toshinori okuda

Last Updated :2017/09/01

Affiliations, Positions
Graduate School of Integrated Arts and Sciences, ., Professor
E-mail
okudat-empathiroshima-u.ac.jp
Self-introduction
I have been working on tropical forest ecology since 1990.

Basic Information

Major Professional Backgrounds

  • 2001/04/01, 2006/03/31, National Institute for Environmental Studies (NIES), Department of Ecosystem Conservation in Tropics, General Manager
  • 2006/04/01, Hiroshima University, Graduate School of Integrated Arts and Sciences, Professor
  • 1994/03/26, 1995/09/30, Forest Resarch Insitute Malaysia
  • 1995/10/01, 2001/03/31, Natinonal Institute for Environmental Studeis, Dept. Deforestation & Desertificaiton, General Manager
  • 1989/04/01, 1995/09/30, National Institute for Environmental Studies, Researcher/Chief Researcher

Educational Backgrounds

  • Hiroshima University, Graduate School, Division of Natural Science, Botany, Japan, 1981/04, 1984/03
  • Hiroshima University, Graduate School, Division of Natural Science, Botany, Japan, 1979/04, 1981/03
  • Hiroshima University, Faculty of Science, Dept of Biology (Botany), Japan, 1975/04, 1979/03
  • Graduate School, Colorado State University, Plant Ecology, U.S.A., 1983

Academic Degrees

  • Doctor of Science, Hiroshima University
  • Master of Science (Botany and Plant Pathology), Colorado State University
  • Master of Science, Hiroshima University
  • Bachelor, Hiroshima University

Educational Activity

  • School of Integrated Arts and Sciences:Department of Integrated Arts and Sciences, Graduate School of Integrated Arts and Sciences:Integrated Arts and Sciences, Graduate School of Integrated Arts and Sciences:Integrated Arts and Sciences

In Charge of Primary Major Programs

  • Integrated Arts and Sciences

Research Fields

  • Biology;Basic biology;Ecology / Environment

Research Keywords

  • Forest Management Forest Ecology Tropical Ecosystems
  • Biodiveristy|tropical forest
  • Biodiversity
  • local participation
  • Ecosystem Services
  • value of forest
  • CO2 emission Carbon stock
  • ecosystem degradation
  • Tropical Forest

Affiliated Academic Societies

  • Ecological Society of America, 1982
  • Japan Society of Tropical Ecology, 1991
  • Ecological Society of Japan, 1980
  • Association of Tropical Biology and Conservation, 1990

Educational Activity

Course in Charge

  1. 2017, Liberal Arts Education Program1, 3Term, Ecology
  2. 2017, Liberal Arts Education Program1, First Semester, Experimental Methods and Laboratory Work in Biology
  3. 2017, Undergraduate Education, Intensive, Field Work In Natural Environment
  4. 2017, Undergraduate Education, 1Term, Biodiversity and Ecology
  5. 2017, Undergraduate Education, Second Semester, Laboratory Course in Natural Environmental Sciences A
  6. 2017, Undergraduate Education, Second Semester, Practical Methods in Natural Environmental SciencesA
  7. 2017, Undergraduate Education, First Semester, Fundamental Laboratory Work in Biology
  8. 2017, Undergraduate Education, First Semester, Fundamental Methodology in Biology
  9. 2017, Undergraduate Education, First Semester, Laboratory Course in Natural Environmental Sciences B
  10. 2017, Undergraduate Education, First Semester, Practical Methods in Natural Environmental SciencesB
  11. 2017, Undergraduate Education, First Semester, Laboratory Course in Natural Environmental Sciences C
  12. 2017, Undergraduate Education, First Semester, Practical Methods in Natural Environmental SciencesC
  13. 2017, Graduate Education (Master's Program) , First Semester, Seminar in Integrated Arts and Sciences
  14. 2017, Graduate Education (Master's Program) , Second Semester, Seminar in Integrated Arts and Sciences
  15. 2017, Graduate Education (Master's Program) , 1Term, Biodiversity Science(Basic studies for Environmental Sciences)

