Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Mesozooplankton Community Focusing on the Copepods in the Bulgap Stream, Yeonggwang, Korea

영광 불갑천에 서식하는 요각류를 중심으로 한 중형동물플랑크톤의 군집구조

  • Lee, Dong-Ju (Department of Life Science, Hanyang University) ;
  • Lim, Dong-Il (Department of Real Estate, Hanyang Cyber University) ;
  • Kwak, Inn-Sil (Division of Marine Technology, Chonnam National University) ;
  • Soh, Ho-Young (Division of Marine Technology, Chonnam National University) ;
  • Lee, Won-Choel (Department of Life Science, Hanyang University)
  • Published : 2008.11.30
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Abstract

The composition and abundance of mesozooplankton were studied from the five stations on the Bulgap stream near Yeonggwang, Jeollanamdo, Korea. Mesozooplankton samples were collected bimonthly in April, July, August, October, and December 2006 and February 2007. Total 44 taxa of mesozooplankton occurred with the highest abundance (31$\sim$53,230 indiv. m$^{-3}$) in October, and the fewest (16$\sim$97 indiv. m$^{-3}$) in December. Diversity index is the highest in July (1.072) and the lowest in October (0.386). The two copepod species, Pseudodiaptomus inopinus and Macrocyclops albidus were dominant during the study periods. A brackishwater species, P. inopinus occurred in the Bulgap stream during from August 2006 to February 2007. This species was the most dominant species (53,010 indiv. m$^{-3}$) in the stations that usually have low salinities (0.1$\sim$14.0 psu). M. albidus was predominated during from April to August 2006 in the freshwater stations.

전라남도 영광군 불갑천에 서식하는 동물 플랑크톤을 2006년 4월, 7월, 8월, 10월, 12월, 2007년 2월 6회에 걸쳐 총 5개의 정점에서 채집을 실시하였다 조사기간 동안 출현한 동물플랑크톤은 44개의 분류군이 나타났으며, 우점한 분류군은 요각류였다. 10월에는 31$\sim$53,230 indiv. m$^{-3}$로 조사기간 동안 최고의 정점간 출현 개체수를 보였고, 12월에는 16$\sim$97 indiv. m$^{-3}$로 출현한 개체수가 최소로 나타나 시 공간적인 변동을 보였다. 종 다양성 지수는 7월(1.072)이 가장 높게 나타났으며, 10월(0.386)이 가장 낮게 나타났다. 우점적으로 출현한 요각류는Psdudodiaptomus inopinus와 Macrocyclops albidus였다. 담수와 기수에 서식하는 P. inopinus는 2006년 8월$\sim$2007년 2월에 걸쳐 모든 정점에서 출현하였으며, 불갑천 지역에서 극우점하였다. 약 20$^{\circ}C$에서 가장 많은 개체수를 나타내며, 저염도(0.1$\sim$14.0 psu)에서 높은 개체수를 보이고, 고염도(16.9$\sim$24.0 psu)에서는 낮은 개체수만이 출현하는 것으로 보아 염분도에 따라 분포를 달리하였다. M. albidus는 2006년 4$\sim$8월에서 담수 지역에서만 출현하였고, 수온이 높아짐에 따라 적은 개체수가 출현하였다.

Keywords

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