Investigation of long-term record of meteorological condition and physiological response of deciduous and evergreen tropical forests trees based on the analysis of tree-ring stable isotope ratios

2017 Fiscal Year Final Research Report

• Project/Area Number: 26304004
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Environmental dynamic analysis
• Research Institution: Forest Research and Management Organization (2015-2017); Kyoto University (2014)
• Principal Investigator: Yoshifuji Natsuko 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員等 (80514223)
• Co-Investigator(Kenkyū-buntansha): 松尾 奈緒子 三重大学, 生物資源学研究科, 講師 (00423012) ; 田中 延亮 東京大学, 大学院農学生命科学研究科(農学部), 助教 (10323479) ; 高梨 聡 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員等 (90423011)
• Co-Investigator(Renkei-kenkyūsha): KOSUGI Yoshiko 京都大学, (連合)農学研究科(研究院), 教授 (90293919) ; KAMAKURA Mai 京都大学, 農学研究科, 研究員 (40523840)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 同位体年輪 / 熱帯雨林 / 熱帯季節林 / 生理的応答

Outline of Final Research Achievements

We aimed to investigate how the profiles of tree-ring stable isotope ratios reflect the meteorological conditions and physiological response of trees to meteorological fluctuation in a deciduous tropical seasonal forest and a tropical rainforest. We measured the intra- and inter-annual variations in the stable carbon and oxygen isotope compositions of tree-rings and dated the tree-ring formation. The relationships and the time-lag of the profiles of tree-ring stable isotope ratios with rainfall, soil moisture, and index of physiological response of trees estimated from CO2/H2O exchanges data measured above the canopy were examined.

Free Research Field

森林水文学