... population in the 5 artificial tidal flats and the natural tidal flat. The abundance of macrobenthos in the 5 artificial tidal flats increased after May 28 and finally exceeded that in the natural ... activities. The basement material would be covered with sandy media such as mountain or sea sands. However, compared with natural tidal flats, the biota appearing in the artificial tidal flats constructed ... crustaceans, fish and birds (Day et al., 1989; Evans et al., 1998), and also play a role in water purification by the tidal flats (Herman et al., 1999; Magni and Montani, 2006). Certain bivalves,...