舟山群岛海洋沉积物中脂类生物标志物特征及物源解析

为研究舟山海域表层沉积物的有机质来源和浮游植物群落结构，利用气相色谱-质谱联用（GC-MS）和超高效液相色谱-质谱联用（UPLC-MS）分别对岱山、衡山和嵊泗3个岛屿附近的23个站点的表层海洋沉积物中的非极性脂和极性膜脂进行分析。结果显示舟山沉积物中舟山沉积物的有机质来源主要有陆源输入和海源输入，其中陆源输入为60%左右，海洋输入为40%左右。舟山沉积物中的陆源正构烷烃与海源正构烷烃之比（∑T/∑M）值在0.54~2.73之间，高∑T/∑M值区域靠近杭州湾，低∑T/∑M值区域靠近东海近岸海域。与长江口区域相比，舟山沉积物受到的陆源输入影响较小，但远远高于东海赤潮区域。沉积物中的磷脂酰甘油含量较高，脂酰乙醇胺和磷脂酰肌醇含量较低，脂肪酸参数∑C₁₆/∑C₁₈在1附近。这说明舟山沉积物中的主要浮游植物是微藻，但甲藻和硅藻无各自优势。

Characteristics and provenance analysis of lipid biomarkers in marine sediments of Zhoushan islands

In order to study the origin of organic matter and phytoplankton community structure of marine sediments in Zhoushan, the non-polar matter and intact phospholipids composition in the sediment cores at 23 sites of the Daishan, Hengshan and Shengsi islands was examined by GC-MS and UPLC-MS. The study showed that the sediments organic material in the Zhoushan was derived from both terrestrial plants and marine organism, of which terrestrial inputs were about 60% and marine inputs were about 40%. The range of the ratio of high to low carbon hydrocarbon (∑T/∑M) was between 0.54 and 2.73, and the high ∑T/∑M value area was close to Hangzhou bay, the low ∑T/∑M value area was near the coastal of the East China sea. Compared with the Yangtze estuary area, Zhoushan sediment was less affected by terrestrial input, but much higher than the tide-frequent-occurrence area in the East China Sea. The content of Phosphatidylglycerol in sediments was higher than the Phosphatidylethanolamine and Phosphatidylinositol, the fatty acid parameter ∑C₁₆/∑C₁₈ was near 1. These results indicated that the main Phytoplankton in the sediments of Zhoushan was microalgae, and dinoflagellates and diatoms had no special advantages.