Research Activities

Academic Papers

  1. Methyl chloride and isoprene emissions from tropical rain forest in Southeast Asia, GEOPHYSICAL RESEARCH LETTERS, 35(19), OCT 7 2008
  2. Species associations among dipterocarp species co-occurring in a Malaysian tropical rain forest, JOURNAL OF TROPICAL ECOLOGY, 28, 281-289, MAY 2012
  3. Fruiting behavior of dipterocarps in two consecutive episodes of general flowering in a Malaysian lowland rain forest, JOURNAL OF FOREST RESEARCH, 17(4), 378-387, AUG 2012
  4. Coexistence of two congeneric tree species of Lauraceae in a secondary warm-temperate forest on Miyajima Island, south-western Japan, PLANT SPECIES BIOLOGY, 28(1), 41-50, JAN 2013
  5. Soil-related variations in the population dynamics of six dipterocarp tree species with strong habitat preferences, OECOLOGIA, 172(3), 713-724, JUL 2013
  6. Bidirectional exchange of methyl halides between tropical plants and the atmosphere, GEOPHYSICAL RESEARCH LETTERS, 40(19), 5300-5304, OCT 16 2013
  7. Differences in soil respiration between different tropical ecosystems, Applied Soil Ecology, 34:, 258-265, 2006
  8. Material of dipterocarp - associated gall- inhabiting coccooids collected in Negeri Sembilan, Malaya, Insecta Matsumurana= New Series, 62, 123-151, 20050401
  9. Characteristics of spatial distribution of throughfall in a lowland tropical rainforests, Peninsular Malaysia, Forest Ecology and Management, 224, 19-25, 20060401
  10. Mating system and inbreeding depression in the early regeneration stage of Neobalanocarpus heimii (Dipterocarpaceae), Journal of Plant Research, 118, 423-430, 20050401
  11. Fallen fruits and terrestrial vertebrate frugivores: a case study in a lowland tropical rain forest in Peninsular Malaysia.In Forget, P. M., Lambert, J., E., Hulme, P. E. and Vander Wall, S. B. (eds.) Seed Fate: Predation, Dispersaland Seedling Establishment, CABI Publishing., 151-174, 20050401
  12. Within-crown variation in the timings of leaf emergence and fall of Malaysian trees in association with crown development patterns, American Journal of Botany, 92, 1210-1214, 20050401
  13. Required sample size for estimating soil respiration rates in large areas of two tropical forests and two types of plantations, Malaysia, Forest Ecol. and Management, 210, 455-159, 20050401
  14. Camera trapping: a non-invasive approach as a additional tool in the study of mammals in Pasoh Forest Reserve and adjacent fragmented areas in Peninsular Malaysia. 57: 29-45., Malayan Nature Journal, 57, 29-45, 20050401
  15. Estimation of Tree Above-ground Biomass in a Lowland Dipterocarp Rainforest, by 3-D Photogrammetric Analysis, Forest Ecol and Management, 203, 63-75, 20040401
  16. Temporal and spatial variation of forest biomass in relation to stand dynamics in a mature, lowland tropical rainforest, Pasoh Forest Reserve, Malaysia, Ecological Reseearch, 19(3), 357-363, 20040401
  17. Delayed greening, leaf expansion, and damage to sympatric Shorea species in a lowland rain forest, Journal of Plant Research, 117, 19-25, 20040401
  18. Estimation of above ground biomass of lowland primary tropical forest from remote sensing data. Malaysian, J. Remote Sensing., 3, 83-89, 20030401
  19. Temporal and spatial patterns of mass flowering on the Malay Peninsula, American J. Botany, 90(7), 1025-1031, 20030401
  20. Measurement of CO2 flux above a tropical rain forest at Pasoh in Peninsular Malaysia., Agric. Forest Meteorology, 114, 235-244, 20030401
  21. Sun fleck contribution to leaf carbon gain in Shorea macrophylla grown in a gap and the understory of a tropical secondary forest.In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 251-260, 20030401
  22. Leaf herbivory and defenses of dipterocarp seedlings in Pasoh Forest Reserve. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 495-505, 20030401
