米氏凯伦藻分布及其引发赤潮的发生规律研究

近年来米氏凯伦藻赤潮引发的赤潮频率逐渐增加、规模不断扩大,引起了广泛关注,但其来源及扩散方式尚不明确。本研究在分析国内外文献资料的基础上,从米氏凯伦藻的生物学特征、发现历史和引发赤潮、与环境条件关系等多各角度,阐述了米氏凯伦藻的分布和发生规律。结果显示米氏凯伦藻为我国海域外来藻种,其源头为日本,传播路径可能以传播压舱水的形式由日本或由日本经由欧美传入我国。该藻种引发的有毒赤潮事件20世纪60年代起在日本最早出现,而我国于1998年才首次出现,随后呈由南向北的扩散趋势,目前浙江和福建海域是米氏凯伦藻赤潮的主要发生区域。米氏凯伦藻赤潮的发生可能与光照、温度和富营养化等有关。

Distribution of Kareniamikimotoi and rules of its causing red tide

Caused by Kareniamikimotoi red tide bloom frequency had increased and expanded gradually, had attracted wide atten- tion, but its origin and diffusion is not clear in recent years. In this study, the law of Kareniamikimotoi ＂s distribution and occur- rence had been illustrated based on its biological characteristics, found in history and the relationship with environmental factors through the analysis of literature data. The results showed that Kareniamikimotoi is alien algal species for China waters. And Japan was thought to be its origin, the propagation path may be provided by Japan or from Japan into China via Europethrough ballast water carried. These algae species bloomed as harmful al- gae red tide since the 1960s and f＇ast appeared in Japan, while it was frrst bloomed in China in 1998, and then, the tendency to spread from south to north. So far from Zhejiang to Fujian waters are the mainly region of Kareniamikimotoi bloom. Karenia algal blooms may occur with light, temperature and eutrophication and