播磨灘におけるChattonella赤潮の形成に及ぼす細菌の影響

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We investigated the interrelations among phytoplankton, bacteria, and Chattonella sp. in the process of formation of Chattonella sp. bloom in the Sea of Harima.Chattonella antiqua was grown in raw sea water to which inorganic nutrients were added. C. antiqua grew well when inoculated into sea water in which chattonella sp. was present.Suitable communities and characteristics of bacteria were required for the growth of Chattonella sp. in the Sea of Harima.From the end of August through September, the sea was unsuitable for the growth of Chattonella sp. in the Sea of Harima.In the initial stage, the correlation coefficient between concentration of chlorophyll-a(dominant species : Skeletonema costatum) and the population of bacteria was high and S. costatum grew better than Chattonella sp. In mixed cultivations of the bacteria and C. antiqua in a vitamin-deficient mediu, they grew well when they could live together symbiotically while they did not grow when they were not together.
1985-01-25