Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Effects of Irradiance on the Growth of the Toxic Dinoflagellates Alexandrium tamarense and Alexandrium catenella

유독와편모조류 Alexandrium tamarense와 Alexandrium catenella의 성장에 미치는 조도의 영향

  • Kwon, Hyeong-Kyu (Department of Oceanography, Pukyong National University) ;
  • Park, Ji-A (Department of Oceanography, Pukyong National University) ;
  • Yang, Han-Soeb (Department of Oceanography, Pukyong National University) ;
  • Oh, Seok Jin (Department of Oceanography, Pukyong National University)
  • Received : 2013.01.11
  • Accepted : 2013.06.12
  • Published : 2013.12.31
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Abstract

The effects of irradiance on the growth of toxic dinoflagellates Alexandrium tamarense (Masan Bay strain) and Alexandrium catenella (Jinhae Bay strain) were investigated in the laboratory. At $15^{\circ}C$ and 30 psu for A. tamarense and $25^{\circ}C$ and 30 psu for A. catenella, the irradiance-growth curve showed the maximum growth rate (${\mu}_{max}$) of 0.31 $day^{-1}$ with half-saturation photon flux density (PFD) ($K_I$) of 44.53 ${\mu}molm^{-2}s^{-1}$, and a compensation PFD ($I_c$) was 20.67 ${\mu}molm^{-2}s^{-1}$ for A. tamarense, and ${\mu}_{max}$ of 0.38 $day^{-1}$ with $K_I$ of 59.53 ${\mu}molm^{-2}s^{-1}$, and $I_c$ was 40.80 ${\mu}molm^{-2}s^{-1}$ for A. catenella. The $I_c$ equated to a depth of 8~9 m from March to June for A. tamarense and 6~7 m from March to June for A. catenella. These responses suggested that irradiance at the depth near the middle layer in Masan Bay would provide favorable conditions for two species.

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References

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