title
Photograph Name plate f_logo.jpg RG.png aori.jpg
Atmosphere and Ocean Research Institute, Room 472
The University of Tokyo (Kashiwa Campus)
Kashiwanoha 5-1-5, Kashiwa 277-8564, Japan
FAX: +81 (0)4 7136 6085 / Mobile: +81 (0)80 3248 6127
>>> Japanese web site
ongoing_research.png
  • Carbon cycle and benthic food web of seagrass meadows and mangroves
    1. Evaluation of ecosystem functions in the carbon cycle
    2. Geophysical and biochemical mechanism for preservation of organic matter
    3. Export production and fate of organic carbon in the outer ocean
    4. Benthic detrital food web and its response to global environmental change
  • Nutrient dynamics and systems ecology of coral reefs and seagrass meadows
    1. Isotope biogeochemistry and food web analysis
    2. Influence of atmospheric nitrogen deposition and ocean acidification
    3. Symbiotic interactions between invertebrates and microorganisms
  • Stable isotope approach to environmental and ecological analyses
    1. Specific biochemical/isotopic/genetic biomarkers for source primary producers
    2. Use of DIC and water isotope signatures for ecosystem analysis
    3. Phosphate oxygen isotope distribution in coastal ecosystems
    4. Application of isotope labelling techniques to trophic analysis
societies.png
degree_award.png
Birth: September 8, 1965
1988.3 B.Sc. at Kyoto University, Faculty of Science (Department of Zoology)
1990.3 M.Sc. at Kyoto University, Graduate School of Science (Otsu Hydrobiological Station)
1993.3 D.Sc. at Kyoto University, Graduate School of Science (Center for Ecological Research)
1993.4 JSPS Fellow (Center for Ecological Research, Kyoto University)
1995.7 COE Postdoctoral Researcher (Ocean Research Institute, The University of Tokyo)
1997.4 JST Fellow (CREST)
1998.11 Assistant Professor at Ocean Research Institute
publications.png
Seagrass meadows and mangroves
  1. Miyajima T, Hori M, Hamaguchi M, Shimabukuro H, Adachi H, Yamano H, Nakaoka M (2015) Geographic variability in organic carbon stock and accumulation rate in sediments of East and Southeast Asian seagrass meadows. Global Biogeochemical Cycles 29: 397-415
  2. Tanaka Y, Go GA, Watanabe A, Miyajima T, Nakaoka M, Uy WH, Nadaoka K, Watanabe S, Fortes MD (2014) 17-year change in species composition of mixed seagrass beds around Santiago Island, Bolinao, the northwestern Philippines. Marine Pollution Bulletin 88: 81-85
  3. Miyajima T, Tsuboi Y, Tanaka Y, Koike I (2009) Export of inorganic carbon from two Southeast-Asian mangrove forests to adjacent estuaries as estimated by the stable isotope composition of dissolved inorganic carbon. Journal of Geophysical Research - Biogeosciences 114, G01024, doi:10.1029/2008JG000861
  4. Tanaka Y, Miyajima T, Yamada K, Hori M, Hasegawa N, Umezawa Y, Koike I (2008) Specific growth rate as a determinant of carbon isotope composition of a temperate seagrass Zostera marina. Aquatic Botany 89: 331-336
  5. Nakamura Y, Horinouchi M, Shibuno T, Tanaka Y, Miyajima T, Koike I, Kurokura H, Sano M (2008) Evidence of ontogenetic migration from mangroves to coral reefs by black tail snapper Lutjanus fulvus: a stable isotope approach. Marine Ecology Progress Series 355: 257-266
  6. Miyajima T, Suzumura M, Umezawa Y, Koike I (2001) Microbiological nitrogen transformation in carbonate sediments of a coral-reef lagoon and associated seagrass beds. Marine Ecology Progress Series 217: 273-286
  7. Miyajima T, Koike I, Yamano H, Iizumi H (1998) Accumulation and transport of seagrass-derived organic matter in the sediment of coral reef flat of Green Island, Great Barrier Reef. Marine Ecology Progress Series 175: 251-259
Coral reef science
  1. Miyajima T, Morimoto N, Nakamura T, Yamamoto T, Watanabe A, Nadaoka K (2016) Atmospheric deposition of reactive nitrogen as a regional-scale eutrophication stress on the coral reef ecosystem. In: Kayanne H (ed.) Coral Reef Science: Strategy for Ecosystem Symbiosis and Coexistence with Humans under Multiple Stresses. Springer, pp.95-101.
