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Oligotrophication and its measures in the Seto Inland Sea, Japan
https://fra.repo.nii.ac.jp/records/2010954
https://fra.repo.nii.ac.jp/records/20109548e94eeff-086a-43b4-a062-718d8ae9bac1
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
fra_k_49_21.pdf (401.0 KB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||
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| 公開日 | 2024-10-02 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Oligotrophication and its measures in the Seto Inland Sea, Japan | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | fisheries production; nutrient; oligotrophication; Seto Inland Sea | |||||||||||||
| 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 | |||||||||||||
| 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 | |||||||||||||
| 著者 |
阿保, 勝之
× 阿保, 勝之
WEKO
480
× Yamamoto, Tamiji
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | The Seto Inland Sea experienced eutrophication during the period of high economic growth and then subsequent oligotrophication due to reduction of inflow load. The nutrient concentration in the seawater peaked in the beginning of 1970’s, and thereafter, it has been decreasing. Dissolved inorganic nitrogen (DIN) has remarkably decreased in recent years following the decrease in dissolved inorganic phosphorus (DIP). As a result, Nori (Pyropia) production has decreased in recent years due to bleaching of leaves caused by DIN deficiency. Recent slack in fisheries production was also likely influenced by the nutrient depletion as evidenced by the fish catch using a compact trawl. The process of both eutrophication and oligotrophication that occurred in the Seto Inland Sea can be explained by hysteresis. We introduce several countermeasures to the oligotrophication in the Seto Inland Sea. In particular, to improve Nori production, local nutrient supply was experimentally augmented, such as by application of fertilizer, temporary discharge of dam water, sediment plowing, and ad hoc operations of relaxing sewage treatment water. | |||||||||||||
| 言語 | en | |||||||||||||
| bibliographic_information |
ja : 水産研究・教育機構研究報告 en : Bulletin of Japan Fisheries Research and Education Agency 巻 49, p. 21-26, ページ数 6, 発行日 2019-02 |
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| 出版者 | ||||||||||||||
| 出版者 | 水産研究・教育機構 | |||||||||||||
| 言語 | ja | |||||||||||||
| 出版者 | ||||||||||||||
| 出版者 | Japan Fisheries Research and Education Agency | |||||||||||||
| 言語 | en | |||||||||||||
| item_10002_source_id_9 | ||||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||||
| 収録物識別子 | 2432-2830 | |||||||||||||
| item_10002_source_id_11 | ||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||
| 収録物識別子 | AA12767505 | |||||||||||||
| item_10002_relation_11 | ||||||||||||||
| 識別子タイプ | EISSN | |||||||||||||
| 関連識別子 | 2758-3953 | |||||||||||||
| 情報源 | ||||||||||||||
| 識別子タイプ | Local | |||||||||||||
| 関連識別子 | fra_k_49_21 | |||||||||||||
| 出版タイプ | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
