A Preliminary Study on Prediction of Dissolved Oxygen Lack After Near Shore Red Tide Occurrence and Biological Prevention of Red Tide

Investigation of the dissolved oxygen lack after near shore red tide occurence was carried out during period of a Skeletonema costatum red tide occurred in Bachimen caged marine culture area of Dongshan County of Fujian Province.The concentration of dissolved oxygen (DO) during and after the red tide occurrence was monitored for both on scene and indoor mimic water systems.Gracilaria,a kind of large algae,was applied to the red tide water to investigate its influence on DO.The results showed that the algae could decrease the effect of DO lack after red tide happened.The indoor mimic method might be adopted to predict the concentration trends of DO on scene after red tide occurred.