2013 Fiscal Year Final Research Report
Application of tree-ring isotopic analyses to understand carbon and water exchanges in a tropical rainforest
| Project/Area Number |
24658145
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Forest science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
TAKANASHI Satoru 独立行政法人森林総合研究所, 気象環境研究領域, 主任研究員 (90423011)
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| Co-Investigator(Renkei-kenkyūsha) |
KOSUGI Yoshiko 京都大学, 農学研究科, 助教 (90293919)
MATSUO Naoko 三重大学, 生物資源学研究科, 講師 (00423012)
KAGAWA Akira 独)森林総合研究所, 木材特性研究領域, 主任研究員 (40353635)
NAKATSUKA Takeshi 総合地球環境学研究所, 研究部, 教授 (60242880)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 同位体 / 年輪 / 森林 / マレーシア / 環境応答 / 気候変動 / 熱帯雨林 / エルニーニョ |
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| Research Abstract |
We analysed carbon and oxygen isotope patterns of xylem of tree species from tropical climate, where trees do not have obvious tree-rings. Micro-meteorological observation and model analysis revealed that the value of the oxygen isotope of xylem would have two peaks in one year. Fluctuations of the oxygen isotope of xylem was too scattered for absolute dating. Combined analysis of the radioactive carbon isotope of xylem showed that the variations in the oxygen isotope of trees were similar to the pattern of the soil water content. From results of the carbon isotope, water use efficiency of the tree were tend to increase with decrease of the soil water content.
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