Y., Tsuda, Y., Minami, H. 2022. Using geostatistical analysis for simultaneous estimation of isoscapes and ontogenetic shifts in isotope ratios of highly migratory marine fish. Frontiers in Marine Science, 9: 1049056.
[23] Suetsugu, K., Matsubayashi, J. 2022. Foliar chlorophyll concentration modulates the degree of fungal exploitation in a rhizoctonia-associated orchid. Journal of Experimental Botany, 73: 4204–4213.
[22] Ishikawa, N. F., Tadokoro, K., Matsubayashi, J., Ohkouchi, N. 2022. Biomass Pyramids of Marine Mesozooplankton Communities as Inferred From Their Integrated Trophic Positions. Ecosystems (in press) doi: https://doi.org/10.1007/s10021-022-00753-w.
[21] 佐藤孝雄, 松林順, 米田穣. 2022. 羅臼町オタフク岩洞窟と北見市中ノ島遺跡から出土したヒグマ遺体の放射性炭素年代 ―「熊送り」儀礼の起源と前近代の挙行形態をめぐって―. 動物考古学, 39: 31-43.
[20] Osada, Y., Matsubayashi, J., Tayasu, I. 2021. Diagnosing underdetermination in stable isotope mixing models. PLOS ONE, 16: e0257818.
[19] Suetsugu, K., Matsubayashi, J. 2021. Subterranean morphology modulates the degree of mycoheterotrophy in a green orchid Calypso bulbosa exploiting wood-decaying fungi. Functional Ecology, (in press: https://doi.org/10.1111/1365-2435.13864).
[18] Sakiyama, T., Morimoto, J., Matsubayashi, J., Furukawa, Y., Kondo, M., Tsuruga, H., Mano, T., Nakamura, F. 2021. Factors influencing lifespan dependency on agricultural crops by brown bears. Landscape and Ecological Engineering, 17: 351-362.
[17] Suetsugu, K., Yamato, M., Matsubayashi, J., Tayasu, I. 2020. Partial and full mycoheterotrophy in green and albino phenotypes of the slipper orchid Cypripedium debile. Mycorrhiza, 31: 301-312.
[16] Suetsugu, K., Matsubayashi, J. 2020. Evidence for mycorrhizal cheating in Apostasia nipponica, an early-diverging member of the Orchidaceae. New Phytologist, 229: 2302-2310.
[15] Suetsugu, K., Matsubayashi, J., Tayasu, I. 2020. Use of radiocarbon for assessing the mycorrhizal status of mycoheterotrophic plants. Plant Signaling & Behavior, 15: 1785667.
[14] Shutoh, K. Tajima, Y., Matsubayashi, J., Tayasu, I., Kato, S., Shiga, T., Suetsugu, K. 2020. Evidence for newly discovered albino mutants in a pyroloid: implication for the nutritional mode in the genus Pyrola. American Journal of Botany, 107: 650-657.
[13] Suetsugu, K., Matsubayashi, J., Ogawa, N. O., Murata, S., Sato, R., Tomimatsu, H. 2020. Isotopic evidence of arbuscular mycorrhizal cheating in a grassland gentian species. Oecologia, 192: 929–937.
[12] Matsubayashi, J., Osada, Y., Tadokoro, K., Abe, Y., Yamaguchi, A., Shirai, K., Honda, K., Yoshikawa, C., Ogawa, N. O., Ohkouchi, N., Ishikawa, N. F., Nagata, T., Miyamoto, H., Nishino, S., Tayasu, I. 2020. Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids. Ecology Letters, 23: 881–890.
[11] Suetsugu, K., Matsubayashi, J., Tayasu, I. 2020. Some mycoheterotrophic orchids depend on carbon from dead wood: Novel evidence from a radiocarbon approach. New Phytologist, 227: 1519–1529.
[10] Suetsugu, K., Yamato, M., Matsubayashi, J., Tayasu, I. 2019. Comparative study of nutritional mode and mycorrhizal fungi in green and albino variants of Goodyera velutina, an orchid mainly utilizing saprotrophic rhizoctonia. Molecular Ecology, 28: 4290–4299.
[9] Matsubayashi, J., Tayasu, I. 2019. Collagen turnover and isotopic records in cortical bone. Journal of Archaeological Science, 106: 37–44.
[8] Matsubayashi, J., Umezawa, Y., Matsuyama, M., Kawabe, R., Mei, W., Wan, X., Shimomae, A., Tayasu, I. 2019. Using segmental isotope analysis of teleost fish vertebrae to estimate trophic discrimination factors of bone collagen. Limnology and Oceanography: Methods, 17: 87–96.
[7] Saitoh, Y., Nakano, T., Shin, K., Matsubayashi, J., Kato, Y., Amakawa, H., Osada, Y., Yoshimizu, C., Okuda, N., Amano, Y., Togashi, H., Kurita, Y., Tayasu, I. 2018. Utility of Nd isotope ratio as a tracer of marine animals: regional variation in coastal seas and causal factors. Ecosphere, 9: e02365.
[6] Matsubayashi, J., Saitoh, Y., Osada, Y., Uehara, Y., Habu, J., Sasaki, T., Tayasu, I. 2017. Incremental analysis of vertebral centra can reconstruct the stable isotope chronology of teleost fishes. Methods in Ecology and Evolution, 8: 1755–1763.
[5] Matsubayashi, J., Ohta, T., Takahashi, O., Tayasu, I. 2017. Reconstruction of the extinct Ezo wolf's diet. Journal of Zoology, 302: 88–93.
[4] Matsubayashi, J., Tayasu, I., Morimoto, J.O., Mano, T. 2016. Testing for a predicted decrease in body size in brown bears (Ursus arctos) based on a historical shift in diet. Canadian Journal of Zoology, 94: 489–495.
[3] Matsubayashi, J., Otsubo, K., Morimoto, J.O., Nakamura, F., Nose, T., Tayasu, I. 2016. Feeding habits may explain the morphological uniqueness of brown bears on Etorofu Island, Southern Kuril Islands in East Asia. Biological Journal of the Linnean Society, 119: 99–105.
[2] Matsubayashi, J., Morimoto, J. O., Tayasu, I., Mano, T., Nakajima, M., Takahashi, O., Kobayashi, K., Nakamura, F. 2015. Major decline in marine and terrestrial animal consumption by brown bears (Ursus arctos). Scientific Reports 5: 9203.
[1] Matsubayashi, J., Morimoto, J., Mano, T., Aryal, A., Nakamura, F. 2014. Using stables isotopes to understand the feeding ecology of the Hokkaido brown bear (Ursus arctos) in Japan. Ursus, 25: 87–97.

Community Engagement

Educational Activites

Classes Animal Ecology, Experiments in Chemistry Introductory
Office Hour 9:00-17:45
Available Topics Ecological studies using isotope ratios of light elements (such as migration, food web analysis, diet analysis).
Ecological research using spatiotemporal data, including presence/absence and population counts.
Chemical analysis of archival samples which are held in museums and other similar institutions.

Additional Information