2014 Fiscal Year Final Research Report
Study on dynamics of arsenate in phosphate-depleted marine environments
| Project/Area Number |
24710004
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | ヒ酸塩 / リン酸塩 / 西部北太平洋 / 亜熱帯海域 / 高感度分析 |
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| Outline of Final Research Achievements |
Dynamics of trace arsenate and phosphate in the subtropical Pacific Ocean were investigated using a highly sensitive spectrophotometry. Concentration ratios of arsenate to phosphate were significantly higher in the phosphate-depleted western subtropical North Pacific than the other subtropical regions, suggesting that arsenate influences on the growth of microorganisms in the western subtropical North Pacific. However, arsenate-enrichment incubation experiments in the western subtropical North Pacific revealed that arsenate addition did not induce significant variations in its assimilation, organic matter production, and community structure. This result implies that microorganisms in the phosphate-depleted marine environments have a high tolerance for the arsenate as a toxic substance and their growth is not particularly supported by the arsenate as an alternative of phosphate.
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| Free Research Field |
生物地球化学
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