Hiroyuki Muraoka, Ph.D.

River Basin Research Center, Gifu University
1-1 Yanagido, Gifu, 501-1193 Japan
e-mail: muraoka at green.gifu-u.ac.jp

B.S. - University of Tsukuba - Biological Sciences (Plant ecology) - 1994
M.S. - University of Tsukuba - Environmental Sciences (Plant ecology) - 1996
Ph.D. - University of Tsukuba - Biological Sciences (Plant ecology) - 1999

Academic positions
1998 - 2000
Post-doc Research Fellow of JSPS, University of Tsukuba
2000 - 2003
Post-doc Research Fellow of JSPS, Gifu University
2003 -
Post-doc research fellow, Institute for Basin Ecosystem Studies, Gifu University
2005 -
Associate Professor, River Basin Research Center, Gifu University
2008 -
Professor, River Basin Research Center, Gifu University

Research interests

1 Acquisition and use of light and water by the plants for their growth and survival in natural habitats.

(1) Adaptive significance of morphological and physiological plasticity in deciduous forest understory herb, Arisaema heterophyllum (Araceae).
(2) Role of leaf display and leaf gas exchange characteristics in Aster kantoens in gravelly floodplain habitat.
(3) Plasticity in leaf display and leaf physiology in deciduous tree seedlings

2 Ecophysiological role of plants in ecosystem carbon cycling

(1) Ecophysiological role of canopy and understory species in forest carbon cycling. (2) Carbon cycling and balance in a high arctic polar semi-desert


Original papers
  1. Muraoka H., Tang Y., Koizumi H. and Washitani I.(1997) Combined effects of light and water availability on photosynthesis and growth of Arisaema heterophyllum in the forest understory and an open site. Oecologia 112:26-34 Abstract

  2. Muraoka H., Takenaka A., Tang Y., Koizumi H. and Washitani I. (1998) Flexible leaf orientations of Arisaema heterophyllum maximize light capture in a forest understorey and avoid excess irradiance at a deforested site. Annals of Botany 82:297-307 Abstract

  3. Muraoka H., Tang Y., Terashima I., Koizumi H. and Washitani I. (2000) Contributions of diffusional limitation, photoinhibition and photorespiration to the midday depression of photosynthesis in Arisaema heterophyllum in the natural high light. Plant, Cell and Environment 23: 235-250 Abstract

  4. Matsumoto J., Muraoka H. and Washitani I. (2000) Ecophysiological mechanisms of an endangered species Aster kantoensis to withstand high light and heat stresses of the gravelly floodplain. Annals of Botany 86: 777-785 Abstract

  5. Matsumoto J., Muraoka H. and Washitani I. (2000) Whole plant carbon gain of an endangered herbaceous species Aster kantoensis and shading influences by an alien grass Eragrostis culvula in the gravelly floodplain habitat. Annals of Botany 86:787-797 Abstract

  6. Kobayashi T., Muraoka H. and Shimano K. (2000) Photosynthesis and biomass allocation of beech (Fagus crenata) and dwarf-bamboo (Sasa kurilensis) in response to contrasting light regimes in a Japan Sea-type beech forest. Journal of Forest Research 5:103-107

  7. Muraoka H., Hirota H., Matsumoto J., Nishimura S., Tang Y., Koizumi H. and Washitani I. (2001) On the convertibility of different light availability indices, relative illuminance and relative photon flux density. Functional Ecology 15: 798-803 Abstract

  8. Uchida M., Muraoka H., Nakatsubo T., Bekku Y., Ueno T., Kanda H. and Koizumi H. (2002) Net photosynthesis, respiration and production of the moss Sanionia uncinata on a glacier foreland in the High Arctic, Ny-Alesund, Svalbard. Arctic, Antarctic, and Alpine Research 34:287-292

  9. Muraoka H., Tang Y., Koizumi H. and Washitani I. (2002) Effects of light and soil water availability on leaf photosynthesis and growth of Arisaema heterophyllum, a riparian forest understory plant. Journal of Plant Research 115:419-427

  10. Muraoka H., Uchida M., Mishio M., Nakatsubo T., Kanda H. and Koizumi H. (2002) Leaf photosynthetic characteristics and net primay production of the polar willow (Salix polaris) in a high arctic polar semi-desert, Ny-Alesund, Svalbard. Canadian Journal of Botany 80:1193-1202

