한국해양환경ㆍ에너지학회지 (Journal of the Korean Society for Marine Environment & Energy)
- 제11권3호
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- Pages.113-123
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- 2008
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- 2288-0089(pISSN)
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- 2288-081X(eISSN)
Cochlodinium polykrikoides 적조의 최초발생해역인 나로도 주변 해역의 해양환경
Marine Environments in the Neighborhood of the Narodo as the First Outbreak Region of Cochlodinium polykrikoides Blooms
- Lee, Moon-Ock (Faculty of Marine Technology, Chonnam National University) ;
- Moon, Jin-Han (Department of Ocean Engineering, Graduate School, Chonnam National University)
- 발행 : 2008.08.25
초록
유독성 Cochlodinium polykrikoides 적조의 최초발생해역으로 알려져 있는 나로도 주변 해역의 해양환경적 특징을 조사하기 위해서 1992년부터 2007년까지 국립수산과학원이 실시한 해양환경측정망 자료 및 적조정보자료와 고흥지방의 기후자료 등을 분석하였다. Cochlodinium polykrikoides 적조는 8월에 나로도 주변 해역에서 최초로 발생한 경우가 가장 많았고, 그 발생시기는 해마다 빨라지고 있는 경향을 보였다. 또한 나로도 주변 해역에서의 표층 염분도 계속 증가하는 추세를 보여, Cochlodinium polykrikoides 적조 발생시기의 빨라짐과의 어떤 관련성을 시사하였다. 한편 나로도 주변 해역에서 Cochlodinium polykrikoides 적조가 최초로 발생할 때는 동일한 시기의 가막만 또는 진해만 해역에 비해 상대적으로 일사량은 많았고 강수량은 적었다. 8월의 나로도 주변 해역의 평균 수온 및 염분은 동일한 시기의 가막만 및 진해만에 비하여 평균 수온은
We have analyzed a long term data of marine environments, red tide information and meteorology acquired by NFRDI and KMA, in order to understand the characteristics of marine environments in the Narodo coastal waters which is known to be the first outbreak region of Cochlodinium polykrikoides blooms. During the period of from 1992 to 2007, Cochlodinium polykrikoides blooms have first occurred more often in August. However, the outbreak time of the blooms tended to be earlier annually, and in addition, the surface salinity also had a tendency to increase. Consequently, it suggested that there might be a relationship between the transition of the outbreak time of the blooms and salinity. On the other hand, insolation was relatively rich but precipitation was relatively scarce in Gohung Province, compared to Yeosu or Tongyeong, when Cochlodinium polykrikoides blooms first occur in Narodo coastal waters. Average water temperature and salinity in August in Narodo coastal waters were all higher than those in Gamak and Jinhae bays, suggesting that Narodo coastal waters are a region of relatively high water temperature and high salinity. Also, concentrations of nutrients and chlorophyll- a were significantly low than those in Jinhae Bay, which is known to be a eutrophicated region, while the overall water quality seemed to be similar to Gamak Bay. The results of PCA(Principal Component Analysis) proved that insolation and water temperature are the most important factors for the outbreak of Cochlodinium polykrikoides blooms in Narodo coastal waters while concentrations of COD and dissolved oxygen are secondly important. Furthermore, typhoons also appeared to be one of most important factors for the outbreak of Cochlodinium polykrikoides blooms.
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