渤海初级生产力的若干理化影响因子初步分析

A Preliminary Study on Factors Affecting the Primary Production in the Bohai Sea

根据文献资料分析了辐射、温度、透明度和营养盐浓度等影响渤海初级生产力的主要理化因素 ,定量给出了它们的相关程度。这些因子与初级生产力之间的线性相关系数约为 0 .5～ 0 .8,且以透明度与初级生产力的相关性最好。然后利用一个简单的海洋生态系统动力学模式 ,进一步讨论了物理和化学强迫对渤海初级生产力的影响。物理和化学环境的改变不仅能影响初级生产力的大小 ,也决定了其时间变化特征。

Based on the data collected from the field observations, the main factors affecting the primary production in the Bohai Sea are analyzed, and they are water transparency, temperature, concentrations of nutrient and incident radiation. The linear correlation coefficients between these factors and primary production are about 0.5 to 0.8 while the correlation coefficient of transparency and primary production is the largest. Then a simple NPZD biological model is used to study the roles of physical and chemical factors (transparency, temperature, incident radiation and the concentrations of nutrient) in the primary production. It is shown that physical and chemical factors may change the primary production in the Bohai Sea and control its monthly variation.