中文摘要：

作为一种新的地球化学指标方法，多参数生物标志物法已被广泛应用于重建浮游植物生产力及群落结构。本文对北黄海-渤海表层沉积物中浮游植物生物标志物的分布进行了研究。通过对北黄海-渤海60个站位的调查研究发现，硅藻、甲藻和颗石藻这3种浮游植物的生物标志物含量高值区主要分布在泥质区，同TOC的分布模式类似。为了消除粒度和沉积速率对含量的影响，将这3种生物标志物含量分别与TOC做比值，结果发现相对含量高值区与高生产力区相对应。以这3种生物标志物的相对比例来分别指示浮游植物在北黄海-渤海的相对贡献变化，结果表明近岸区硅藻相对贡献高，这主要与硅藻在高浓度硅的情况下具有竞争优势有关；而由于对营养盐的竞争关系，甲藻相对贡献高值区处于远岸区。在北黄海中部发现高的颗石藻相对贡献，与黄海暖流入侵路径相对应。

英文摘要：

Multi-biomarkers have been widely used to reconstruct phytoplankton productivity and community structure. In this paper, phytoplankton biomarkers for diatoms, dinoflagellates and haptophytes were measured to study their distributions in surface sediments from the North Yellow Sea and the Bohai Sea. High values of the phytoplankton biomarkers contents were observed in the mud areas, consistent with TOC distribution. Biomarker contents were normalized to TOC to eliminate the influences of grain size and sedimentation rate. High values of normalized biomarker contents were found in high primary productivity areas. Additionally, the relative ratios of phytoplankton biomarkers were used to indicate the relative contributions of diatoms, dinoflagellates and haptophytes in the North Yellow Sea and the Bohai Sea. The result srevealed that high contribution of diatoms occurred in coastal areas, where abundant silicate can favor diatoms growth. However, high contribution of dinoflagellates was found in the middle of the studied are a, related to the competition between diatoms and dinoflagellates. In the middle of the North Yellow Sea, high contribution of haptophytes was observed, corresponding to the intrusion path of the Yellow Sea Warm Current.