  2. Yamano H, Hata H, Miyajima T, Nozaki K, Kato K, Negishi A, Tamura M, Kayanne H (2014) Water circulation in a fringing reef and implications for coral distribution and resilience. In: Nakano S, Yahara T, Nakashizuka T (eds.) The biodiversity observation network in the Asia-Pacific region: Integrative observations and assessments of Asian biodiversity. Springer, pp.275-293.
  3. Thibodeau B, Miyajima T, Tayasu I, Wyatt A, Watanabe A, Morimoto N, Yoshimizu C, Nagata T (2013) Heterogeneous dissolved organic nitrogen supply over a coral reef: First evidence from nitrogen stable isotope ratios. Coral Reefs 32: 1103-1110
  4. Watanabe A, Yamamoto T, Nadaoka K, Maeda Y, Miyajima T, Tanaka Y (2012) Spatio-temporal variations of CO2 flux in a fringing reef simulated with a newly developed carbonate system dynamics model. Coral Reefs 32: 239-254
  5. Tanaka Y, Ogawa H, Miyajima T (2011) Production and bacterial decomposition of dissolved organic matter in a fringing coral reef. Journal of Oceanography 67: 427-437
  6. Tanaka Y, Miyajima T, Watanabe A, Nadaoka K, Yamamoto T, Ogawa H (2011) Distribution of dissolved organic carbon and nitrogen in a coral reef. Coral Reefs 30: 533-541
  7. Tanaka Y, Ogawa H, Miyajima T (2011) Bacterial decomposition of coral mucus as evaluated by long-term and quantitative evaluation. Coral Reefs 30: 443-449
  8. Miyajima T, Umezawa Y (2010) Stable isotope composition of nitrogen (δ15N) as a tool for investigating nitrogen cycling in coral reef ecosystems. p. 197-222. In: Ohkouch N et al. (eds.) Earth, Life, and Isotopes, Kyoto University Press.
  9. Osawa Y, Fujita K, Umezawa Y, Kayanne H, Ide Y, Nagaoka T, Miyajima T, Yamano H (2010) Human impacts on large benthic foraminifers near a densely populated area of Majuro Atoll, Marshall Islands. Marine Pollution Bulletin 60: 1279-1287
  10. Tanaka Y, Ogawa H, Miyajima T (2010) Effects of nutrient enrichment on the release of dissolved organic carbon and nitrogen by the scleractinian coral Montipora digitata. Coral Reefs 29: 675-682
  11. Tanaka Y, Miyajima T, Umezawa Y, Hayashibara T, Ogawa H, Koike I (2009) Net release of dissolved organic matter by the scleractinian coral Acropora pulchra. Journal of Experimental Marine Biology and Ecology 377: 101-106
  12. Tanaka Y, Miyajima T, T, Ogawa H (2009) Bacterial degradability of dissolved organic carbon in coral mucus. Proceedings of the 11th International Coral Reef Symposium 945-949
  13. Umezawa Y, Miyajima T, Koike I (2008) Stable nitrogen isotope composition in sedimentary organic matter as a potential proxy of nitrogen sources for primary producers at a fringing coral reef. Journal of Oceanography 64: 899-909
  14. Tanaka Y, Miyajima T, Koike I, Hayashibara T, Ogawa H (2008) Production of dissolved and particulate organic matter by the reef-building corals Porites cylindrica and Acropora pulchra. Bulletin of Marine Science 82: 237-245
  15. Miyajima T, Tanaka Y, Koike I, Yamano H, Kayanne H (2007) Evaluation of spatial correlation between nutrient exchange rates and benthic biota in a reef-flat ecosystem by GIS-assisted flow-tracking. Journal of Oceanography 63: 643-659
  16. Umezawa Y, Miyajima T, Tanaka Y, Koike I (2007) Variation in internal δ15N and δ13C distributions and their bulk values in the brown macroalga Padina australis growing in subtropical oligotrophic waters. Journal of Phycology 43: 437-448
  17. Miyajima T, Hata H, Umezawa Y, Kayanne H, Koike I (2007) Distribution and partitioning of nitrogen and phosphorus in a fringing reef lagoon of Ishigaki Island, Northwestern Pacific. Marine Ecology Progress Series 341: 45-57
  18. Tanaka Y, Miyajima T, Koike I, Hayashibara T, Ogawa H (2007) Imbalanced coral growth between organic tissue and carbonate skeleton brought by nutrient enrichment. Limnology and Oceanography 52: 1139-1146
  19. Tanaka Y, Miyajima T, Koike I, Hayashibara T, Ogawa H (2006) Translocation and conservation of organic nitrogen within the coral-zooxanthella symbiotic system of Acropora pulchra, as demonstrated by dual isotope-labeling techniques. Journal of Experimental Marine Biology and Ecology 336: 110-119