  23. The community structure of herbivorous insects on tropical seedlings. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 413-420., 20030401
  24. Logging History and Its Impact on Forest Structure and Species Composition in the Pasoh Forest Reserve-Implication for the Sustainable Management of Natural Resources and Landscapes- In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 15-34, 20030401
  25. Canopy gap dynamics of two different forest stands in a Malaysian lowland rain forest, J. Tropical Forest Science., 18, 109-116, 20060401
  26. Leaf phenology of a small stand of Pasoh Forest Reserve. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 111-121, 20030401
  27. Long-term outlook for research on sustainable management of tropical forests. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia,, Springer= Tokyo=, 569-584, 20030401
  28. Soil and belowground characteristics of Pasoh Forest Reserve. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia,, Springer= Tokyo=, 89-109, 20030401
  29. Small mammal communities at Pasoh. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 533-546, 20030401
  30. Microhabitat preferences of two sympatric Scaphium species in a 50-ha plot in the Pasoh Forest Reserve (Malaysia) In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 137-148, 20030401
  31. History in ecological studies in Pasoh Forest Reserve. In Okuda T, Niiyama K., Thomas, S. C. and Ashton, P.S. (eds.). Pasoh: Ecology of a Rainforest in South East Asia, Springer= Tokyo=, 1-13, 20030401
  32. Effect of Selective Logging on Canopy and Stand Structure in a Lowland Dipterocarp Forest in Peninsular Malaysia,, Forest Ecology and Management, 175, 297-320, 20030401
  33. Is elevation of CO2 concentration beneficial to seedling photosynthesis in the understory of tropical rain forests?, Tree Physiology, 21, 1047-1055, 20010401
  34. Estimation of gene flow in the tropical rain forest tree: Neobalanocarpus heimii (Dipterocarpaceae) inferred from paternity analysis., Molecular Ecology, 9, 1843-1852., 20000401
  35. Leaf developmental process and crown structure of a tropical pioneer tree, Macaranga gigantia in Peninsular Malaysia., Oecologia, 125, 476-482, 20000401
  36. Leaf damage and traits of dipterocarp seedlings in a lowland rain forest in peninsular Malaysia., Tropics, 9, 237-243., 20000401
  37. Chemical defense of seeds and fruiting frequency of dipterocarps., J. Tropical Ecology, 15, 695-700, 19990401
  38. Mechanism of mass flowering in Dipterocarpaceae., J. Tropical Ecology, 15, 437-449, 19990401
  39. Tree distribution pattern and fate of juveniles in a lowland tropical rain forest - implications for regeneration and maintenance of species diversity, Plant Ecology, 131, 155-171, 19970401
  40. The effect of elevated CO2 on the growth of two different climate origin forbs in four levels of nitrogen nutrition., Pertanika J. Science Technology, 3(2), 297-310., 19950401
  41. Effect of herbivory on seedling establishment of Dryobalanops aromatica (Dipterocarpaceae) in a plantation forest in Peninsular Malaysia., J. Tropical Forest Science., 8, 59-70, 19950401
  42. Interactive effects of CO2 and nitrogen resources on shoot development of Chenopodium alba and Amaranthus patulus., Weed Research= Japan, 39, 213-221, 19940401
  43. Spatial Pattern of adult trees and seedling survivorship of Pentaspadon motleyi Hook, f. in a lowland rain forest in Peninsular Malaysia., J. Tropical Forest Science., 7, 475-489, 19950401
  44. Seedling establishment of canopy tree species in Malaysian tropical rain forest, Plant Species Boil, 8, 167-174, 19930401
  45. Germination requirements in Carex kobomugi (Sea isle)., J. Plant Research, 106, 245-248, 19930401