  11. Muraoka H., Koizumi H. and R.W. Pearcy (2003) Leaf display and photosynthesis of tree seedlings in a cool-temperate deciduous broadleaf forest understory. Oecologia 135: 500-509

  12. Noda H., Muraoka H. and Washitani I. (2004) Morphological and physiological acclimation responses to contrasting light and water regimes in Primula sieboldii, an endangered clonal herb in Japan. Ecological Research 19:331-340

  13. Kobayashi T., Shimano K. and Muraoka H. (2004) Effect of light availability on the carbon gain of beech (Fagus crenata) seedlings with reference to the density of dwarf bamboo (Sasa kurilensis) in an understory of Japan Sea-type beech forest. Plant Species Biology 19:33-46

  14. Nakatsubo T., Bekku Y.S., Uchida M., Muraoka H., Kume A., Ohtsuka T., Masuzawa T., Kanda H. and Koizumi H. (2005) Ecosystem development and carbon cycle on a glacier foreland in the high Arctic, Ny-Alesund, Svalbard. Journal of Plant Research 118:173-179.

  15. Muraoka H. and Koizumi H. (2005) Photosynthetic and structural characteristics of canopy and shrub trees in a cool-temperate deciduous broadleaved forest: implication to the ecosystem carbon gain. Agricultural and Forest Meteorology 134: 39-59

  16. Kondo M., Muraoka H., Uchida M., Yazaki Y. and Koizumi H. (2005) Refixation of respired CO2 by understory vegetation in a cool-temperate deciduous forest in Japan. Agricultural and Forest Meteorology 134: 110-121.

  17. Ito A., Muraoka H., Koizumi H., Saigusa N., Murayama S. and Yamamoto S. (2006) Seasonal variation in leaf properties and ecosystem carbon budget in a cool-temperate deciduous broad-leaved forest: simulation analysis at Takayama site, Japan. Ecological Research 21:137-149

  18. Muraoka H and Koizumi H (2006) Leaf and shoot ecophysiological properties and their role in photosynthetic carbon gain of cool-temperate deciduous forest trees. In: Kawatata H and Awaya Y (eds.) Global climate change and response of carbon cycle in the Equatorial Pacific and Indian Oceans and adjacent landmasses. Elsevier Oceanography series vol. 73, Elsevier, pp.417-443

  19. 三上寛了・西田顕郎・村岡裕由(2006)魚眼デジタルカメラ画像による林冠の開空域の自動識別と葉面積指数の推定。写真測量とリモートセンシング45:13-22

  20. Noda H., Muraoka H., Tang Y. and Washitani I. (2007) Phenological changes in respiration rate and annual carbon balance in a perennial herbaceous plant, Primula sieboldii. Journal of Plant Research 120: 375-383

  21. Muraoka H., Noda H., Uchida M., Ohtsuka T., Koizumi H. and Nakatsubo T. (2008) Photosynthetic characteristics and biomass distribution of the dominant vascular plant species in a high-arctic tundra ecosystem, Ny-Alesund, Svalbard: implications to their role in ecosystem carbon gain. Journal of Plant Research 121:137-145

  22. Shen H., Tang Y., Muraoka H. and Washitani I. (2008) Characteristics of leaf photosynthesis and simulated individual carbon budget in Primula nutans under contrasting light and temperature conditions. Journal of Plant Research 121:191-200

  23. Nasahara K.N., Muraoka H., Nagai S. and Mikami H. (2008) Vertical integration of leaf area index in a Japanese deciduous broad-leaved forest. Agricultural and Forest Meteorology 148: 1136-1146

  24. 玉川一郎・吉野純・加納利生・安田孝志・村岡裕由・児島利治・石原光則・永井信・斎藤琢・李美善・牧雅康・秋山侃・小泉博(2008)生態プロセスとリモートセンシングを結ぶモデルの開発。システム農学 24: 129-136

