Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Seasonal Variation of Mesozooplankton Communities in the Semi-enclosed Muan Bay, Korea

반 폐쇄된 무안만 중형동물플랑크톤 군집의 계절 변동

  • Moon, Seong-Yong (Department of Biology, College of Natural Science, Gangneung-Wonju National University) ;
  • Seo, Min-Ho (Division of Marine Technology, College of Fisheres and Ocean Science, Chonnam National University) ;
  • Shin, Yong-Sik (Division of Ocean System Engineering, Mokpo National Marine University) ;
  • Soh, Ho-Young (Division of Marine Technology, College of Fisheres and Ocean Science, Chonnam National University)
  • 문성용 (강릉원주대학교 자연과학대학 생물학과) ;
  • 서민호 (전남대학교 수산해양대학 해양기술학부) ;
  • 신용식 (목포해양대학교 해양공과대학 해양시스템공학부) ;
  • 서호영 (전남대학교 수산해양대학 해양기술학부)
  • Received : 2011.04.25
  • Accepted : 2011.11.11
  • Published : 2012.03.30
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Abstract

We investigated seasonal changes in the mesozooplankton community structure in November 2006 and February, May, and August 2007 at 12 stations in the semi-enclosed Muan Bay, Korea. Forty taxa were sampled, with an average abundance ranging from 1,459 to 20,078 indiv. $m^{-3}$; the highest abundance was detected in August 2007, and the lowest in February 2007. Acartia omorii, A. hudsonica, A. ohtsukai, Bestiolina coreana, Calanopia sp., Paracalanus parvus s. l., Cirripedia larvae, Decapoda larvae, and Gastropoda larvae were the most abundant taxa detected. The species diversity of the mesozooplankton was high around the inner regions in August 2007 but it was relatively low in November 2006. Non-metric multidimensional scaling (nMDS) revealed significant differences in the structure of mesozooplankton community among the seasons. Canonical correspondence analysis (CCA), performed to examine the relationships among dominant taxa, stations, and environmental variables, showed that most species of copepods were positively correlated with temperature, salinity, chlorophyll a, and COD concentration. Our results suggested that the mesozooplankton community structure observed in this study might be affected partly by the seasonal changes in environmental variables, such as the status of the sluice gates (i.e., open or closed) and the in situ production of resting eggs by major copepods.

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