Subtidal marine algal community of Jisepo in Geoje, Korea

Abstract

The seasonal variations of the marine algal community were studied with quadrat method during June 2005 to May 2006 at subtidal zone of Jisepo at Geoje. In this area, a total of 59 marine algal species including 8 Chlorophyta, 11 Phaeophyta and 40 Rhodophyta was identified. The representative species in each study sites throughout the year are Ulva pertusa, Codium adhaerens, C. fragile, Colpomenia sinuosa, Dictyota dichotoma, Dilophus okamurae, Sargassum horneri, Gelidium amansii, Lithophyllum okamurae, Amphiroa dilatata, Corallina pilulifera, Grateloupia elliptica, G. turuturu, Prionitis cornea, Plocamium telfairiae, Chondracanthus intermedia, Lomentaria catenata, Acrosorium polyneurum and Melobesioidean algae. The dominant species among the representative species in importance value were Ulva pertusa, Undaria pinnatifida, Sargassum horneri, Gelidium amansii, Prionitis cornea and Amphiroa dilatata. Dry weight of total vegetation, the most luxuriant period appears in spring season and the poorest one in summer period. The total dry weight of the vegetation in spring season is very high rather than the summer season. On the basis of group-average using PRIMER, the 6 study sites were classified into two groups; two clusters emerge at the 50 level of threshold. The R/P, C/P, and (R+C)/P value were 3.63, 0.73, and 4.36, respectively.