WEKO3
-
RootNode
アイテム
Community Structures of Recent and Pleistocene Hermatypic Corals in the Ryukyu Islands, Japan
http://hdl.handle.net/10097/28856
http://hdl.handle.net/10097/2885665265d68-79c4-42ee-8e1c-f36c415c04aa
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00004213268.pdf (13.1 MB)
|
|
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2008-05-02 | |||||||
| タイトル | ||||||||
| タイトル | Community Structures of Recent and Pleistocene Hermatypic Corals in the Ryukyu Islands, Japan | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | hermatypic coral | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | reef | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Ryukyu Islands | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | community | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | coverage | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | diversity | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | zonation | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Ryukyu Group | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | stratigraphy | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | paleogeography | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 著者 |
Nakamori, Toru
× Nakamori, Toru
|
|||||||
| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Ecological features such as diversity and coverage of the Recent hermatypic corals in Ishigaki-jima and Sesoko-jima in the Ryukyu Islands are measured by a transect method. Communities, growth form and zonation of the corals are discussed on the basis of the measurements. Fifty-one coral genera and 144 species are recorded in this study and 11 hermatypic coral communities are recognized on the basis of the ratio of species. Six topographic areas are discriminated in the coral reefs in these two islands. Each community is distributed in the specific topographic area, but the same community does not necessarily appear in the same topographic area of different reefs. On the other hand, the distributions of the dominant growth forms of corals within a reef are fairly constant not only in the Ryukyu Islands but also in the Indo-Pacific Region. Relationships between the diversity and coverage of the hermatypic corals apparently show the ecological succession and support the intermediate disturbance hypothesis (Connell, 1978). The growth forms of Porites australiensis indicate eco-morphological variations. They are spherical, hemispherical and laminar at depths of 0, 10 and 30 m respectively. The growth rate of the corallum of P. australiensis decreases exponentially with depth. The increasing rate of corallum surface area is constant, having no relation to water depth. A model for corallum eco-morphology of P. australiensis is proposed in relation to light intensity. Stratigraphy of the Ryukyu Group is investigated in Hateruma-jima, Miyako-jima, Okinawa, Okierabu-jima and Kikai-jima. The strata in these islands are correlated with one another on the basis of radiometric ages and nannoplankton biostratigraphy. Ecological studies of fossil hermatypic corals are carried out on five formations of almost the same age; the Takanasaki Formation (Hateruma-jima), Miyako-jima Limestone (Miyako-jima), Naha Formation (Okinawa), Okierabu-jima Formation (Okierabu-jima) and Takigawa Formation (Kikai-jima). The rate of fossil corals to the total rock volume is determined for each taxonomic and morphological group. Fifty-two genera and 70 species are identified. Five fossil communities (Communities A-E) are recognized on the basis of measurments, which can be correlated to the Recent ones. The number of genera decreases and equitability increases with increasing latitude. The rate of fossil corals to the total rock volume also decreases with latitude. Depositional environments of six facies of the Ryukyu Group (coral limestone, rhodolith limestone, detrital limestone, Cycloclypeus-Operculina limestone, calcareous sandstone and conglomerate) are inferred by utilizing paleontological and sedimentological information. Paleogeography of the five islands are reconstructed based on the distributions of the coral communities and the depositional environment of the facies. | |||||||
| 書誌情報 |
The science reports of the Tohoku University. Second series, Geology = 東北大学理科報告. 地質学 巻 56, 号 2, p. 71-A54, 発行日 1986-03-31 |
|||||||
| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0082464X | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA00836349 | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 出版者 | ||||||||
| 出版者 | Tohoku University | |||||||
| 資源タイプ | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 紀要類(bulletin) | |||||||
| 登録日 | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 公開日（投稿完了日） | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 発行日 | ||||||||
| 日付 | 1986-03-31 | |||||||
| 日付タイプ | Created | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 13050455 bytes | |||||||
| 更新日 | ||||||||
| 日付 | 2010-01-27 | |||||||
| 日付タイプ | Created | |||||||
