First Record of the Harmful Raphidophyte <i>Chattonella marina</i> Bloom in Rushan Coast, China in 2008 after the Occurrence of the Green Tide

The red tide of Chattonella marina (Subrahmanyan) Hara & Chihara occurred in Rushan coast, Shandong Peninsula, China, in August 2008. Based on the four cruises of routine monitoring and four cruises of monitoring of the red tide in Rushan, the process of the red tide and possible mechanism were analyzed. During the bloom, the maximum area of the red tide was about 100 km2; the maximum average cell abundance of C. marina reached 1.46×106 cells/L; surface water temper-ature ranged between 26.1 °C and 27.2 °C, and salinity between 26.6 ‰ and 30.3 ‰. The material released from the decayed green tide species Ulva prolifera could provide a chance for the bloom of C. marina, combined the optimum sea temperature, light and nutrient condition. It was the first time to link a red tide event with the consequence of the green tide in Yellow Sea, which could give an attention on our future monitoring and management.