灾害性水母生消中的化感物质及其作用研究

全球海洋中水母的数量近年来呈明显增加趋势，水母大规模暴发已成为继有害赤潮之后最大的海洋生态灾害，探明其发生消亡机制是当今海洋科学面临的重大科学问题。化感物质在海洋生态系统运转中起着非常重要的作用，但这些物质在水母生消中的作用至今未能探明。本项目拟通过实验室模拟和外海调查相结合，建立海水中化感物质分离流程和分析鉴定方法，查明黄东海水母释放特征化感物质的时空变化、化感物质与生态环境的耦合响应、化感物质与水母爆发消亡的对应关系，重点聚焦于水母所释放化特征感物质对浮游植物的影响，研究水母所释放的特征化感物质对浮游植物的促进/抑制作用,阐明影响水母释放特征化感物质的控制性因素，为系统揭示水母爆发消亡机制提供科学依据。

In recent years, the number of jellyfish increased clearly in the global oceans and jellyfish bloom has become the greatest marine ecological disaster following the harmful algal blooms. The mechanism of jellyfish bloom is one of the most important issues of the marine sciences research at present. Allelochemicals plays a very important role in the marine ecosystem, but its function in jellyfish bloom has not been proven. The project will use a combined tactics of wild investigation and laboratory culture,and establish the separation processes and identification methods of allelochemicals in seawater, and study the temporal and spatial variation of the characteristic allelochemicals released by jiellyfish, the effect of coupling between the allelochemicals and ecological environment, corresponding relation between allelochemicals and jellyfish bloom in the Yellow Sea and the East China Sea. The focal point of this studing is on the effection of allelochemicals released by jellyfish on phytoplankton. Based on the researching of the promotion or inhibition of allelochemicals on phytoplanktons and the finding on the main factors for influencing the allelochemicals release from jellyfish, this work will provide the basic data for revealing the mechanism of jellyfish bloom eventually.