  20. Tanaka Y, Miyajima T, Umezawa Y, Fukuda H, Koike I, Ogawa H, Hayashibara T (2004): Effects of nitrate enrichment on release of dissolved organic carbon and nitrogen from zooxanthellate coral, Acropora pulchra and Porites cylindrica. Proceedings of the 10th International Coral Reef Symposium p.925-931
  21. Umezawa Y, Miyajima T, Kayanne H, Koike I (2002) Significance of groundwater nitrogen discharge into coral reefs at Ishigaki Island, southwest of Japan. Coral Reefs 21:346-356
  22. Umezawa Y, Miyajima T, Yamamuro M, Kayanne H, Koike I (2002) Fine-scale mapping of land-derived nitrogen in coral reefs by δ15N in macroalgae. Limnology and Oceanography 47: 1405-1416
  23. Suzumura M, Miyajima T, Hata H, Umezawa Y, Kayanne H, Koike I (2002) Cycling of phosphorus maintains the production of microphytobenthic communities in carbonate sediments of a coral reef. Limnology and Oceanography 47: 771-781
  24. Yamano H, Miyajima T, Koike I (2000) Importance of foraminifera for the formation and maintenance of a coral sand cay: Green Island, Australia. Coral Reefs 19: 51-58
Sediment and soil biogeochemistry
  1. Miyajima T, Hori M, Hamaguchi M, Shimabukuro H, Yoshida G (2017) Geophysical constraints for organic carbon sequestration capacity of Zostera marina seagrass meadows and surrounding habitats. Limnology and Oceanography 62: 954-972
  2. Miyajima T (2015) Abiotic versus biotic immobilization of inorganic nitrogen in sediment as a potential pathway of nitrogen sequestration from coastal marine ecosystems. Geochemical Journal 49: 453-468
  3. Kohzu A, Imai A, Miyajima T, Fukushima T, Matsushige K, Komatsu K, Kawasaki N, Miura S, Sato T (2011) Direct evidence for nitrogen isotope discrimination during sedimentation and early diagenesis in Lake Kasumigaura, Japan. Organic Geochemistry 42:173-183
  4. Adachi H, Yamano H, Miyajima T, Nakaoka M (2010) A simple and robust method for coring unconsolidated sediment in shallow water. Journal of Oceanography 66: 865-872
  5. Miyajima T, Ogawa H, Koike I (2001) Alkali-extractable polysaccharides in marine sediments: Abundance, molecular size distribution, and monosaccharide composition. Geochimica et Cosmochimica Acta 65: 1455-1466
  6. Miyajima T, Wada E, Hanba YT, Vijarnsorn P (1997) Anaerobic mineralization of indigenous organic matters and methanogenesis in tropical wetland soils. Geochimica et Cosmochimica Acta 61: 3739-3751
  7. Miyajima T (1994) Mud-water fluxes of inorganic nitrogen and manganese in the pelagic region of Lake Biwa: Seasonal dynamics and impact on the hypolimnetic metabolism. Archiv für Hydrobiologie 130: 303-324 [PDF]
Coastal ecosystems in general
  1. Morimoto N, Umezawa Y, San Diego-McGlone, ML, Watanabe A, Siringan FP, Tanaka Y, Regino GL, Miyajima T (2017) Spatial dietary shift in bivalves from embayment with river discharge and mariculture activities to outer seagrass beds in northwestern Philippines. Marine Biology 164
  2. Ferrera CM, Watanabe A, Miyajima T, San Diego-McGlone ML, Morimoto N, Umezawa Y, Herrera E, Tsuchiya T, Yoshikai M, Nadaoka K (2016) Phosphorus as a driver of nitrogen limitation and sustained eutrophic conditions in Bolinao and Anda, Philippines, a mariculture-impacted tropical coastal area. Marine Pollution Bulletin 105:237-248
  3. Watai M, Nakamura Y, Honda K, Bolisay KO, Miyajima T, Nakaoka M, Fortes MD (2015) Diet, growth, and abundance of two seagrass bed fishes along a pollution gradient caused by milkfish farming in Bolinao, northwestern Philippines. Fisheries Science 81: 43-51
  4. Fortes MD & Nadaoka K (eds.), Coastal Ecosystem Conservation and Adaptive Management (CECAM) Approach Guidebook, 241p, published by JICA-JST SATREPS on Feb 2015 (one of 15 principal contributors; PDF available from CECAM Web site)
