| Project/Area Number |
25340012
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kagoshima University |
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Principal Investigator |
Terada Ryuta 鹿児島大学, 農水産獣医学域水産学系, 准教授 (70336329)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIHARA GREGORY N. 長崎大学, 大学院水産・環境科学総合研究科附属環東シナ海環境資源研究センター, 准教授 (40508321)
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| Co-Investigator(Renkei-kenkyūsha) |
SHIMADA SATOSHI お茶の水女子大学, 基幹研究院, 准教授 (40322854)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 海藻 / 藻場 / パルス変調クロロフィル蛍光測定 / 光合成 / 温暖化 / 沿岸生態系 / 藻類 / 温度耐性 / 海草 / 生物多様性 |
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| Outline of Final Research Achievements |
This study was focused on elucidating the effects of environmental stress on the photosynthetic efficiency of various macroalgae that grow in the marginal area, through in-situ and laboratory measurements. Similar to oxygenic photosynthesis, the effective quantum yield of Photosystem II was temperature-dependent, wherein it quickly decreased at critical temperatures; thereby suggesting that this parameter can be a good indicator of thermal stress in the natural environment. The effective quantum yield was also negatively correlated to irradiance; however, it has recovered after overnight dark acclimatization. The combined effects of low temperature and high irradiance caused a decline on algal’s effective quantum yield, which may possibly lead to photosynthetic damage. Hence, algae of the northern distributional limit are more likely to undergo such case during winter season under fine clear sky.
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