Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Oxygen Fluctuation Monitored with High Frequency in a Eutrophic Urban Stream (the Anyang Stream) and the Effect of Weather Condition

부영양 도심하천(안양천)에서 고빈도 관측에 의한 산소고갈과 기상조건의 영향 연구

  • Kim, Sun-Jung (Department of Environmental Science, Kangwon National University) ;
  • Shin, Myoung-Sun (Department of Environmental Science, Kangwon National University) ;
  • Kim, Jai-Ku (Department of Environmental Science, Kangwon National University) ;
  • Lee, Jae-Yong (Department of Environmental Science, Kangwon National University) ;
  • Jeong, Karp-Joo (Institute for Ubiquitous Information Technology and Applications, Kunkuk University) ;
  • Ahn, Bu-Young (Korea Institute of Science and Technology Information) ;
  • Kim, Bom-Chul (Department of Environmental Science, Kangwon National University)
  • Received : 2011.10.21
  • Accepted : 2012.01.30
  • Published : 2012.03.31
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Abstract

The variation of dissolved oxygen (DO) was monitored with high frequency by an automatic data-logging sensor in a eutrophic urban stream (the Anyang Stream) located in a metropolitan area of Seoul, South Korea. In general, DO showed the diel variation of increase in daytime and decrease at night, implying that primary production is a major mechanism of oxygen supply in this ecosystem. The fluctuation of oxygen was determined by rainfall. DO depletion was most obvious after a rainfall resulting in an anoxic condition for a day, which is thought to be caused by scouring of periphyton and organic ooze at the stream bottom. Seasonally DO was higher in winter and frequently depleted in warm seasons. DO depletion was often at a dangerous level for fish survival. Fish survey showed that little fish was living at the study site and oxygen depletion may be the major stress factor for aquatic animals. From the results it can be suggested that a high frequency monitoring of oxygen should be established for the proper assessment of aquatic habitats and better management strategy.

Keywords

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