  25. 永井信・奈佐原(西田)顕郎・石原光則・村岡裕由(2008)衛星観測で得られた植生指数に対する生理生態学的な考察。システム農学 24: 183-190

  26. Uchida M., Kishimoto A., Muraoka H., Nakatsubo T., Kanda H. and Koizumi H. (2010) Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem. Journal of Plant Research 123: 79-85

  27. Nagai S., Nasahara K.N., Muraoka H., Akiyama T.and Tsuchida S. (2010) Field experiments to test the use of the normalized difference vegetation index for phenology detection. Agricultural and Forest Meteorology 150: 152-160

  28. Nagai S., Saigusa N., Muraoka H. and Nasahara K.N. (2010) What makes the satellite-based EVI-GPP relationship unclear in a deciduous broad-leaved forest? Ecological Research 25: 359-365

  29. Muraoka H., Saigusa N., Nasahara K.N., Noda H., Yoshino J., Saitoh T.M., Nagai S., Murayama S. and Koizumi H. (2010) Effects of seasonal and interannual variation in leaf photosynthesis and canopy leaf area index on gross primary production in a cool-temperate deciduous broadleaf forest in Takayama, Japan. Journal of Plant Research 123: 563-576, DOI: 10.1007/s10265-009-0270-4

  30. Dhital D., Muraoka H., Yashiro Y., Shizu Y. and Koizumi H. (2010) Measurement of net ecosystem production and ecosystem respiration in a Zoysia japonica grassland, central Japan, by the chamber method. Ecological Research 25: 483-493

  31. Saitoh T.M., Tamagawa I., Muraoka H., Lee N.M., Yashiro Y. and Koizumi H. (2010) Carbon dioxide exchange in a cool-temperate evergreen coniferous forest over complex topography in Japan during two years with contrasting climates. Journal of Plant Research 123: 373-483
  32. Kume A, Nasahara K.N., Nagai S. and Muraoka H. (2010) The ratio of transmitted near-infrared radiation to photosynthetically active radiation (PAR) increases in proportion to the adsorbed PAR in the canopy, Journal of Plant Research, DOI 10.1007/s10265-010-0346-1

  33. 斎藤琢・玉川一郎・村岡裕由・小泉博(2010)森林における光合成・呼吸活動に伴う貯熱量。農業気象 66: 289-298

  34. Choi H., Lee WK, Son Y., Kojima T. and Muraoka H. (2010) Vegetation classification using seasonal variation MODIS Data. Korean Journal of Remote Sensing 26: 665-673

  35. Piao S., Ciais P., Lomas M., Beer C., Liu H., Fang J., Friedlingstein P., Huang Y., Muraoka H., Son Y. and Woodward I. (2011) Contribution of climate change and rising CO2 to terrestrial carbon balance in East Asia: A multi-model analysis. Global and Planetary Change 75: 133-142, doi: 10.1016/j.gloplacha.2010.10.014

  36. Saitoh T.M., Tamagawa I., Muraoka H. and Koizumi H. (2011) Energy balance closure over a cool temperate forest in steeply sloping topography during snowfall and snow-free periods, Journal of Agricultural Meteorology, 67(3), 107-116.

  37. Nagai S., Maeda T., Gamo M., Muraoka H., Suzuki R., Nasahara K.N. (2011) Using digital camera images to detect canopy condition of deciduous broad-leaved trees. Plant Ecology & Diversity 4: 79-89

  38. 斎藤琢・玉川一郎・村岡裕由(2011)渦相関法を用いた炭素収支評価におけるCO2貯留変化量の影響。日本森林学会誌 93:105-112.

  39. Nagai S, Saitoh T.M., Suzuki R., Nasahara K.N., Lee W.-K., Son T., and Muraoka H. (2011) The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia. Forest Science and Technology 7:174-183.

