| Project/Area Number |
24710013
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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 | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
NAKAJIMA Ryota 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, ポストドクトラル研究員 (20546246)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | サンゴ粘液 / 微生物 / 細菌 / 鞭毛虫 / 従属栄養細菌 / 微生物食物連鎖 |
|---|
| Research Abstract |
This study examined the effect of organic matter produced by scleractinian corals (coral mucus) on microbes and microbial food chain in coral reef ecosystems. The abundance of heterotrophic bacteria (hereafter bacteria) significantly increased in the filtered seawater with coral mucus compared to that without mucus. Meanwhile, the concentrations of dissolved organic matter (DOM) and dissolved inorganic phosphate (DIP) decreased significantly in the seawater with mucus. These results suggest that the bacteria consumed DOC and DIP for their growth. This study also showed that a higher concentration of microbes (bacteria and flagellates) was observed in the higher coral coverage site, probably due to the higher organic matter released by corals. Therefore, coral mucus may enhance carbon flow in the microbial food chain (DOM -> bacteria -> flagellates) in reef ecosystems.
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