ALGAE

The Korean Society of Phycology (한국조류학회(藻類))
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Effects of Heated Effluents on the Intertidal Macroalgal Community Near Gori Nuclear Power Plant

고리원전의 온배수 방출이 주변 해조군집에 미치는 영향

  • Kim, Young-Hwan (School of Life Sciences, Chungbuk National University) ;
  • Ahn, Jung-Kwan (School of Life Sciences, Chungbuk National University) ;
  • Yoon, Hee-Dong (School of Life Sciences, Chungbuk National University) ;
  • Jang, Min-A (School of Life Sciences, Chungbuk National University)
  • Published : 2007.12.01
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Abstract

This study is intended to clarify the effects of heated effluents on intertidal benthic marine algal community in Korea. The species composition and biomass of marine algae at the discharge canal of Gori nuclear power plant on the southeastern coast of Korea were investigated seasonally from February 2001 to October 2006. As a result, 54 species (7 blue-green, 12 green, 9 brown and 26 red algae) of marine algae were found at the discharge canal during the past six years. In general, the number of species observed was abundant during winter to spring and less in autumn. Enteromorpha compressa, E. intestinalis, E. prolifera and Caulacanthus ustulatus were common species found more than 80% frequency during the study period. Seasonal fluctuations of mean biomass were 1-440 g dry wt m–2 and dominant species in biomass were Enteromorpha spp. (contribution to a total biomass proportion 28%), Sargassum horneri (14%) and Amphiroa beauvoisii (14%). It is evident from the floristic composition and biomass data that unique micro-environment of the discharge canal support different communities from those on the intake or control area. Results from the large numbers of surveys before and during plant operation showed that, in the regions influenced by thermal effluents such as the discharge canal of power plants, the process of ecological succession has been proceeded. It is assumed that the uni-directional water flow and the time of overhaul largely affect the development and succession of benthic marine algal communities of the discharge canal.

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References

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