Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Growth Response of the Dinoflagellate Akashiwo sanguinea in Relation to Temperature, Salinity and Irradiance, and its Advantage in Species Succession

무각 와편모조류 Akashiwo sanguinea의 수온, 염분 그리고 광 조건에 따른 생장반응과 그에 따른 종 천이의 이점

  • Kwon, Hyeong-Kyu (Korea Inter-University Institute of Ocean Science, Pukyong National University) ;
  • Oh, Seok-Jin (Department of Oceanography, Pukyong National University)
  • 권형규 (부경대학교 해양과학공동연구소) ;
  • 오석진 (부경대학교 해양학과)
  • Received : 2013.10.04
  • Accepted : 2014.02.25
  • Published : 2014.04.28
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Abstract

The effects of temperature, salinity and irradiance on the growth of the dinoflagellate Akashiwo sanguinea isolated from Jaran Bay were examined in the laboratory. Maximum specific growth rate($0.28day^{-1}$) was observed with combination of $25^{\circ}C$ and 30 psu. Optimal growth (${\geq}80%$ of maximum specific growth rate) was obtained at $25^{\circ}C$ with salinities of 15~35 psu. This results indicated that A. sanguinea is a stenothermal of the high water temperature and euryhaline species. The irradiance-growth curve was described as ${\mu}=0.31(I-16.87)/(I+51.19)$. The compensation photon flux density ($I_0$) and half-saturation photon flux density ($K_I$) were $16.87{\mu}mol\;m^{-2}s^{-1}$ and $84.93{\mu}mol\;m^{-2}s^{-1}$, respectively. In conclustion, A. sanguinea has advantage physiological characteristics for the species succession at the coastal areas in summer with sufficient irradiance, high water temperature and large salinity gradient.

자란만에서 분리한 와편모조류 Akashiwo sanguinea의 성장에 대한 수온, 염분 및 광 조건을 실내실험을 통해서 살펴보았다. A. sanguinea의 최대성장속도($0.28day^{-1}$)는 수온 $25^{\circ}C$, 염분 30 psu로 나타났으며, 최적성장(최대성장속도의 80 % 이내 구간)은 수온 $25^{\circ}C$의 염분 15~35 psu로 나타났다. 따라서 A. sanguinea는 고수온의 협온성이며, 광염성의 생리학적 특성을 가지고 있는 것으로 판단된다. 광량에 따른 성장 실험결과에서 유도된 성장식은 ${\mu}=0.31(I-16.87)/(I+51.19)$로, 보상광량($I_0$) 값은 $16.87{\mu}mol\;m^{-2}s^{-1}$, 반포화광량($K_I$) 값은 $84.93{\mu}mol\;m^{-2}s^{-1}$으로 나타났다. 결론적으로 A. sanguinea는 하계에 충분한 광, 높은 수온, 염분의 변동 폭이 큰 연안해역에서 종 천이를 위한 유리한 생리학적 특성을 보이는 것으로 판단된다.

Keywords

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