  40. Kamakura M., Kosugi Y., Muramatsu K. and Muraoka H. (2011) Simulations and observations of patchy stomatal behavior in leaves of Quercus crispula, a cool-temperate deciduous broad-leaved tree species. Journal of Plant Research, DOI: 10.1007/s10265-011-0460-8

  41. Nagai S., Saitoh T.M., Kobayashi H., Ishihara M., Suzuki R., Motohka T., Nasahara K.N. and Muraoka H. (2012) In situ examination of the relationship between various vegetation indices and canopy phenology in an evergreen coniferous forest, Japan. International Journal of Remote Sensing 33:6202-6214

  42. Saitoh T.M., Nagai S., Yoshino J., Muraoka H., Saigusa N., and TamagawaI. (2012) Functional consequences of differences in canopy phenology for the carbon budgets of two cool-temperate forest types: simulations using the NCAR/LSM model and validation using tower flux and biometric data. Eurasian Journal of Forest Research 15: 19-30

  43. Inoue T., Nagai S., Inoe S., Ozaki M., Sakai S., Muraoka H. and Koizumi H. (2012) Seasonal variability of soil respiration in multiple ecosystems under the same physical-geographical environmental conditions in central Japan. Forest Science and Technology 8: 52-60

  44. Saitoh T.M., Nagai S., Noda H.M., Muraoka H. and Nasahara K.N. (2012) Examination of the extinction coefficient in the Beer-Lambert law for an accurate estimation of the forest canopy leaf area index. Forest Science and Technology 8:67-76

  45. Saitoh T.M., Nagai S., Saigusa N., Kobayashi H., Suzuki R., Nasahara K.N. and Muraoka H. (2012) Assessing the use of camera-based indices for characterizing canopy phenology in relation to gross primary production in a deciduous broad-leaved and an evergreen coniferous forest in Japan. Ecological Informatics doi:10.1016/j.ecoinf2012.05.001.

  46. Thanyapraneedkul J., Muramatsu K., Daigo M., Furumi S., Soyama N., Nasahara K.N., Muraoka H., Noda H.M., Nagai S., Maeda T., Mano M. and Mizoguchi Y. (2012) A vegetation index to estimate terestrial gross primary production capacity for the Global Change Observation Mission-Climate (GCOM-C)/second-generation global imager (SGLI) satellite sensor. Remote Sensing 4: 3689-3720

  47. Potithep S., Nagai S., Nasahara K.N., Muraoka H. and Suzuki R. (2012) Two separate peiods of the LAI-VIs relationships using in situ measurements in a deciduous broadleaf forest. Agricultural and Forest Meteorology 169: 148-155

  48. Muraoka H., Noda H.M., Nagai S., Motohka T., Saitoh T.M., Nasahara K.N. and Saigusa N. (2012) Spectral vegetation indices as the indicator of canopy photosynthetic productivity in a deciduous broadleaf forest. Journal of Plant Ecology doi: 10.1093/jpe/rts037

  49. Saitoh T.M., Tamagawa I., Muraoka H., Kondo H. (2012) An analysis of summer evapotranspiration based on multi-year observations including extreme climatic conditions over a cool-temperate evergreen coniferous forest, Takayama, Japan. Hydrological Processes DOI: 10.1002/hyp.9834

  50. Piao S.L., A. Ito, S.G. Li, Y Huan, P. Ciai, X.H. Wan, S.S. Peng, H.J. Nan, C. Zhao, A. Ahlstrom, R.J. Andres, F. Chevallier, J.Y. Fang, J. Hartmann, C. Huntingford, S. Jeong, S. Levis, P. E. Levy, J.S. Li, M.R. Lomas, J.F. Mao, E. Mayorga, A. Mohammat, H. Muraoka, C.H. Peng, P. Peylin, B. Poulter, Z.H. Shen, X. Shi, S. Sitch, S. Tao, H.Q. Tian, X.P. Wu, M. Xu, G.R. Yu, N. Viovy, S. Zaehle, N. Zeng, and B. Zhu (2012) The carbon budget of terrestrial ecosystems in East Asia over the last two decades. Biogeosciences 9: 3571-358 doi:10.5194/bg-9-3571-201

  51. Nagai S., Nakai T., Saitoh T.M., Busey R.C., Kobayashi H., Suzuki R., Muraoka H., Kim Y. (2013) Seasonal changes in camera-based indices from an open canopy black spruce forest in Alaska, and comparison with indices from a closed canopy evergreen coniferous forest in Japan. Polar Science 7: 125-135

  52. Noh NJ, Kim C., Bae SW, Lee W-K, Yoon TK, Muraoka H. and Son Y. (2013) Carbon and nitrogen dynamics in a Pinus densiflora forest with low and high stand densities. Journal of Plant Ecology (in press)