  5. Takayanagi H, Asami R, Abe O, Kitagawa H, Miyajima T, Iryu Y (2012) Carbon- and oxygen-isotope compositions of a deep-water modern brachiopod Campagea japonica collected off Aguni-jima, Central Ryukyu Islands, southwestern Japan. Geochemical Journal 46: 77-87
  6. Sugimoto R, Kasai A, Miyajima T, Fujita K (2010) Modeling phytoplankton production in Ise Bay, Japan: use of nitrogen isotopes to identify dissolved inorganic nitrogen sources. Estuarine, Coastal and Shelf Science 86: 450-466
  7. Sugimoto R, Kasai A, Miyajima T, Fujita K (2009) Controlling factors of seasonal variation in the nitrogen isotope ratio of nitrate in a eutrophic coastal environment. Estuarine, Coastal and Shelf Science 85: 231-240
  8. Sugimoto R, Kasai A, Miyajima T, Fujita K (2009) Transport of oceanic nitrate from the continental shelf to the coastal basin in relation to the path of the Kuroshio. Continental Shelf Research 29: 1678-1688
  9. Sugimoto R, Kasai A, Miyajima T, Fujita K (2009) Nitrogen isotope ratios of nitrate as a clue to the origin of nitrogen on the Pacific coast of Japan. Continental Shelf Research 29: 1303-1309
  10. Sugimoto R, Kasai A, Miyajima T, Fujita K (2008) Nitrogen isotopic discrimination by water column nitrification in a shallow coastal environment. Journal of Oceanography 64: 39-48
  11. Sato T, Miyajima T, Ogawa H, Umezawa Y, Koike I (2006) Temporal variability of stable carbon and nitrogen isotopic composition of size-fractionated particulate organic matter in the hypertrophic Sumida River Estuary of Tokyo Bay, Japan. Estuarine, Coastal and Shelf Science 68: 245-258
  12. Yamasaki A, Fukuda H, Fukuda R, Miyajima T, Nagata T, Ogawa H, Koike I (1998) Submicron particles in northwest Pacific coastal environments: Abundance, size distribution, and biological origins. Limnology and Oceanography 43: 536-542
Advanced isotope techniques
  1. Ferrera CM. Miyajima T, Watanabe A, Umezawa Y, Morimoto N, San Diego-McGlone, ML, Nadaoka K (2015) Variation in oxygen isotope ratio of dissolved orthophosphate induced by uptake process in natural coral holobionts. Coral Reefs 35: 655-668
  2. Takayanagi H, Asami R, Otake T, Abe O, Miyajima T, Kitagawa H, Iryu Y (2015) Quantitative analysis of intraspecific variations in the carbon and oxygen isotope compositions of the modern cool-temperate brachiopod Terebratulina crossei. Geochimica et Cosmochimica Acta 170: 301-320
  3. Maki K, Ohkouchi N, Chikaraishi Y, Fukuda H, Miyajima T, Nagata T (2014) Influence of nitrogen substrates and substrate C:N ratios on the nitrogen isotopic composition of amino acids from the marine bacterium Vibrio harveyi. Geochimica et Cosmochimica Acta 140: 521-530
  4. Takayanagi H, Asami R, Abe O, Miyajima T, Kitagawa H, Sasaki K, Iryu Y (2013) Intraspecific variations in carbon- and oxygen-isotope compositions of a brachiopod Basiliola lucida collected off Okinawa-jima, southwestern Japan. Geochim Cosmochim Acta 115: 115-136
  5. Miyajima T, Tanaka Y, Koike I (2005) Determining 15N enrichment of dissolved organic nitrogen in environmental waters by gas chromatography/negative-ion chemical ionization mass spectrometry. Limnology and Oceanography: Methods 3: 164-173
  6. Miyajima T, Yamada Y, Hanba YT, Yoshii K, Koitabashi T, Wada E (1995) Determining the stable isotope ratio of total dissolved inorganic carbon in lake water by use of the GC/C/IRMS. Limnology and Oceanography 40: 994-1000
Freshwater biogeochemistry
  1. Maki K, Kim C, Yoshimizu C, Tayasu I, Miyajima T, Nagata T (2010) Autochthonous origin of semi-labile dissolved organic carbon in a large monomictic lake (Lake Biwa): Carbon stable isotopic evidence. Limnology 11: 143-153
  2. Miyajima T, Yoshimizu C, Tsuboi Y, Tanaka Y, Tayasu I, Nagata T, Koike I (2009) Longitudinal distribution of nitrate δ15N and δ18O in two contrasting tropical rivers: Implications for instream nitrogen cycling. Biogeochemistry 95: 243-260
