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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第68巻 第1号 >

Different Nutrient Availabilities of Surface and Bottom Water under Nutrient-depleted Conditions during Bloom Formation of the Toxic Dinoflagellate Alexandrium tamarense in Osaka Bay, Japan

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この文献には次のDOIがあります:http://doi.org/10.14943/bull.fish.68.1.7

タイトル: Different Nutrient Availabilities of Surface and Bottom Water under Nutrient-depleted Conditions during Bloom Formation of the Toxic Dinoflagellate Alexandrium tamarense in Osaka Bay, Japan
著者: Natsuike, Masafumi 著作を一覧する
Shiraishi, Tomotaka 著作を一覧する
Ishii, Ken-Ichiro 著作を一覧する
Yamamoto, Keigo 著作を一覧する
Nakajima, Masaki 著作を一覧する
Sawayama, Shigeki 著作を一覧する
Imai, Ichiro 著作を一覧する
キーワード: Alexandrium tamarense
Skeletonema
Nutrients
Bioavaiilability
Osaka Bay
Algal growth potential
Limiting
発行日: 2018年 3月16日
出版者: 北海道大学大学院水産科学研究院
誌名: 北海道大学水産科学研究彙報
巻: 68
号: 1
開始ページ: 7
終了ページ: 16
抄録: Alexandriium tamarense is a toxic dinoflagellate known to produce neurotoxins cause paralytic shellfish poisoning to human and marine animals. To understand the growth dynamics of A.tamarense, the seasonal changes in A,tamarense vegetative cells and environmental factors were evaluated using monthly field observations at two fixed stations in Osaka Bay, Japan, from January to May 2008. Additionally, a bioassay with axenic A.tamarense clonal cultures was performed to determine the growth potentials and growth-limiting nutrients of seawater samples collected during the field observations. The density of A.tamarense increased from February to April, and depletions of dissolved phosphate and silicate were observed in the surface layer during this period. The bioassay showed that phosphorous limitation occurred at the surface water of one station during March and April, while nitrogen limitation occurred in the bottom water. Moreover, at the other station, the growth potentials of the bottom water were higher than those of the surface water during February and April. Thus, the differences of nutrient availabilities between surface and bottom water during spring in Osaka Bay potentially allow A.tamarense to grow with nutrients uptake from bottom water by vertical migration.
資料タイプ: bulletin (article)
URI: http://hdl.handle.net/2115/68502
出現コレクション:第68巻 第1号

 

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