  53. Noda H.M., Motohka T., Murakami K., Muraoka H. and Nasahar K.N. (2013) Accurate measurement of optical properties of narrow leaves and conifer needles with a typical integrating sphere and spectroradiometer. Plant, Cell and Environment doi: 10.1111/pce.12100

  54. Chung H., Muraoka H., Nakamura M., Han S, Muller O. and Son Y. (2013) Experimental warming studies on tree species and forest ecosystems: A literature review. Journal of Plant Research 1246: 447-460

  55. Nagai S., Saitoh T.M., Noh NJ., Yoon TK., Kobayashi H., Suzuki R., Nasahara K.N., Son Y. and Muraoka H. (2013) Utility of information in photographs taken upwards from the floor of closed-canopy deciduous broadleaved and closed-canopy evergreen coniferous forests for continuous observation of canopy phenology. Ecological Informatics, http://dx.doi.org/10.1016/j.ecoinf.2013.05.005

  56. Nagai S., Saitoh T.M., Kurumado K., Tamagawa I., Kobayashi H., Inoue T., Suzuki R., Gamo M., Muraoka H. and Nasahara K.N. (2013) Detection of bio-meteorological year-to-year variation by using digital canopy surface images of a deciduous broad-leaved forest. SOLA 9: 106-110, doi:10.2151/sola.2013-024

  57. Kuribayashi M., Noh NJ., Saitoh, T.M., Tamagawa I., Wakazuki Y. and Muraoka H. (2013) Comparison of snow water equivalent estimated in central japan by high-resolution simulations using different land-surface models. SOLA 9: 148-152

  58. Noda H.M., Motohka T., Murakami K., Muraoka H. and Nasahara K.N. (2013) Reflectance and transmittance spectra of leaves and shoots of 22 vascular plant species and reflectance spectra of trunks and branches of 12 tree species in Japan. Ecological Research, DOI 10.1007/s11284-013-1096-z

  59. Fang JY., Guo Z., Hu H., Kato T., Muraoka H. and Son Y. (2014) Forest biomass carbon sinks in East Asia, with special reference to the relative contributions of forset expansion and forest growth. Global Change Biology, doi:10.1111/gcb.12512

  60. Nagai S., Inoue T., Ohtsuka T., Kobayashi H., Kurumado K., Muraoka H. and Nasahara K.N. (2014) Relationship between spatio-temporal characteristics of leaf-fall phenology and seasonal variations in near surface- and satellite-observed vegetation indices in a cool-temperate deciduous broad-leaved forest in Japan. International Journal of Remote Sensing, http://dx.doi.org/10.1080/01431161.2014.907937

  61. Inoue T., Nagai S., Saitoh T.M., Muraoka H., Nasahara K.N. and Koizumi H. (2014) Detection of the different characteristics of year-to-year variation in foliage phenology among deciduous broad-leaved tree species by using daily continuous canopy surface images. Ecological Informatics 22: 58-68

  62. Nagai S., Yoshitake S., Inoue T., Suzuki R., Muraoka H., Nasahara K.N. and Saitoh T.M. (2014) Year-to-year blooming phenology observation using time-lapse digital camera images. Journal of Agricultural Meteorology 70: 163-170

  63. Muraoka H., Saitoh T.M. and Nagai S. (2015) Long-term and interdisciplinary research on forest ecosystem functions: challenges at Takayama site since 1993. Ecological Research 30: 197-200, DOI 10.1007/s11284-015-1251-9

  64. Noda H.M., Muraoka H., Nasahara K.N., Saigusa N., Murayama S. and Koizumi H. (2014) Phenology of leaf morphological, photosynthetic, and nitrogen use characteristics of canopy trees in a cool-temperate deciduous broadleaf forest at Takayama, central Japan. Ecological Research 30: 247-266, DOI 10.1007/s11284-014-1222-6

  65. Saitoh T.M., Nagai S., Yoshino J., Kondo H., Tamagwa I. and Muraoka H. (2014) Effects of canopy phenology on deciduous overstory and evergreen understory carbon budgets in a cool-temperate forest ecosystem under ongoing climate change. Ecological Research 30: 267-277, DOI 10.1007/s11284-014-1229-z

