• 한국물환경학회지
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• 제29권5호
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• pp.641-647
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• 2013

We installed mesocosms including zooplankton, fishs, artificial marshy land and aquatic macrophytes in Kyoungan stream to study the reduction effects of algae from Sep. 16 to Oct. 28, 2011. The control tendency of phytoplankton taxa was compared by analyzing community structure and dominant species in each mesocosm. Under the condition where Bluegill was absent, Daphnia similoides showed good effect of algal control since it has large food area and has high grazing pressure. Bluegill selectively preys upon large zooplankton, Daphnia similoides, as it also preys on small zooplanktons that flow in. In condition that Bluegill was absent, Daphnia similoides preyed selectively large phytoplankton (Cryptomonas ovata). Due to the shading of light, removal of nutrients and providing refuge for small zooplanktons, aquatic macrophytes and artificial marshy land showed high level of algal control. In corrals with aquatic macrophytes and artificial marshy land, the dominancy of genus Coelastrum and Pediastrum, which are difficult for small zooplanktons to feed on, relatively increased. In conclusion, under conditions of small number of predators such as Bluegill, Daphnia similoides is thought to be useful in algal bloom; however, when lots of predators are present, using small sized zooplanktons along with artificial marshy land and aquatic macrophytes is thought to be more useful than using large zooplanktons.

• 환경영향평가
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• 제27권1호
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• pp.83-91
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• 2018

호소의 경관성을 향상 시킬 수 있은 자연정화법인 인공식물섬을 설계하고 수질개선 효율을 향상시키기 위하여 여재, 식생과 물벼룩을 혼용하는 방법을 개발하였다. 따라서 조류 제거 효율을 알아보기 위한 각 혼합시스템은 G-BD-여재와 물벼룩, G-OB-식물과 여재, G-BOD-여재 식물과 물벼룩, G-C-대조군으로 실험 및 평가하였다. 각 혼합시스템 현장적용성을 평가하기 위하여 chl-a, TN과 TP의 제거효율을 조사 하였고, 그 결과 G-BD의 평균제거 효율은 69.24%, 16.61%, -0.61%; G-OB는 평균 68.39%, 14.11%, 10.52%; G-BOD는 평균 78.30%, 6.69%, 25.09%; G-C는 평균 35.42%, -3.47%, -25.18%로 조사되었다. 결과에 따라 제안하면 여재, 식생과 동물플랑크톤을 혼용한 시스템이 조류제어방면에서 효율적으로 나타났다. 하지만 영양염류 제어관리에서는 식생과 여재를 혼합한 시스템이 가장 효율적이다.