Physiological responses of two typical species of diatoms to phosphorus stress in Yellow Sea
黄海两种典型硅藻的磷胁迫生理研究

Using batch culture experiments,this study was focused on the physiological responses of Chaetoceros curvisetus and Skeletonema marinoi,two typical diatoms in the Yellow Sea,to phosphorus stress.The results showed that both of the test species could utilize the different phosphorus pools from ambient and cells to dissimilar extent under phosphorus stress.S.marinoi preferred utilizing soluble reactive phosphorus(SRP) from ambient while C.curvisetus liked to utilize particulate phosphorus in cells.Due to different abilities and strategies of utilizing SRP and soluble nonreactive phosphorus(SNP),S.marinoi might be a more advantaged competitor in SRP condition while C.curvisetus might be a more advantaged competitor in SNP condition.These results might be helpful to explaining the reason why the two species can out-compete others in frequent diatom bloom in the Yellow Sea.