Abstract
The Heiwajima Tidal Flat was replaced and developed in Omori Hometown Shore Project in August at 2002, and ecological and soil survey have been conducted. Heiwajima Beach was constructed in June at 2004. As the beach and tidal flat have different soil property, it was considered that the species of benthos would be different. So, we conducted ecological and soil survey on the tidal flat and the beach in September at 2004. Furthermore, we compare this tidal flat with some other tidal flat near Tokyo Port on the soil and ecological characteristics. It was found that the species of benthos in the Heiwajima beach was similar to that in Heiwajima tidal flat and some tidal flat in Port of Tokyo Port. As the result ofthis survey, it is suggested that benthos in replaced and developed tidal flat becomes similar to that in tidal flat nearby within a few years.
