SUMMER DISTRIBUTION OF PICOPHYTOPLANKTON IN THE NORTH YELLOW SEA Spatial and temporal variation of picophytoplankton in the Pearl River Estuary Wintertime picophytoplankton distribution and its driving factors in the southern South China Sea Spatial and temporal distribution of silicate and chlorophyll a in the coastal waters with picophytoplankton algal bloom Biodiversity and research progress on picophytoplankton in saline lakes Size fraction of chlorophyll a during and after brown tide in Qinhuangdao coastal waters