三门湾秋季浮游植物现存量和初级生产力

Primary production and standing stock of the phytoplankton in the Sanmenwan Bay during the autumn

对1987年9月浙江三门湾海区浮游植物细胞丰度、叶绿素a浓度和初级生产力的分布特征及其与环境的关系进行了研究。结果表明,调查海区的浮游植物细胞丰度、叶绿素a浓度和初级生产力均具有明显的空间区域性分布特征。叶绿素a浓度高值区位于三门湾顶部和健跳港口,从湾顶部往湾口海区方向,叶绿素a浓度逐渐下降。初级生产力的分布趋势与叶绿素a浓度的分布趋势一致。表层水浮游植物平均细胞丰度为(3.36±1.39)×103个/dm3,表、底层平均叶绿素a浓度分别为(1.47±0.42)μg/dm3和(1.12±0.19)μg/dm3,平均初级生产力为(36.0±29.5)mg/(m2·d)。

The observation on the cell abundance, chlorophyll \%a\% concentration and productivity of phytoplankton were carried out in the Sanmenwan Bay during the autumn of 1987. The results show that there is obvious regional distribution in the Sanmenwan Bay. There are higher concentrations of chlorophyll \%a\% in the area of Jiantiao Harbor than that other region in the bay. Chlorophyll \%a\% concentration decreases slowly from the top to the mouth of the bay.A distributional characteristic of the primary production is similar to that of chlorophyll \%a\% concentration. The average cell abundance of phytoplankton is (336±139)×10\+3 cells/dm\+3 in the surface water of the survey area. The surface and botton water average chlorophyll \%a\% are (147±042)μg/dm\+3 and (112±019)μg/dm\+3 respectively. Primary production average is (360±295)mg/(m\+2·d).