大亚湾海域浮游动物生物量变化特征

通过对1982-2005年在大亚湾海域开展的27个航次的浮游动物调查资料,对该海域浮游动物生物量的变化情况进行了初步的分析研究。结果表明:春、秋两季是大亚湾生物量较低的季节,目前大亚湾浮游动物生产力水平达到历史最高水平。但大亚湾海域生态环境的改变已经对浮游动物产生了巨大的影响,主要表现在以下方面:浮游动物湿重生物量的季节变化由原来的双峰型变为单峰型,生物量高峰出现时间有明显的推移;季节变化的幅度日趋加剧;生物量密集中心有向湾外逐渐推移的趋势。

The variety of zooplankton biomass in Daya Bay

In order to understand the effect of environment on biology in Daya Bay. The data of zooplankton was studied gathered by 27 ecological survey cruises carried out in this area from 1982 to 2005 . After the preliminary analysis of the variety of zooplankton biomass, the following results were given. The zooplankton biomass is low in spring and autumn, and is high in the alongshore area of Daya Bay.The productivity of zooplankton is the highest than ever. It can be seen that the change of entironment has taken the great influence to zooplankton in the bay. From 1985 to 2004, the tendency of seasonal variety of zooplankton biomass transformed from the type of double peaks to single peak. The occurring time of biomass peak moved obviously. The range of seasonal variety is more this year than past year. In the bay,the location of high biomass area was changed.The high biomass area show the trend of moving to out region of the bay.