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Repercussions of the Great East Japan Earthquake tsunami on ellipsoidal Alexandrium cysts (Dinophyceae) in Ofunato Bay, Japan

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タイトル: Repercussions of the Great East Japan Earthquake tsunami on ellipsoidal Alexandrium cysts (Dinophyceae) in Ofunato Bay, Japan
著者: Matsuoka, Kazumi / Ikeda, Yuri / Kaga, Shinnosuke / Kaga, Yoshimasa / Ogata, Takehiko
発行日: 2018年 4月
出版者: Elsevier Ltd.
引用: Marine Environmental Research, 135, pp.123-135; 2018
抄録: Shellfish aquaculture in Ofunato Bay, Northeast Japan, was seriously damaged by a tsunami generated by the Great East Japan Earthquake, March 11th, 2011, accompanied by paralytic shellfish poisoning (PSP) outbreaks caused by Alexandrium tamarense (Dinophyceae). To understand longer future trends of PSP, an investigation was made of the historical occurrence and causes of Alexandrium outbreaks after the tsunami. Vertical distributions of Alexandrium cysts in two sediment-cores from Ofunato Bay revealed that the sediments above ca. 25 cm were eroded, re-suspended and re-deposited, and they included unusually abundant Alexandrium cysts. This abundance of cysts was due to re-deposition of older sediments by the tsunami. The first Ofunato Bay PSP incident was in 1961 after the Chilean Earthquake tsunami and was probably caused by similar unusual blooms of Alexandrium germinated from older sediments as the Great East Japan tsunami, together with nutrient enrichment because of population increase at the start of shellfish aquaculture.
キーワード: Alexandrium cyst / Chilean tsunami / Great East Japan Earthquake / Ofunato Bay / Paralytic shellfish poisoning / Sediment
URI: http://hdl.handle.net/10069/38432
ISSN: 01411136
DOI: 10.1016/j.marenvres.2018.01.001
権利: © 2018 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
資料タイプ: Journal Article
原稿種類: author
出現コレクション:080 学術雑誌論文

引用URI : http://hdl.handle.net/10069/38432



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