  46. Application of Landsat data to vegetation classification. In Sakata, T., Nakane, K. (eds.). Application of remote sensing for resources monitoring and vegetation mapping pp., Research Information Center=Tokai University= Tokyo., 115-123, 19900401
  47. Effects of deer browsing on the early stage of pyrogenic succession on Miyajima Island, Southwestern Japan., Ecol. Research, 5, 353-366., 19900401
  48. The distribution of C3 and C4 graminoids in the semi-natural grassland of southwestern Japan., J. Japan. Grassl. Sci., 35, 175-184, 19870401
  49. Effects of herbivores on the competition of C3 and C4 graminoids., J. Sci. Hiroshima Univ., 20, 1-27, 19860401
  50. Spatial pattern of saplings and adult trees of canopy- and sub-canopy-forming species in a lowland rain forest in Peninsular Malaysia. In M. Yasuno and M. M Watanabe (eds.) Biodiversity - Its Complexity and Role, Global Environmental Forum= Tokyo, 99-110, 19940401
  51. Floristic diversity of C3 and C4 graminoids in relation to the grazing/landscape level in short-grass steppe, HIKOBIA, 11, 553-560, 19940401
  52. Effects of shading on dominance and diversity of C3 and C4 graminoids., HIKOBIA, 11(4), 561-573, 19940401
  53. The phenotypic variation of Glochidion obovatum Sieb. et Zucc. in relation to the deer browsing., HIKOBIA, 10, 13-19, 19870401
  54. Food habits of sika deer (Cervus nippon) and their ecological influence on the vegetation of Miyajima Island, HIKOBIA, 9, 93-102, 19840401
  55. Analyzing the spatial structure of a Sri Lankan tree species with multiple scales of clustering, Ecology, 88(12), 3088-3102, 20071219
  56. Emission of nitrous oxide from tropical forest and plantation soils in Peninsular Malaysia, Tropics, 17, 17-23, 20070401
  57. Density-dependent selfing and its effects on seed performance in a tropical canopy tree species, Shorea acuminata (Dipterocarpaceae), Forest Ecol. and Management, 256, 375–383, 20080401
  58. Size-related flowering and fecundity in a tropical canopy tree species, Shorea acuminata (Dipterocarpaceae) during two consecutive general flowerings, Journal of Plant Research, 121, 33-42, 20080401
  59. The effects of logging practices on soil green house gases (CO2, CH4, N2O) flux in tropical humid forest, Peninsular Malaysia, Agricultural and Forest Meteorology, 148, 799-806, 20080401
  60. Growth strategies differentiate the spatial patterns of 11 dipterocarp species coexisting in a Malaysian tropical rain forest, Journal of Plant Research, 122, 81-93, 20090401
  61. A preliminary survey of insect galls on dipterocarps in a lowland rainforest at Pasoh, Peninsular Malaysia, Tropics, 18, 93-102, 20090401
  62. Spatial and temporal variation in soil respiration in a seasonally dry tropical forest, J. Tropical Ecology, 25, 531–539, 20090401
  63. Paternity analysis-based inference of pollen dispersal patterns, male fecundity variation, and influence of flowering tree density and general flowering magnitude in two dipterocarp species, Annals of Botany, 104, 1421 – 1434, 20091001
  64. Risk assessment mapping of landscape development based on ecological service and goods in Malaysia Lowland Tropical Rainforest, J Environmental Science and Engineering, 4(2), 58-69, 20100201
  65. Habitat Association of Trees in a 50-ha Malaysian Rain Forest Plot, tropics, 19, 1-8, 20100401
  66. Interlinkage between the biodiversity and climate changes - Towards good use of Pasoh Assets, Celebrating 25 Years of Tropical Forest Research' Proceedings, 20110801
  67. Development of a forest corridor through an oil palm plantation as a long-term plan for ecosystem remediation and adaptive land use management in the tropics. Proceedings on Rehabilitation of Tropical Rainforest Ecosystem, UPM proceedings, 189-196, 20111001
