남해 동부 연안해역 하계 해조식생의 생태학적 평가

For the ecological evaluation of marine algal flora, their communities were examined at 8 sites at eastern coast of Namhae, Korea, from August 7 to August 15, 2015. A total of 125 species, comprising 10 green, 15 brown, 100 red algal, was identified. Gelidium elegans, Ulva australis, Lithophyllum okamurae and Hypnea charoides were represent in all sites. The flora investigated could be classified into six functional groups such as coarsely branch form 48.0%, thick leather form 13.6%, filamentous form 12.0%, jointed calcareous form 11.2%, crustose form 8.0% and sheet form 7.2% during the study period. Two ecological state group(ESG) were evaluated based on these functional groups. While ESGⅠ, the late successional species group, formed 32.8% of the algal community; ESGⅡ, composed of opportunistic species, comprised 67.2%. The average ecological evaluation index (EEI) of eastern coast of Namhae, Korea was 4.0, and that of Tongyeong and Namhae was 4.7 and 4.5, and that of Goseong and Geoje was 4.0 and 2.5, so the ecological environments of Goseong and Geoje were not so good as Tongyeong and Namhae. Physiognomic analysis indicated an inland sea type at Chubongdo, Yeondaedo, Beokryeon, Songjeong, Donghwa and Mangchi. On the other hand, physiognomic analysis indicated an open sea type at Maemuldo and Susan. A cluster analysis of species occurrence suggested that the number of marine algal species differed among the sampling sites. The state of the coastal environment were determined using a community indices. Environmental conditions according to dominance index(DI) and diversity(H`) was "normal" at southern coast of Korea in summer. To evaluate of environmental assessment using to marine algae, changes in marine algal communities constantly should be studied.