Abstract
Tidal flat restoration was carried out from Apr. 2010 by opening the floodgates on the concrete dike, which was constructed for reclamation. The restoration site is about 2ha and located in the inner part of the bay (Ishibuchi in Shima city). Improvements were evaluated by monitoring sediment quality, benthic abundance and species diversity every season. Before the restoration, only 6 species of macro faunas, which lives in brackish water, were found. After the opening of the floodgate, the macro faunas was changed from brackish to saltwater and the number of species gradually increased. After 6 months, 22 kinds of juvenile fish, migratory macro faunas and small clams were found in the restoration tidal flat. At the same time, the COD and AVS in sediment decreased. in the restoration tidal flat.
