Ocean Science Journal

  • 제40권3호
  • /
  • Pages.109-117
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  • 2005
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  • 1738-5261(pISSN)
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  • 2005-7172(eISSN)
한국해양학회 (The Korean Society of Oceanography)
권호 표지

Summer Pattern of Phytoplankton Distribution at a Station in Jangmok Bay

  • Lee, Won-Je (Department of Environmental Engineering, College of Engineering, Kyungnam University) ;
  • Shin, Kyoung-Soon (Southern Coastal Environment Research Division, South Sea Research Institute, KORDI) ;
  • Jang, Pung-Guk (Southern Coastal Environment Research Division, South Sea Research Institute, KORDI) ;
  • Jang, Min-Chul (Southern Coastal Environment Research Division, South Sea Research Institute, KORDI) ;
  • Park, Nam-Joo (Department of Environmental Engineering, College of Engineering, Kyungnam University)
  • 발행 : 2005.09.30
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초록

Daily changes in phytoplankton abundance and species composition were monitored from July to September 2003 (n=47) to understand which factors control the abundance at a station in Jangmok Bay. During the study, the phytoplankton community was mainly composed of small cell diatoms and dinoflagellates, and the dominant genera were Chaetoceros, Nitzschia, Skeletonema and Thalassionema. Phytoplankton abundance varied significantly from $6.40{\times}10^4$ to $1.22{\times}10^7$ cells/l. The initially high level of phytoplankton abundance was dominated by diatoms, but replacement by dinoflagellates started when the NIP ratio decreased to <5.0. On the basis of the N/P and Si/N ratios, the sampling periofd could be divided into two: an inorganic silicate limitation period (ISLP, $14^{th}$ $July-12^{th}$ of August) and an inorganic nitrogen limitation period (INLP, $13^{th}$ of August - the end of the study). Phosphate might not limit the growth of phytoplankton assemblages in the bay during the study period. This study suggests that phytoplankton abundance and species composition might be affected by the concentrations of inorganic nutrients (N and Si), and provides baseline information for further studies on plankton dynamics in Jangmok Bay.

키워드

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