LONG TERM EFFECTS OF ARTIFICIAL REEF OF SCALLOP SHELL AND EXAMINATION FOR PRACTICAL USE

Abstract

  We developed "Artificial Reef of Scallop Shell" using waste. The reef creates the biotope for the detritus feeders to the space between the shells and it is useful for the removal of organic pollutant in the port. For an attempt using the experimental small reefs,even if three years have passed since they were installed, the continuation of the effect was confirmed. Then, the process was reproduced by ecosystem model. To achieve a further effect, Large-scale reef shell was installed. However the amount of the swarming species has decreased, it is due to lack of water exchange in the central portion. Then, we developed "Practicable Artificial Reef of Scallop Shell" with pass hole. As a result, the species swarmed in the central portion, the effect was proven.