渤海水域初级生产力10年间的变化

The Fluctuations of Primary Productivity in Bohai Sea Waters Over Ten Years

根据 1982～1983 年和 1992～1993 年对渤海水域生产力调查资料的分析对比,探讨了渤海水域浮游植物现存量(叶绿素 a)及其初级生产力 10a 间的变化, 发现叶绿素 a 由105m g／m 3 减少到 061m g／m 3 ,初级生产力由 312m g／m 2d 下降到 216m g／m 2d,下降的幅度大约为(30～40)×10－ 2 ．但叶绿素 a 与初级生产力的空间分布与季节变化特征基本一致。

Based on the two sets of the data on primary productivity in Bohai Sea water respectivily over the periods of 1982～1983 and 1992～1993, the fluctuations of primary productivity and the biomass of phytoplankton(chlorophyll a) in this area over the ten years revealed that chlorophyll a reduced from 1 05 mg/m 3 to 0 61mg/m 3, primary productivity decreased from 312 mg/(m 2·d) to 216mg/(m 2·d) and the rate of decrease was about (30～40)×10 -2 . The features of spacial distribution and seasonal fluctuation pattern were about the same for both chlorophyll a and primary productivity.