2015 Fiscal Year Final Research Report
Evaluation of on growth mechanism of cyanobacteria on coral colonies
| Project/Area Number |
25430197
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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 |
Conservation of biological resources
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | サンゴ / 細菌 / 病気 / ホワイトシンドローム / ブラックバンド病 |
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| Outline of Final Research Achievements |
Effect of bacteria and attached diatoms etc. on corals have been studied. In Zamami Is, filamentous cyanobacterium that cause necrosis of sea fan was identified as Moorea bouillonii. Associated shrimp facilitating the formation of cyanobacterial mat was suggested. In addition, the cyanobacterium can bore into coral skeleton with thick terminal end as an anchor in the coral skeleton was observed. Black band disease (BBD, caused by bacterial consortium) was surveyed around Sesoko Is. Of 35 sites studied, 34 sites showed infection. Most susceptible coral was Montipora (especially encrusting type) with mean infection rate of 7%. Outbreak of white syndrome was observed around Ohshima Island in Miyazaki prefecture, infected corals were mostly Acropora. In a blue coral Heliopora, attached diatoms (Licmophora spp.) was observed through a year. These findings show that those tiny organisms are growing threats to recent and future coral reef ecosystem.
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| Free Research Field |
サンゴ礁生物学
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