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  1. 学位論文
  2. 博士論文
  3. 理工学研究科(理学系)
  1. 部局別インデックス
  2. 理工学研究科

造礁サンゴ骨格内に生息する微生物群に関する基礎研究

http://hdl.handle.net/20.500.12000/18547
http://hdl.handle.net/20.500.12000/18547
39d84e22-102c-4eee-9d65-3fa1c39b9084
名前 / ファイル ライセンス アクション
riken185.pdf riken185.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2021-12-15
タイトル
タイトル 造礁サンゴ骨格内に生息する微生物群に関する基礎研究
言語 ja
作成者 山崎, 征太郎

× 山崎, 征太郎

ja 山崎, 征太郎

Yamazaki, Seitaro

× Yamazaki, Seitaro

en Yamazaki, Seitaro

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 The establishment of obligate symbiotic relationship with photosynthetic dinoflagellate (zooxanthellae) is essential for reef-building corals in adaptation to natural oligotrophic environments. Breakdown of the symbiotic relationship with zooxanthellae leads to coral bleaching that is pronounced under stress conditions. Ecological studies have suggested that susceptibility to bleaching and the ability to recover from bleaching vary among coral species. However, it is yet unconfirmed what endogenous factors make such differences. Here I describe endolithic microbe within coral skeleton as a novel factor that may account for the diversity in response to environmental stimuli. Endolithic microbial communities were investigated in skeleton of the massive coral Goniastrea aspera that is one of the bleaching tolerant species. “Halomicronema sp.”, a moderately halophilic and thermophilic cyanobacterium, was found in the skeleton of G. aspera. Comparative study of the endolithic microbial flora within skeletons of G. aspera showed that bacterial diversity was much higher in the coral skeletons collected from oligotrophic environments than those from eutrophic ones. The endolithic microbial community included sulfate-reducing bacteria and resembled microbial mats commonly found in harsh environments. To explore beneficial effects of endolithic microbes on coral physiology, the branching coral Acropora digitifera with and without endolithic algae were exposed to high irradiance of visible light. The presence of endolithic algae within the skeletons was found to suppress photoinhibition of photosynthesis in the host tissue. The results suggest that endolithic algae have a photoprotective role in the coral photosynthesis. The interactions between reef-building corals and endolithic microbes are discussed in terms of secondary or facultative symbiotic relationship.
内容記述タイプ Other
内容記述 学位論文
出版者
言語 ja
出版者 山崎征太郎
言語
言語 eng
資源タイプ
資源タイプ doctoral thesis
資源タイプ識別子 http://purl.org/coar/resource_type/c_db06
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/18547
識別子タイプ HDL
学位授与番号
学位授与番号 甲第185号
学位名
学位名 博士(理学)
言語 ja
学位授与年月日
学位授与年月日 2010-03-23
学位授与機関
学位授与機関識別子
学位授与機関識別子 18001
学位授与機関識別子Scheme kakenhi
学位授与機関名
学位授与機関名 琉球大学
言語 ja
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