Changes in Sediment Properties and Distribution of an Isopod and Amphipod on a Sandy Beach Shoreline with Tidal Fluctuations

In this study, the relationship of tidal changes on a sandy coast, and emergence and distribution of sand burrowing an isopod and amphipod was examined over tidal cycles. As a result, the sand burrowing an isopod and amphipod that appeared in this study, moved from the initial fixed point of emergence to offshore as the tide falls. In addition, when the gradient of the shore becomes gentle, distribution area is spread, density fell. Generation point of sand ripples are fixed without moving to the offshore side. These results zonation sand burrowing small crustaceans in sandy coastal shoreline areas is according to the findings of the Sea of Japan (Fluctuations in the suction of change and sediment environment associated with it, Changes in littoral drift behavior typified by the generation of sand ripple and step), variations in tide became clear that affect within the range.