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http://dx.doi.org/10.5322/JESI.2013.22.12.1571

Effects of Irradiance on the Growth of the Toxic Dinoflagellates Alexandrium tamarense and Alexandrium catenella  

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)
Publication Information
Journal of Environmental Science International / v.22, no.12, 2013 , pp. 1571-1577 More about this Journal
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.
Keywords
Alexandrium tamarense; Alexandrium catenella; Irradiance; Growth; Masan Bay;
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