Abstract: The species composition of sea weedsZosteramarinaandZ.caespitosa, surface(less than 3 cm deep) of substrate and root (3-15 cm deep) substrate, and water depths were studied at 106 sampling points in the Gulf of Yudai Hill, 35 sampling points around Danzi Island in Yantai, and 31 sampling points in coast of Chudao Peninsula in Rongchen. The correlations between the divergence of two substrata andZosteraspecies were shown to be extremely significant (2test) with the contingency coefficients of 0.612 and 0.640, and that between divergence of water depth andZosteraspecies were statistically significant (2test) with their contingency coefficients of 0.338. The very significant factor affecting the species distribution was the divergence of root depth substrate type, followed by the surface substratum type (contingency coefficient 0.612). The distribution of two sea weed indicated thatZ.marinapreferred to grow in fine sandy and silt, while pebble substrate was selected byZ.caespitosa. The divergences of two species in their rhizomes and roots are adaptative consequence to diverse substratum types. The determination of substrate type is necessary for ensuring a success inZ.marinaandZ.caespitosarestoration before transplantation is carried out.
2012, Vol. 27 
