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Outbreak of Red Tides in the Coastal Waters off the Southern Saemankeum areas, Jeonbuk, Korea 1. Temporal and Spatial Variations in the Phytoplankton Community in the Summer-fall of 1999  

유영두 (군산대학교 해양과학대학 해양정보과학과)
정해진 (군산대학교 해양과학대학 해양정보과학과)
심재형 (서울대학교 자연과학대학 지구환경과학부)
박재연 (서울대학교 자연과학대학 지구환경과학부)
이경재 (서울대학교 자연과학대학 지구환경과학부)
이원호 (군산대학교 해양과학대학 해양정보과학과)
권효근 (군산대학교 해양과학대학 해양정보과학과)
배세진 (한국해양연구원 해양환경·기후연구본부)
박종규 (인제대학교 환경공학과)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.7, no.3, 2002 , pp. 129-139 More about this Journal
Abstract
We investigated the outbreak of red tides dominated by harmful dinoflagellates from August to November 1999 in the coastal waters off the southern Saemankeum areas where a huge red tide dominated by Cochlodinium polykrikoides had been first observed in 1998. We took water samples from 2~5 depths of 4 stations (with 3-4 additional stations during red tides) in this study period and then measured the abundance of phytoplankton, water temperature, salinity, and the concentrations of nutrients. In the study period harmful dinoflagellates Alexandrium tamarense, C. polykrikoides, Gymnodnium catenatum, Gyrodinium aureolum, Gymnodnium impudicum were present, and of these G. aureolum and C. polykrikoides formed red tide patches on September 16 and October 18, respectively. The date of the outbreak of red tide dominated by C. polykrikoides in the study area was approximately 50 days later than that off the Kohung areas in 1997 and the surface water temperature when the red tides outbroke in the former area was 6$^{\circ}C$ lower than that fur the latter area. The maximum abundance of C. polykrikoides on September 16, October 7 and 18 were 5, 14, and 463 cells $m\ell$$^{-1}$ , respectively. The growth rate of C. polykrikoides, isolated from the study area, was 0.3~0.4 d$^{-1}$ at 20~$25^{\circ}C$, which enable this species to reach the maximum concentration without being transported from the adjacent waters containing already made red tide patches. The outbreaks of red tides dominated by C. polykrikoides in the study area and off Kohung have occurred when and/or where the concentrations of diatoms were low. This evidence suggests that the outbreak of red tides dominated by C. polykrikoides is adversely affected by the high diatom concentrations or the conditions favorable for the growth of diatoms.
Keywords
Cochlodinium polykrikoides; Diatom; Dinoflagellate; Harmful algal bloom; Nurients; Salinity; Temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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