Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Microcrustacean Community Dynamics in Upo Wetlands: Impact of Rainfall and Physiochemical Factor on Microcrustacean Community

우포늪의 미소갑각류 군집 동태: 강우량 및 이화학적 요인이 미소갑각류 군집 분포에 미치는 영향

  • Choi, Jong-Yun (Department of Biological Sciences, Pusan National University) ;
  • Kim, Seong-Ki (Department of Biological Sciences, Pusan National University) ;
  • La, Geung-Hwan (Department of Environmental Education, Sunchon National University) ;
  • Jeong, Kwang-Seuk (Department of Biological Sciences, Pusan National University) ;
  • Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University) ;
  • Kim, Tae-Kyu (National Institute of Environmental Research) ;
  • Joo, Gea-Jae (Department of Biological Sciences, Pusan National University)
  • Received : 2012.05.18
  • Accepted : 2012.08.18
  • Published : 2012.09.30
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Abstract

The relationships between environmental factors and the dynamics of the microcrustacean community, including planktonic or epiphytic cladocerans and copepods, were studied at Upo Wetlands from 2001 to 2010. Among 10 identified cladoceran taxon, epiphytic cladocerans (Alona, Camptocercus, Simocephalus, Diaphanosoma, Sida) and planktonic cladocerans (Bosmina, Ceriodaphnia, Daphnia, Moina, Scapholeberis) showed distinctive patterns in appearance throughout the year. Overall, epiphytic cladocerans were more abundant during the aquatic plant development season (May to Nov.), planktonic cladocerans were similarly distributed throughout the seasons, but showed a lower density than epiphytic cladocerans. The seasonal changes in copepods abundance showed a similar seasonal pattern when compared to epiphytic cladocerans. Planktonic cladocerans showed no significant relationship to rainfall and physico-chemical factors, while epiphytic cladocerans exhibited a distinct relationship with rainfall and water temperature (n=120, p<0.01), and a negative relationship with pH and conductivity (n=120, p<0.05). Among the epiphytic cladocerans, the Alona and Diaphanosoma showed a distinctive correlation with environmental factors, and their density was affected by rainfall and water temperature (n=120, p<0.01). Copepods had a positive relationship with rainfall (n=120, p<0.01) and water temperature (n=120, p<0.05). In conclusion, changes in rainfall and water temperature can affect the seasonal changes of microcrustacean community and abundance in Upo Wetlands.

미소갑각류 군집과 이화학적 요인 간의 관계를 파악하기 위해 우포늪에서 2001년부터 2010년 동안 2주 간격으로 조사를 수행하였다. 조사 시간 동안, 총 10속의 지각류가 동정되었으며, 서식 형태에 따라 구분된 부착성 지각류(Alona, Camptocercus, Simocephalus, Diaphanosoma, Sida)와 부유성 지각류(Bosmina, Ceriodaphnia, Daphnia, Moina, Scapholeberis)의 연 출현이 매우 상이한 것으로 나타났다. 부유성 지각류는 봄과 가을 시기에 높은 밀도로 나타났으며, 부착성 지각류는 여름 시기에 상대적으로 높은 밀도를 보였다. 요각류 성체와 유생 또한 부착성 지각류와 유사한 계절적 분포 경향을 나타내었다. 부유성 지각류는 강우량과 이화학적 요인과 상관성을 보이지 않았으나, 부착성 지각류는 이화학적 요인 중 수온과 뚜렷한 상관성을 보였다(n=120, p<0.01). 특히 부착성 지각류 중 Chydoridae는 강우량 및 수온과 양의 상관관계를(n=120, p<0.01), 용존산소와 전기전도도와는 음의 상관관계를 나타냈다(n=120, p<0.05). 요각류 군집은 강우량(n=120, p<0.01) 및 수온(n=120, p<0.05)과 양의 상관관계를 나타내었다. 결론적으로 우포에서 강우량은 미소갑각류 군집 분포를 결정하는 매우 중요한 요인인 것으로 파악되었다.

Keywords

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