Abstract
In order to find out any influence on the seaweed-bed exerted by sea water turbidity, the occurrence of seaweed zoospores adsorbed into suspended matters during their spent season, and the sedimentation velocity of those zoospores combined with suspended matters, and also the probability of their insertion on a base-plate were examined. In the experiment, Ecklonia cava and Undaria pinnatifida were used for the seaweeds and Kaolinite for the material of suspended matters. As a result, it had been concluded that the occurrence of zoospores adsorbed into suspended matters has nothing to do with whether they have flagella or not and the attainability of such adsorption escalates with turbidity concentration; that the sedimenta-tion velocity of zoospores themselves in the filtered sea water is in a range from 0.65 to 0.90cm but it decreases when they are adsorbed into suspended matters; that the insertion of zoospores on the base-plate is disturbed not only by their adsorption into suspended matters but also by suspended matters themselves adhered on the plate.
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