Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Spatio-temporal Distributions of Phytoplankton Community in the Coastal Waters of Central South Sea (CWoCSS), Korea

남해 중앙부 연안해역 식물플랑크톤 군집의 시·공간적 분포특성

  • Yoon, Yang Ho (Faculty of Marine Technology, Chonnam National University)
  • Received : 2016.09.07
  • Accepted : 2017.01.06
  • Published : 2017.01.31
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Abstract

This paper described the spatio-temporal distributions in the phytoplankton community, such as species composition, standing crops, and dominant species, from July 2012 to April 2013 in the Coastal Waters of Central South Sea (CWoCSS) of Korea. A total of 87 species of phytoplankton belonging to 52 genera were identified. In particular, diatoms and phytoflagellates comprised more than 62.1% and 37.9% of the total species, respectively. The phytoplankton cell density fluctuated with an annual mean of $7.9{\times}10^4cells{\cdot}L^{-1}$ between the lowest value of $1.0{\times}10^3cells{\cdot}L^{-1}$ in spring and the highest value of $4.5{\times}10^5cells{\cdot}L^{-1}$ in winter. The seasonal succession of the dominant species were Chaetoceros curvisetus, Ch. debilis in summer, Eucampia zodiacus in autumn, E. zodiacus, Thalassiosira curviseriata in winter and Skeletonema costatum -ls (like species), Leptocylindrus danicus in spring. According to principal component analysis, the phytoplankton community of the CWoCSS was characterized by the mixing rate between the freshwater inflow from Somjin River and the seawater of the South Sea, Korea.

남해 중앙부 연안해역에서 식물플랑크톤 군집의 시 공간적 분포특성을 파악하기 위하여 2012년 7월부터 2013년 4월까지 20개 정점의 표층과 저층(Bottom + 1m)에서 계절별 조사를 실시하였다. 출현한 식물플랑크톤은 52속 87종으로 규조류가 62.1%, 식물성 편모조류가 37.9%로서 여름에 69종으로 높고, 봄과 가을에 42종으로 낮았다. 현존량은 봄 $1.0{\times}10^3cells{\cdot}L^{-1}$에서 겨울에 $4.51{\times}10^5cells{\cdot}L^{-1}$의 범위로 연평균 $7.9{\times}10^4cells{\cdot}L^{-1}$로 낮았다. 최우점 및 차우점종은 여름 Chaetoceros curvisetus, Ch. debilis, 가을은 Eucampia zodiacus, 겨울은 E. zodiacus, Thalassiosira curviseriata 그리고 봄은 Skeletonema costatum -ls (like species), Leptocylindrus danicus었다. 우점종을 이용한 주성분분석에서 중심규조와 우상규조의 출현환경은 다른 것으로 나타났으며, 득점에 의한 해역구분은 전체적으로 남해중앙부에서는 서쪽해역인 여수해만 및 동산연안과 중앙부 개방해역이 서로 다른 환경특성을 나타내어, 남해 중앙부 연안해역은 섬진강에서 유출되는 담수 및 외해역에서 영향을 미치는 쓰시마난류, 중국대륙연안수 및 한국고유연안수에 의한 혼합수가 계절에 따라 세력을 달리하면서는 영향을 미치는 것으로 판단되었다.

Keywords

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