Journal of Oceanography

, Volume 42, Issue 6, pp 481–486 | Cite as

Growth inhibition of a red tide flagellate,Chattonella antiqua by copper

  • Yasuo Nakamura
  • Kazuhiro Sawai
  • Masataka Watanabe
Article

Abstract

Copper toxicity inChattonella antiqua (Raphidophyceae) was examined using an artificial seawater medium. The growth rate (Μ) was found to be a unique function of cupric ion activity (acu) as follows:
$$\mu = \mu _{\max } /(1 + K(a_{Cu} )^2 ),$$
whereΜmax andK are. 0.63 d−1 and 2.4×1020mol−2l2, respectively. The value ofacu at whichΜ is reduced to half the maximum is 10−10.2 M.

A comparison of our results with those for other phytoplankton species indicatedC. antiqua to be rather sensitive to cupric ions. Furthermore, the growth ofC. antiqua was strongly influenced at the calculated cupric ion activity of natural seawater in the Seto Inland Sea, assuming only inorganic copper complexation. Thus, organic chelation may be necessary beforeC. antiqua is capable of competing with other phytoplankton species.

Keywords

Phytoplankton Phytoplankton Species Natural Seawater Graphite Furnace Atomic Absorption Spectrophotometry Artificial Seawater Medium 

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Copyright information

© Oceanographical Society of Japan 1986

Authors and Affiliations

  • Yasuo Nakamura
    • 1
  • Kazuhiro Sawai
    • 1
  • Masataka Watanabe
    • 2
  1. 1.Laboratory of Marine EnvironmentThe National Institute for Environmental StudiesIbarakiJapan
  2. 2.Faculty of EngineeringScience University of TokyoTokyoJapan

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