  3. Kohzu A, Miyajima T, Tayasu I, Yoshimizu C, Hyodo F, Matsui K, Nakano T, Wada E, Fujita N, Nagata T (2008) Use of stable nitrogen isotope signatures of riparian macrophytes as an indicator of anthropogenic N inputs to river ecosystems. Environmental Science and Technology 42: 7837-7841
  4. Miyajima T, Yamada Y, Nakajima T, Wada E, Koitabashi T, Hanba YT, Yoshii K (1997) Distribution of greenhouse gases, nitrite, and δ13C of dissolved inorganic carbon in Lake Biwa: Implication for hypolimnetic metabolism. Biogeochemistry 36: 205-221
  5. Miyajima T, Nakano S, Nakanishi M (1995) Planktonic diatoms in pelagic silicate cycle in Lake Biwa. Japanese Journal of Limnology 56: 211-220
  6. Miyajima T, Nakanishi M, Nakano S, Tezuka Y (1994) An autumnal bloom of the diatom Melosira granulata in a shallow eutrophic lake: physical and chemical constraints on its population dynamics. Archiv für Hydrobiologie 130: 143-162 [PDF]
  7. Nakano S, Miyajima T, Nakanishi M, Tezuka Y (1993) Abundance of algal picoplankton and heterotrophic flagellates in the south basin of Lake Biwa, with special attention to nutrient levels. Annual Report of Interdisciplinary Research Institute of Environmental Sciences 12: 55-63
  8. Hirayama A, Nakanishi M, Miyajima T, Nakano S (1993) Light environment and photosynthesis in the south basin of Lake Biwa. Verhandlungen - Internationale Vereinigung für Theoretische und Angewandte Limnologie 25: 811-816
  9. Miyajima T (1992) Production of Metallogenium-like particles by heterotrophic manganese-oxidizing bacteria collected from a lake. Archives of Microbiology 158: 100-106
  10. Miyajima T (1992) Reductive dissolution of manganese coupled to mineralization in lake water/sediment microcosms. Memoirs of Faculty of Science of Kyoto University Series B 15: 15-27 [PDF]
  11. Nakanishi M, Miyajima T, Nakano S, Tezuka Y (1992) Studies on the occurrence of Anabaena and Microcystis blooms in Akanoi Bay of the south basin of Lake Biwa, with special attention to nutrient levels. Annual Reports of Interdisciplinary Research Institute of Environmental Sciences 11: 67-75
  12. Miyajima T (1992) Biological manganese oxidation in a lake: II. A thermodynamic consideration of the habitat utilization of Metallogenium sp. Archiv für Hydrobiologie 124: 411-426 [PDF]
  13. Miyajima T (1992) Biological manganese oxidation in a lake: I. Occurrence and distribution of Metallogenium sp. and its kinetic properties. Archiv für Hydrobiologie 124: 317-335 [PDF]
  14. Miyajima T (1992) Recycling of nitrogen and phosphorus from the particulate organic matter associated with the proliferation of bacteria and microflagellates. Japanese Journal of Limnology 53: 133-138
  15. Miyajima T (1992) Decomposition activity and nutrient regeneration rates in the hypolimnion of the north basin of Lake Biwa. Japanese Journal of Limnology 53: 65-73
Terrestrial ecosystems
  1. Kohzu A, Miyajima T, Tateishi T, Watanabe T, Takahashi M, Wada E (2007) Dynamics of 15N natural abundance in wood decomposing fungi and their ecophysiological implications. Isotopes in Environmental and Health Studies 43: 83-94
  2. Kohzu A, Miyajima T, Tateishi T, Watanabe T, Takahashi M, Wada E (2005) Dynamics of 13C natural abundance in wood decomposing fungi and their ecophysiological implications. Soil Biology and Biochemistry 37: 1598-1607
  3. Yoshioka T, Ueda S, Miyajima T, Wada E, Yoshida N, Sugimoto A, Vijarnsorn P, Boonprakub S (2002) Biogeochemical properties of a tropical swamp forest ecosystem in southern Thailand. Limnology 3: 51-59
  4. Ueda S, Go, CU, Yoshioka T, Yoshida N, Wada E, Miyajima T, Sugimoto A, Boontanon N, Vijarnsorn P, Boonprakub S (2000) Dynamics of dissolved O2, CO2, CH4, and N2O in a tropical coastal swamp in southern Thailand. Biogeochemistry 49: 191-215
  5. Miyajima T, Wada E (1999) Sulfate-induced isotopic variation in biogenic methane from tropical swamp without anaerobic methane oxidation. Hydrobiologia 382: 113-118

All Rights Reserved, Copyright 2002-17
Toshihiro Miyajima, Atmosphere and Ocean Research Institute, The University of Tokyo
Last modified: 6 May 2017