Transpiration characteristics of forests in Cambodia under fluctuating environmental conditions

• Project/Area Number: 25850108
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Kyushu University
• Principal Investigator: MIYAZAWA Yoshiyuki 九州大学, 学内共同利用施設等, 研究員 (80467943)
• Co-Investigator(Renkei-kenkyūsha): KUMAGAI Tomoomi 名古屋大学, 地球水循環研究センター ; KOBAYASHI Nakako 名古屋大学, 地球水循環研究センター ; TATEISHI Makiko 九州大学, 演習林 ; IWANAGA Fumiko 九州大学, 農学研究院 ; MIZOUE Nobuya 九州大学, 農学研究院
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: Transpiration / photosynthesis / non-native species / native species / Asian monsoon / drought / flooding / 蒸散 / 外来種 / 在来種 / モンスーンアジア / 光合成 / モデル解析 / モンスーン / 森林 / 生理生態

Outline of Final Research Achievements

I conducted the measurements of leaf-level ecophysiological traits, which influence the carbon and water cycle of the ecosystem, in Indochina Peninsula. Periodical monitoring and inverse modelling of leaf-level traits using the weather and continuously obtained sap flux data suggested the species-specific seasonality in transpiration rates in responses to the flooding and drought. Among the leaf traits, photosynthetic capacity did not show clear seasonality, suggesting that plastic ecophysiological traits, leaf water use efficiency, changed the transpiration rates under environmental changes in this region. Knowledge obtained in this study will be useful for the precise prediction of carbon and water exchange between the atmosphere and the vegetation. Without knowledge obtained in situ, ecophysioloigcal traits obtained in nearby but different environments will provided biased modeled carbon and water exchange.

Research Products

• [Journal Article] Implications of leaf-scale physiology for the tree transpiration characteristics under seasonal flooding and drought in central Cambodia (2014)
  • Author(s): 2.Miyazawa Y, Tateishi M, Komatsu H, Iwanaga F, Mizoue N, Ma V, Sokh H, Kumagai T
  • Journal Title: Agricultural and Forest Meteorology Volume: 198-199 Pages: 221-231
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Comparison of the growth traits of a commercial pioneer tree species, paper mulberry (Broussonetia papyrifera L. Vent.), with those of shade-tolerant tree species: investigation of the ecophysiological mechanisms underlying shade-intolerance (2014)
  • Author(s): Miyazawa Y, Manythong C, Fukuda S, Ogata K
  • Journal Title: Agroforestry Systems Volume: 88 Pages: 907-919
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Tropical tree water use under seasonal waterlogging and drought in central Cambodia (2014)
  • Author(s): 5.Miyazawa Y, Tateishi M, Komatsu H, Ma V, Kajisa T, Sokh H, Mizoue N, Kumagai T
  • Journal Title: Journal of Hydrology Volume: 515 Pages: 81-89
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Leaf and soil-plant hydraulic processes in the transpiration of tropical forest (2013)
  • Author(s): Miyazawa, Y. Kobayashi, N. Mudd, R. G. Tateishi, M. Lim, T. Mizoue, N. Giambelluca, T. W. Kumagai, T.
  • Journal Title: Procedia Environmental Sciences:FOUR DECADES OF PROGRESS IN MONITORING AND MODELING OF PROCESSES IN THE SOIL-PLANT-ATMOSPHERE SYSTEM: APPLICATIONS AND CHALLENGES Book Series Volume: 19 Pages: 77-85