Taxonomic study of dinoflagellate cysts in Changjiang Estuary in the winter of 2006 Seasonal Fluctuation of Scrippsiella trochoidea Cyst Populations in Daya Bay, South China Sea Distribution of dinoflagellate cysts in Changjiang Estuary during the winter of 2006—2007 and their relationship with the environment Research on the distribution of dinoflagellate cysts in the surface sediments of the XiPi Reservoir in the Jiulong River Distribution and germination of Alexandrium sp.cysts in coastal areas of Southeast China Sea Distribution of dinoflagellate cysts from Changjiang River Estuary in the spring of 2004