The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Temporal Variations and Species Composition of Planktonic Tintinnids (Protist, Ciliophora) in the Korea Strait

대한해협에서 유종섬모충류의 종조성과 시간적 변동

  • Han, Gook-Bo (KORDI South Sea Institute) ;
  • Lee, Won-Je (Department of Environmental Engineering, Kyoungnam University)
  • 한국보 (한국해양연구원 남해연구소) ;
  • 이원제 (경남대학교 환경공학과)
  • Received : 2010.09.14
  • Accepted : 2010.10.18
  • Published : 2010.11.30
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Abstract

In order to understand the temporal variations and species composition of tintinnids, at two stations of the Korea Strait, this study was carried out from January to December 2007 (n=17). Fifty-one species from 22 genera were encountered: 27 neritic species (9 genera) and 24 oceanic species (14 genera). The species composition was different between two stations, and neritic species frequently appeared at St. 1, while oceanic species more frequently appeared at St. 2. According to the frequency in appearance of species, the most dominant species were neritic species such as Stenosemella nivalis and S. pacifica, that appeared in all seasons. Also, Acanthostomella norvegica, Amphorellopsis acuta, Epilpocyloides ralumensis, Protorhabdonella curta and other many oceanic species appeared intensively during the low salinity (${\leqq}33\;psu$) and high water temperature (${\geqq}24^{\circ}C$) period (July~October). The abundance of tintinnids ranged from 0 to 1,845 cells $L^{-1}$. It was higher in the seasons (summer and autumn) of low salinity and high water temperature than in other seasons. The abundance was relatively higher at St. 1 than at St. 2. On the basis of correlation and multiple regression analyses, the tintinnid abundance was not correlated with chi-a, but significantly correlated with water temperature and salinity, suggesting to be the primary abiotic factors influencing the abundance. This study suggests that the complex hydrographic conditions of the study area might influence the temporal distribution and species composition of tintinnids.

본 연구는 대한해협에서 유종섬모충류의 종조성과 시간적 변동 양상을 파악하기 위하여 2007년 1월부터 12월까지 2개 정점에서 17회에 걸쳐서 수행되었다. 조사기간 동안 출현한 유종섬모충류는 총 22속 51종으로 연안종과 외양종은 각각 9속 27종과 14속 24종이 관찰되었으며 정점 간 종조성의 차이가 있었다. 정점 1에서는 연안종의 출현이 우세하였던 반면에 정점 2에서는 외양종이 우세하였다. 계절별로 동계와 춘계에는 연안종이, 하계와 추계에는 외양종이 비교적 많이 출현하였다. 출현빈도에 따른 최우점종인 Stenosemella nivalis와 S. pacifica은 연안종으로써 전 조사기간에 걸쳐서 출현하였으며, Acanthostomella norvegica, Amphorellopsis acuta, Epilpocyloides ralumensis, Protorhabdonella curta 등 많은 외양종들은 33 psu 이하 저염기와 $24^{\circ}C$ 이상 고수온기인 7월~10월에 집중적으로 출현하였다. 유종섬모충류의 현존량은 0~1,845 cells $L^{-1}$의 범위를 보였으며, 저염 및 고수온기인 하계와 추계에 높은 현존량을 보였고 정점 l에서 정점 2에 비해 높았다. 직접상관분석 및 다중회귀분석결과, 유종섬모충류(특히, 외양종)는 전반적으로 식물플랑크톤(엽록소-a) 보다는 수온 및 염분과 유의성 있는 상관성을 보였으며, 수온과 염분이 현존량 분포에 영향을 주는 중요한 환경요인임을 암시하였다. 본 연구결과 연구해역의 복잡한 해황이 유종섬모충류 현존량 및 종 조성 분포에 중요한 영향을 주었던 것으로 판단된다.

Keywords

Acknowledgement

Supported by : 한국해양연구원

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