海洋围隔生态系中浮游动物的研究

2002-05-20-26在东海进行小尺度船基浮游生物生态系围隔实验,研究浮游动物的群落结构、组成与环境之间的关系,探讨了优势种群的自然繁殖发育期。结果表明,浮游动物的种类组成较简单,优势种明显。浮游动物生物量、丰度及优势种群丰度三者的变化呈逐渐增加趋势。在实验期的1～5d,小拟哲水蚤的无节幼虫和早期幼体占绝对优势,该自然种群的丰度不断增加;随时间推移,无节幼虫逐渐发育为桡足幼体,而后又逐渐发育为成体。因此,本次实验期是实验海区优势种小拟哲水蚤种群的自然繁殖发育盛期。

Study on Zooplankton in a Marine Enclosure Ecosystem

An experiment on zooplankton in a small scale marine enclosure ecosystem was carried out on board in the East China Sea from 20 th to 26 th,May 2002 to study the community structure and composition,their relationship to the environment and to discuss natural reproduction and growth period of the dominant species.Results showed that the zooplanktonic community composition was of simplicity with its obviously dominant species.The variational tendencies of the temporal and spatial distributions of the zooplanktonic biomass,abundance and dominant population abundance were tend to be gradually increased.The nauplii and nonage larvae of Paracalanus parvus became dominant 1~5 days after experiment started,and the abundance of this natural population was increasing.Then the nauplii developed into copepodite larvae,and finally became the adults along with the time passed.Therefore,the experimental period was right the time of bloom for natural reproduction and growth of Paracalanus parvus in the experimental sea area.