播磨灘における夏季のリン循環と海況の推移
広島大学生物生産学部紀要 26 巻 1・2 号
79-88 頁
1987-11 発行
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この文献の参照には次のURLをご利用ください : https://doi.org/10.15027/23479
ファイル情報(添付) | |
タイトル ( jpn ) |
播磨灘における夏季のリン循環と海況の推移
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タイトル ( eng ) |
Phosphorus Cycle and Hydrographic Conditions of Harima-Nada in Summer
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作成者 |
遠藤 拓郎
今林 博道
松田 治
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収録物名 |
広島大学生物生産学部紀要
Journal of the Faculty of Applied Biological Science, Hiroshima University
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巻 | 26 |
号 | 1・2 |
開始ページ | 79 |
終了ページ | 88 |
抄録 |
The principal phosphorus cycle and budget in summer of Harima-Nada, which was divided into three sub-waters on the base of hydorographic conditions, were investigated. Phosphorus flux associated with each pathway of the cycle was estimated and schematized (Fig. 5). In the nothern sub-waters, relatively high production of phytoplankton phosphorus was supposed to be caused mainly by phosphorus inflow through rivers, waste water and its release from the sediment. However, the higher phytoplankton production measured in the productive zone of whole region was not able to be maintained only by phosphorus input from land or sediment. Vertical stability of the water column in summer resulted in the serious phosphorus depletion by phytoplankton uptake in the surface water. Therefore, the standing stock of the nutrient was not sufficient in the productive zone, but high turnover rate of phosphorus, approximately one cycle per day as phytoplankton phosphorus, was estimated. Possible pathways of the nutrient supply which enable the high turnover are supposed to be through excretion from phytoplankton cells and by zooplankton. In the bottom water, high concentration of inorganic phosphate was observed where the mineralization of organic phosphorus and/or liberation of phosphate from the sediment prevailed. In those processes, the bioturbation by benthic animals presuinably plays an important role in the nutrient supply especially in the shallow waters.
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NDC分類 |
水産業 [ 660 ]
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言語 |
日本語
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資源タイプ | 紀要論文 |
出版者 |
広島大学生物生産学部
農林水産研究情報センター
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発行日 | 1987-11 |
出版タイプ | Version of Record(出版社版。早期公開を含む) |
アクセス権 | オープンアクセス |
収録物識別子 |
[ISSN] 0387-7647
[NCID] AN00213621
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