  68. The effects of logging on soil greenhouse gas (CO2,CH4, N2O) flux in a tropical rain forest, Peninsular Malaysia, AGRICULTURAL AND FOREST METEOROLOGY, 148(5), 799-806, MAY 15 2008
  69. Spatial and temporal variation in soil respiration in a seasonally dry tropical forest, Thailand, JOURNAL OF TROPICAL ECOLOGY, 25, 531-539, SEP 2009
  70. Paternity analysis-based inference of pollen dispersal patterns, male fecundity variation, and influence of flowering tree density and general flowering magnitude in two dipterocarp species, ANNALS OF BOTANY, 104(7), 1421-1434, DEC 2009
  71. Effects of 50 years of selective logging on demography of trees in a Malaysian lowland forest, FOREST ECOLOGY AND MANAGEMENT, 310, 531-538, DEC 15 2013
  72. Assessment of Riparian Ecosystem on Amphibians along a Green Corridor in Oil Palm Plantation, Pasoh, Negeri Sembilan, Peninsular Malaysia, SAINS MALAYSIANA, 43(5), 655-666, MAY 2014
  73. Effects of logging road networks on the ecological functions of dung beetles in Peninsular Malaysia, FOREST ECOLOGY AND MANAGEMENT, 326, 18-24, AUG 15 2014
  74. Spatial and temporal variations in the light environment in a primary and selectively logged forest long after logging in Peninsular Malaysia, TREES-STRUCTURE AND FUNCTION, 28(5), 1355-1365, OCT 2014
  75. Impacts of Small-scale Clearings due to Selective logging on Dung Beetle Communities, BIOTROPICA, 46(6), 720-731, NOV 2014
  76. Diel flight activity and habitat preference of dung beetles (Coleoptera: Scarabaeidae) in Peninsular Malaysia, RAFFLES BULLETIN OF ZOOLOGY, 62, 795-804, 2014
  77. Radiocesium accumulation in the anuran frog, Rana tagoi tagoi, in forest ecosystems after the Fukushima Nuclear Power Plant accident, ENVIRONMENTAL POLLUTION, 199, 89-94, APR 2015
  78. Selection of Vegetation Indices in Hierarchical Structural Based Vegetation Species Classification, Journal of Teknologi, 71(5), 51-55, 2014
  79. Road network density as a benchmark for biodiversity safeguards in Malaysian production forests, Land, 3, 639-657, 2014
  80. Spatial variation of soil respiration in relation to logging road in an upper tropical hill forest in Peninsular Malaysia, Tropics, 24, 1-9, 2015
  81. Suitability of Interferometric Synthetic Aperture Radar (IFSAR) for biomass estimation in a selectively logged tropical rainforest in Peninsular Malaysia, TROPICS, 24(3), 101-111, 2015
  82. Inter-annual variations of net ecosystem productivity of a primeval tropical forest basing on a biometric method with a long-term data in Pasoh, Peninsular Malaysia, TROPICS, 25(1), 1-12, JUN 1 2016
  83. Spatial variation in the Cs-137 inventory in soils in a mixed deciduous forest in Fukushima, Japan, JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 161, 35-41, SEP 2016
  84. Soil respiration change immediately after logging operations in an upper tropical hill forest, peninsular Malaysia, ., HIKOBIA, 17(1), 3-9, 2015

Publications such as books

  1. 2003/04, Pasoh -Ecology of a Lowland Rain forest in Southeast Asia, Springer-Verlag, 2003, 04, 4431006605, 628

Invited Lecture, Oral Presentation, Poster Presentation

  1. Assessment of criteria and indicators for securing the co-benefits of local community and biodiversity — Towards the improvement on the “safeguard” of REDD plus —, Toshinori Okuda, ASEAN森林会議, 2015, With Invitation, Forest Department Maynmar, Inle Lake, Myanma

External Funds

Acceptance Results of Competitive Funds

  1. Environment Research and Technology Development Fund, 2014/04/01, 2017/03/31

Social Activities

History as Committee Members

  1. external reviewer/ Faculty of Forest / UPM, 2013/08, Universiti Putra Malaysia
  2. External reviewer (UPM/ Faculty of Environmental Science), 2008/04, 2010/03

History as Peer Reviews of Academic Papers

  1. 2014, Malaysian Forester, Editor