2011 Fiscal Year Final Research Report
Contribution of chlorophyll derivatives in ocean organic matter pool-evaluation by comprehensive method
| Project/Area Number |
22651003
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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 |
Environmental dynamic analysis
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| Research Institution | University of Tsukuba |
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Principal Investigator |
HAMA Takeo 筑波大学, 生命環境系, 教授 (30156385)
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| Co-Investigator(Kenkyū-buntansha) |
WADA Shigeki 筑波大学, 生命環境系, 助教 (60512720)
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| Research Collaborator |
SATO Yuhi 筑波大学, 生命環境科学研究科, 博士後期課程
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| Project Period (FY) |
2010 – 2011
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| Keywords | 海洋溶存態有機物 / 有機炭素プール / 植物プランクトン色素 / 色素派生物 |
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| Research Abstract |
The new method to estimate the contribution of chlorophyll derivatives to oceanic organic carbon pool has been developed. In this method, chlorophyll molecule was converted to chlorine by chromic acid oxidation. The study using authentic chloropigments proved the quantitative estimation of derivatives. The decomposition experiments of chlorophyll were conducted using natural phytoplankton populations. Though chloropigments with fluorescence decomposed rapidly, the decomposition rate of chloropigments without fluorescence were low. Observation of in the East China Sea showed that the concentration of chloropigments without fluorescence was 20 times higher than that with fluorescence. However, the contribution of chlorophyll derivatives was about a few% to particulate organic carbon. The study on the dissolved chloropigments is necessary to elucidate the contribution to ocean organic carbon pool.
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