Effects of Ground levels and Sediment Qualities on the Roots Branch of Zostera Japonica

Abstract

Relationships between environmental factors (such as the ground level and sediment qualities) and growth conditions of Zostera Japonica were investigated by a growth experiment using a tidal exchange tank. Z. japonica grew up well in the submergence condition which the ground level was below DL: 0m and max temperature was under 29℃. On the mad-sand mixure sediment, the Z. japonica grew up better than on the pure sand and the pure mad sediment. The root branch and the leaf growth were promoted by nutrients in pore water (above 0.15mg-N/L in DIN and 0.015mg-P/L : DIP). Therefore it is clear that the ground levels and the sediment qualities were important environmental factors for the growth of Z. japonica