海中有機懸濁物生成に関与する消化管由来菌の役割-2-各種海洋動物消化管由来菌のフロック形成

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Twelve strains of fecal bacteria were isolated form several species of marine animals and used to study floc formation in seawater. The isolated bacteria grew well in media enriched with protein broth, not only in filtered natural seawater, but also in artificial seawater with or without divalent cations (Mg, Ca) However, bacterial flocculation during the growth process was evident in both natural and artificial seawater media with Mg and Ca ions. The pattern or magnitude of bacterial floc formation differed with the bacterial strains examined. A few bacterial strains having strong flocculation capacity produced obviously large flocs in seawater. Divalent cations (Mg, Ca) in freshwater medium also had a noticeable effect on the floc formation of two bacterial strains isolated from the intestinal contents or the feces of freshwater fishes. These exeperimental results seem to suggest that the intestinal bacteria voided from marine animals are the primary participants in the formation of organic suspended matter in the marine environment.
日本水産學會の論文