한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제26권4호
  • /
  • Pages.614-621
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  • 2010
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  • 2289-0971(pISSN)
  • /
  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

서로 다른 영양조건의 농업용 저수지에서 말조개의 수질개선능 비교

Comparisons of Water Quality Improvement Activities of Indigenous Freshwater Bivalve Unio douglasiae in Two Different Trophic Agricultural Reservoirs

  • 유영훈 (건국대학교 환경과학과) ;
  • 이송희 (건국대학교 환경과학과) ;
  • 황순진 (건국대학교 환경과학과) ;
  • 김백호 (건국대학교 환경과학과)
  • You, Young-Hun (Department of Environmental Science, Konkuk University) ;
  • Lee, Song-Hee (Department of Environmental Science, Konkuk University) ;
  • Hwang, Soon-Jin (Department of Environmental Science, Konkuk University) ;
  • Kim, Baik-Ho (Department of Environmental Science, Konkuk University)
  • 투고 : 2010.02.10
  • 심사 : 2010.05.25
  • 발행 : 2010.07.30
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초록

A indigenous freshwater bivalve Unio douglasiae was introduced to compare the differences in the efficacy of algal bloom control and the appearances of mussel-mediated adverse effects between two different reservoirs such as mesotrophic (Shingu r.) and hypertrophic (Seokmun r.). We constructed the study mesocosm in the shore of each reservoir, stocked the mussel at density of $30indiv./m^3$ for 7 days, and measured daily the phytoplankton density and water quality. In mesotrophic reservoir, even though approximately 38% of suspended solids and chlorophyll-a was reduced by stocked bivalves for the first 3 days, algal density, ammonia and soluble reactive phosphorus gradually increased with increasing mussel death. In hypertrophic reservoir, mussels strongly inhibited suspended solids and chlorophyll-a by the termination of study with no increase of mussel death and nutrient, especially ammonia concentration. In both reservoirs, a strong selectivity showed mussels preferred to diatom rather than cyanobacteria and green algae without algal density and nutrient level. Our results indicate that an introduction of freshwater bivalve U. douglasiae is more strategic to improve water quality of hypertrophic than mesotrophic reservoir, but many preliminary studies on the treatment method and the selection of target water system are required.

키워드

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