  66. 斎藤琢・永井信・村岡裕由(2014)陸域生態系の炭素収支の現状診断と将来予測 −リモートセンシングの利用ー。日本生態学会誌 64:243-252

  67. Noh NJ., Kuribayashi M., Saitoh T.M., Nakaji T., Nakamura T., Hiura T. and Muraoka H. (2016) Responses of soil, heterotrophic, and autotrophic respiration to experiemntal open-field soil warming in a cool-temperate decidusou forest. Ecosystems 19:504-520, DOI: 10.1007/210021-015-9948-8

  68. Uchida M., Muraoka H. and Nakatsubo T. (2016) Sensitivity analysis of ecosystem CO2 exchange to climate changes in High Arctic tundra using an ecological process-based model. Polar Biology 39: 251-265

  69. Noh NJ., Lee SJ., Jo W., Han S., Yoon TK., Chung H., Muraoka H. and Son Y. (2016) Effects of experimental warming on soil respiration and biomass in Quercus variabilis Blume and Pinus densiflora Sieb. et Zucc. seedlings. Annals of Forest Science DOI 10.1007/s13595-016-0547-4

  70. Tang J., Korner C., Muraoka H., Piao S., Shen M., Thackeray S and Yang X. (2016) Emerging opportunities and challenges in phenology : A review. Ecosphere 7, e01436. 10.1002/ecs2.1436

  71. Xue W., Lindner S., Nay-Htoon B., Dubbert M., Otieno D., Ko J., Muraoka H., Werner C., Tenhunen J. and Harley P. (2016) Nutritional and developmental influences on components of rice crop light use efficiency. Agricultural and Forest Meteorology 223: 1-16

  72. Xue W., Lindner S., Dubbert M., Otieno D., Ko J., Muraoka H., Werner C. and Tenhunen J. (2016) Supplement understanding of the relative importance of biophysical factors in determination of photosynthetic capacity and photosynthetic productivity in rice ecosystems. Agricultural and Forest Meteorology 233: 1-16

Reviews, others
  1. 村岡裕由・鷲谷いづみ(1999)保全生態学のための光環境測定・評価法と光環境からみたマイヅルテンナンショウの生育適地の評価。保全生態学研究 4: 33-55

  2. Pearcy R.W., Muraoka H. and Valladares F. (2005) Crown architecture in sun and shade environments: assessing function and tradeoffs with a 3-D simulation model. New Phytologist 166:791-800

  3. 村岡裕由・内田雅己(2005)生態系純一次生産および生態系純生産の生理生態学的測定−北極ツンドラ生態系を例として−。日本生態学会誌 55:151-160

  4. 村岡裕由・野田響・廣田湖美・小泉博(2007)光の獲得と利用の生理生態学−個体から生態系まで−。日本生態学会誌 57:345-355

  5. Muraoka H. and Koizumi H. (2009) "Satellite Ecology" for linking ecology, remote sensing and micrometeorology from plot to regional scales for ecosystem structure and function study. Journal of Plant Research 122:3-20

  6. Muraoka H., Ishii R., Nagai S., Suzuki R., Motohka T., Noda H., Hirota M., Nasahara K.N., Oguma H. and Muramatsu K. (2012) Linking remote sensing and in situ ecosystem/biodiversity observations by "Satellite Ecology". In: Shin-ichi Nakano et al. (eds.), The biodiversity observation network in the Asia-Pacific region: toward further development of monitoring, Ecological Research Monographs, Springer Japan. DOI 10.1007/978-4-431-54032-8_21

  7. 村岡裕由・野田響・斎藤琢・永井信・奈佐原顕郎(2012)森林生態系の光合成:生理生態学と衛星観測の融合による長期・広域評価。日本植物学会オンライン和文総説集「植物科学の最前線」

  8. Ohtsuka T., Muraoka H., Saigusa N., Iimura Y. and Koizumi H. (2016) Biometric-based estimations of net primary production (NPP) in forest ecosystems. In: Kouki Hikosaka, Ulo. Niinemets, Niels.P.R. Anten (eds.) Canopy photosynthesis: from basics to applications, DOI 10.1007/978-94-017-7291-4_12, Springer.