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山东半岛东北岸近海是黄河入海泥沙向外输送的主要通道和重要沉淀区,探讨该海域沉积物中木质素的分布特征和有机物来源,对理解其中记录的环境演变信息具有重要意义。本文通过分析该海域表层沉积物中总有机碳(TOC)、总氮(TN)、碳稳定同位素(δ13 C),并结合木质素及其特征参数,研究了其中有机物的来源,以及木质素的分布、植被来源和降解程度。结果表明,海源有机物是山东半岛东北岸近海表层沉积物中有机物的主要来源,有机物的分布特征受河流输入和海洋环流的共同影响。被子植物草本和木本组织是木质素的主要植被来源,酸醛比值表明表层沉积物中木质素都经历了较高程度的降解。
The offshore of the northeastern coast of Shandong Peninsula is the main channel and an important sedimentation area for sediment transport from the Yellow River into the sea. It is of great significance to understand the distribution of lignin and the sources of organic matter in the sediments. In this paper, by analyzing the total organic carbon (TOC), total nitrogen (TN) and carbon stable isotope (δ13 C) in the surface sediments of the area, combined with lignin and its characteristic parameters, the origin of organic matter and the content of lignin Distribution, source of vegetation and degree of degradation. The results show that the marine organic matter is the main source of organic matter in the coastal surface sediments on the northeastern coast of Shandong Peninsula. The distribution of organic matter is affected by both the input of the river and the ocean circulation. Angiosperm herbs and woody tissue are the main sources of lignin, and the ratio of acid to aldehyde indicates that the lignin in surface sediments has undergone a higher degree of degradation.