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近五年来,在中国南黄海海域连续爆发了大规模的绿潮灾害。该论文主要针对采集自2010年绿潮中绿潮优势种藻体,结合分子生物学方法和主要形态特征进行研究。对样品ITS序列分析的结果表明,绿潮优势种为Ulva linza-procera-prolifera类群(LPP complex)。5S rDNA间隔区序列分析结果显示,样品中LPP类群的种类主要为Ulva prolifera,说明绿潮中最为主要的种类为Ulva prolifera。此外,在2010年绿潮的整个过程中,漂浮Ulva compressa一直存在,而且部分基本形态特征发生了改变。在绿潮中,Ulva compressa可以生长为气囊状而漂浮于海面,成为其他藻体的附着基质,从而有利于绿潮的迁移和扩大。尽管发生了形态变化,绿潮的主要种类是LPP和Ulva compressa,其中管状中空分枝繁多的Ulva prolifera是最为主要的。
In the recent five years, a large-scale green tide disaster broke out in the South Yellow Sea in China. This paper mainly focuses on the green algae species collected from the green tide in 2010, combining the methods of molecular biology and the main morphological characteristics. The results of ITS sequence analysis showed that the dominant species of green tide was Ulva linza-procera-prolifera (LPP complex). Sequence analysis of 5S rDNA spacer showed that the main species of LPP in this sample was Ulva prolifera, indicating that Ulva prolifera was the most dominant species in green tide. In addition, throughout the green tide of 2010, the floating Ulva compressa has been in existence and some of the basic morphological features have changed. In the green tide, Ulva compressa can grow into a balloon shape and float on the sea surface, becoming the attachment matrix of other algae, which is beneficial to the migration and expansion of green tide. Despite the morphological changes, the main types of green tide are LPP and Ulva compressa, among which Ulva prolifera with many tubular hollow branches is the most important.