Abstract
In Hamada fishing port of Shimane Prefecture, the improvement works are underway with a campaign of “Development of Fishing Port in Harmony with Nature” in line with “Marinovation Plan”. In construction of the huge submerged mound in front of the breakwater and the revetment, the construction method to add the function of seaweed bed has been applied, considering disappearance of a part of better coast due to the improvement works. After completion of a part of the submerged mound, the site investigation was carried out 12 times during 5 years to verify the effect of the works. On the basis of the monitoring survey results for seaweed communities, the effect of function of seaweed bed was verified and evaluated using the change of dominant species and the similarity index of seaweed commnities.
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