Abstract
In the 2nd phase KANSAI international airport island, a gently rubble mound type seawall was adopted over more than 90% of the about 13km-long seawall, and also for the seawall, positive efforts toward seaweed bed formation are being made in order to create rich sea-area environment at early stage.As a result of supply of seaweed seedling that used seaweed blocks utilized in the 1st phase seaweed bed formation and net bag (spore bag) containing sporophylls, the area of the seaweed bed in the 2nd phase airport island where seaweeds are growing was about 18ha in October, 2002. We can say from this result that the artificial seaweed bed formation is contributing to the ecosystem in Osaka bay.
