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Water temperature, salinity, algal-chlorophyll profiles and radiolarian fauna in the surface and subsurface waters in early June, off Tassha, Sado Island, central Japan
http://hdl.handle.net/10191/2133
http://hdl.handle.net/10191/2133778f0b15-d2ff-469f-8afe-48976ca1cb43
名前 / ファイル | ライセンス | アクション |
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21_31-46.pdf (7.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2017-09-04 | |||||
タイトル | ||||||
タイトル | Water temperature, salinity, algal-chlorophyll profiles and radiolarian fauna in the surface and subsurface waters in early June, off Tassha, Sado Island, central Japan | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Water temperature, salinity, algal-chlorophyll profiles and radiolarian fauna in the surface and subsurface waters in early June, off Tassha, Sado Island, central Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | algal chlorophyll | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Radiolaria | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sado Island | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | salinity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sea of Japan | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | seasonal faunal change | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Tsushima Warm Current | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | water temperature | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
著者 |
Kurihara, Toshiyuki
× Kurihara, Toshiyuki× Shimotani, Toyokazu× Matsuoka, Atsushi |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The profiles of water properties and vertical distribution of radiolarian faunas are documented from the surface to subsurface water shallower than 100m deep in the Sea of Japan, off Tassha, Sado City, Sado Island, Niigata Prefecture, central Japan. The temperature from 64m deep to the surface ranges from ca. 12.0°C to 18.0°C. Based on temperature gradient, the water mass can be subdivided into three layers. The surface layer shallower than 21m has a high temperature gradient (2.0°C/10m). This profile indicates that the water mass is in the intermediate condition between the winter to spring and summer seasons. The faunal compositions for three different depth intervals can be summarized as follows: (1) the fauna collected from ca. 90-63m deep is characterized by the abundant occurrences of Cyrtidosphaera reticulata and plagiacanthid and lophophaenid nassellarians, associated with Tetrapyle octacantha, Didymocyrtis tetrathalamus tetrathalamus, and Larcopyle butschlii,(2) the faunas collected from ca. 63-36m and 36-0m deep are similar to those of the deeper fauna but their compositions are quite different; T. octacantha and D. t. tetrathalamus are relatively abundant instead of C. reticulata. For C. reticulata and L. butschlii, there is a close correlation between lowering temperature in the vertical profile and increasing numbers of individuals. This may be caused by their temperature tolerance ranges. In addition, species preferring warm water such as D. t. tetrathalamus comprise a large percentage of the shallower fauna than the deeper. Taken the temperature profile and faunal data together, we conclude that the faunal transition off Tassha is mediated by the influx of warm water dwellers of the Tsushima Warm Current into the surface layer of the water column during spring to summer. | |||||
書誌情報 |
Science reports of Niigata University. (Geology) en : Science reports of Niigata University. (Geology) 巻 21, p. 31-46, 発行日 2006-03 |
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出版者 | ||||||
出版者 | 新潟大学理学部 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 13491237 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11436808 | |||||
著者版フラグ | ||||||
値 | publisher |