Seasonal Variation in Community Structure of Subtidal Seaweeds in Jeju Island, Korea

摘要: Marine macroalgal community structures and characteristics of ocean environmental factors were examined seasonally at four sites in Jeju Island, Korea, from March to November 2012. A total 71 species identified, including 9 green, 7 brown, 55 red algae. Peyssonnelia capensis occurred all study seasons. The average annual biomass seaweed was 991.84 g wet , with seasonal variations 543.80 autumn 1,284.17 summer. green alga, Codium coactum, the dominant species, occupying 21.31% (211.39 ) algal Island. Subdominant Ecklonia cava Lithophyllum okamurae, comprising 20.85% (206.75 19.64% (194.75 ), respectively, vertical distribution subtidal seaweeds represented by L. okamurae 5 m depth, C. coactum 10 E. 5-10 depth P. 20 level. In present study, crustose coralline algae, which predominated on barren ground, subdominant sites. Community indices varied between 0.51-0.63 for dominance index (DI), 5.53-8.14 richness (R), evenness (J`), 2.04-2.32 diversity (H`). On basis indices, Sinchang best preserved coastal area, showing maximal values biomass, evenness- diversity-indices, minimal value index, representing stable conditions. contrast, Onpyung Topyeong sites, located near tourist venues such as Udo Seogwipo relatively poor habitats based biomass. results could imply that climate changes alter structure, long-term monitoring is required.