| Project/Area Number |
25257401
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
都築 勇人 愛媛大学, 農学研究科, 准教授 (70363257)
甲山 治 京都大学, 東南アジア地域研究研究所, 准教授 (70402089)
伊藤 雅之 京都大学, (連合)農学研究科(研究院), 助教 (70456820)
山田 浩之 北海道大学, (連合)農学研究科(研究院), 講師 (10374620)
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| Co-Investigator(Renkei-kenkyūsha) |
ITOH Akihiko 国立環境研究所, 地球環境研究センター, 主任研究員 (70344273)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥44,850,000 (Direct Cost: ¥34,500,000、Indirect Cost: ¥10,350,000)
Fiscal Year 2016: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2015: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2014: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2013: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
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| Keywords | 熱帯泥炭林 / 環境撹乱 / 排水 / 土地利用変化 / プランテーション / 泥炭分解 / 熱帯泥炭 / 人為撹乱 / オイルパーム園 / ゴム園 / 炭素収支 / メタン / 環境変動 / 炭素循環 / フラックス観測 / 水循環 / 二酸化炭素 / 温室効果 / 温暖化 / 東南アジア / 土壌炭素 |
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| Outline of Final Research Achievements |
In tropical peat ecosystems in Southeast Asia, including an undrained peat swamp forest, a drained swamp forest, a burned ex-swamp forest, a rubber plantation etc., various CO2 or carbon fluxes were measured, and CO2 emissions through oxidative peat decomposition, ecosystem-scale CO2 balance and carbon leaching (dissolved organic carbon: DOC) through runoff were quantified. As a result, 1) the sensitivity of peat decomposition to groundwater level, 2) a large amount of peat decomposition in a peat plantation, and 3) the contribution of peat decomposition to total subsidence, were mainly elucidated. The field data of CO2 fluxes were used to customize a terrestrial ecosystem process model (VISIT) to tropical peat ecosystems. Using the model, the carbon balance of tropical peatlands in whole Borneo Island was evaluated to be 1.8±12.9 Mt C ha-1 yr-1, which suggests that the tropical peat ecosystems have already changed to a carbon source.
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