Studies on the toxicity of tow strains Phaeocystis globosa scherffeto to Artemia sinica Species Diversity and Eco-geographical Distribution of Dinoflagellate Cysts in the Bohai Sea, China Formation of aggregation by Phaeocystis globosa (Prymnesiophyceae) in response to high grazing pressure A review of the relationship between algae and bacteria in harmful algal blooms