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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第61巻 第1号 >

腐植物質が有害ラフィド藻Chattonella antiqua の増殖に与える影響

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Title: 腐植物質が有害ラフィド藻Chattonella antiqua の増殖に与える影響
Other Titles: Effects of humic substances on the growth of the harmful raphidophyte Chattonella antiqua
Authors: 福﨑, 康司1 Browse this author
内藤, 佳奈子2 Browse this author →KAKEN DB
吉岡, 崇仁3 Browse this author →KAKEN DB
澤山, 茂樹4 Browse this author →KAKEN DB
今井, 一郎5 Browse this author →KAKEN DB
Authors(alt): Fukuzaki, Koji1
Naito, Kanako2
Yoshioka, Takahito3
Sawayama, Shigeki4
Imai, Ichiro5
Keywords: Chattonella antiqua
Humic substance
Artificial medium
Culture experiment
Issue Date: 20-Jun-2011
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Journal Title(alt): Bulletin of Fisheries Sciences, Hokkaido University
Volume: 61
Issue: 1
Start Page: 23
End Page: 28
Abstract:  Humic subsatnces (HS) are major components of dissolved organic matter in aquatic systems and known to have a substantial influence on the trace metal speciation, and thus the bioavailability of trace elements. Trace metals, such as iron, frequently act as a crucial limiting factor for phytoplankton growth, and sometimes bloom developments in the sea. The effects of HS on the growth of the harmful red tide phytoplankton, Chattonella antiqua were investigated by using of a chemically defined artificial medium. Humic acid (0.6, 6, 60 and 600 μg L-1) supplied with iron (541 μg L-1 of ferric chloride hexahydrate) had accelerative effects on the growth of C. antiqua. The growth yield was highest in the medium of 6 μg L-1 of humic acid, and 8 times larger than that in the control medium without humic acid. On the contrary, fulvic acid did not enhance the growth of C. antiqua. It is suggested that the composition and concentration of HS possibly affects the bloom developments of C. antiqua by controlling the iron availability. This is the first report of the effects of humic substances on the growth of C. antiqua, raising an insight into the growth physiology of this fish-killing species.
Type: bulletin (article)
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第61巻 第1号

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