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

Abstract

-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. 핵심용어 : 와편모조류, Akashiwo sanguinea, 수온, 염분, 광 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(0.28 day -1 ) was observed with combination of 25 and 30 psu. Optimal growth ( 80 % of maximum specific growth rate) was obtained at 25 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 μ=0.31(I-16.87)/(I+51.19). The compensation photon flux density (I0) and half-saturation photon flux density (KI) were 16.87 μmol m -2 s -1 and 84.93 μmol 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.