Growth of Platymonas helgolandica var.tsingtaoensis,Cylindrotheca closterium and Karenia mikimotoi and their survival strategies under different N/P ratios Nitrogen and phosphorus absorption and growth characteristics of Alexandrium tamarense Effect of water temperature, stocking density and feeding cycle on growth of juvenile Poecilobdella manillensis Effect of environmental factors and algae density on the growth and nutrient uptake in Porphyra yezoensis The utilization of Prorocentrum donghaiense to four different types of phosphorus