Lee Young Sik
South Sea Fisheries Research Institute, Division of Water Environment, 347 Anpo Hayang, Yosu Jeonnam 556-820, South Korea.
Mar Pollut Bull. 2006 Oct;52(10):1249-59. doi: 10.1016/j.marpolbul.2006.02.024. Epub 2006 Mar 10.
Red tides caused by the dinoflagellate Cochlodinium polykrikoides occur annually in coastal waters of Korea, causing significant damage. A distinguishing characteristic of C. polykrikoides red tides is that they develop and persist in the open sea, where the water is comparatively clean with little contamination from the shore. We examined the causes of and key nutrients involved in high-density C. polykrikoides red tide outbreaks in the coastal seawaters around Yeosu and Tongyeong, Korea. High-density C. polykrikoides red tides occur in the coastal areas of Geomo Island, where freshwater flows into the sea after heavy rainfall events. Red tides are widespread in years when rainfall is heavy. The maximum concentration of C. polykrikoides and the duration of the red tides increase with increasing rainfall. Adding nitrogen and Seomjin River water to cultures of C. polykrikoides also increases biomass production and cell density of C. polykrikoides remarkably increased after heavy rainfall events. The occurrence of high concentrations of C. polykrikoides along the shores of Yeosu and Tongyeong seems to result from rainfall-initiated inflows of high concentrations of nitrate secondarily, after a conducive physical and chemical open-water environment has been established for C. polykrikoides to spread initially.
由多环旋沟藻（Cochlodinium polykrikoides）引起的赤潮每年都会在韩国沿海水域发生，造成重大损失。多环旋沟藻赤潮的一个显著特征是它们在公海形成并持续存在，那里的海水相对清洁，受海岸污染较少。我们研究了韩国丽水和统营周围沿海水域高密度多环旋沟藻赤潮爆发的原因及关键营养物质。高密度多环旋沟藻赤潮发生在巨磨岛沿海地区，在暴雨事件后有淡水流入大海。在降雨量大的年份，赤潮分布广泛。多环旋沟藻的最大浓度和赤潮持续时间随降雨量增加而增加。向多环旋沟藻培养物中添加氮和蟾津江水也会显著增加生物量产量，暴雨事件后多环旋沟藻的细胞密度也显著增加。丽水和统营沿岸出现高浓度多环旋沟藻似乎是由于降雨引发高浓度硝酸盐的流入，其次是在为多环旋沟藻最初扩散建立了有利的物理和化学开放水域环境之后。
