• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.197-198
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• 2001

일반적으로 해조류가 번무하고 있던 암초지대에서 무엇인가의 원인으로 해조류가 고사ㆍ소멸하고, 그 공간을 석회조류로 불리는 여러 종류의 산호말류 (coralline algae)이 점유하여 암반이 백색 또는 황색, 분홍색을 나타내는 현상을 ‘백화현상’ 이 라고 한다. 현재 추측되는 백화현상의 원인으로는 해양생태계 내에서의 환경변화 - 대기중 이산화탄소의 증가, 지구 온난화에 의한 수온상승, 그리고 연안역의 오염 -와 군집의 동태와 생물학적 작용-엽상형 해조류와 무절석회조류간의 경쟁과 성게를 포함한 초식동물의 초식작용, 질소, 인등의 결핍이 불러오는 빈(貧)영양화 - 에 의해 일어난다고 추측된다 (analysis.cheju.ac.kr.). (중략)

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.2
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• pp.212-219
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• 2019

This study was conducted to investigate marine algal community characteristics and the status of barren ground in the summer at study sites on Jeju Island, Korea. Sampling was carried out from July to September 2017 using a qualitative and quantitative survey (including coverage of non-geniculated coralline algae and density of grazer) by scuba diving. A total of 121 species were identified, including 11 (9.1 %) green algae, 24 (19.8 %) brown algae, and 86 (71.1 %) red algae. Hyeongjeseom had the greatest diversity, with 60 species, and Harye the least, with 18 species. The mean biomass at the study sites was $1,503.0g{\cdot}m^{-2}$, while the mean for the neighboring islets ($3,268.7g{\cdot}m^{-2}$) was higher than that of the main island ($914.7g{\cdot}m^{-2}$). Also, dominant species was identified: Sargassum macrocarpum at the neighboring islets, and Ecklonia cava at the main island, with differences showing not only in biomass but also species composition. In conclusion, the marine algal community status in summer at the study sites was evaluated based on the algal community characteristics (species composition, biomass, biomass ratio of kelp species), coverage of non-geniculated coralline algae, and density of grazer. As a result, both Hyeongjeseom and Marado require preservation and management to maintain their excellent marine algal communities, and other sites on the main island require the creation and/or restoration of marine algal communities. In addition, as the generation of barren ground accelerates, it is urgent not only to grasp existing monitoring research but also to identify the status of the marine algal community where it is not known at present.