Free polyamines during algae bloom succession in the East China Sea in spring 2011

The predominant polyamines(spermine, putrescine and spermidine) of seawater in the area of frequent red-tide occurrence of the East China Sea in spring 2011 were measured by HPLC. The results showed that putrescine, spermidine and spermine in the survey area ranged between 0~48, 3~11 and 2~17nmol/L respectively. The average concentration of putrescine was the highest, followed by spermidine and spermine. During diatom bloom that dominated by Skeletonema costatum and dinoflagellate bloom that dominated by Prorocentrum donghaiense occurring, polyamine concentration was relatively higher in area where algae bloom broke out. Polyamine concentration varied with process of algae bloom outbreak, and showed correlation with DOC, POC, DON and C/N.