海洋科学2016，Vol.40Issue(2)：55-64,10.DOI:10.11759/hykx20140214001
黄河下游-河口-邻近海域表层沉积物中木质素的特征及其示踪意义
Characteristics and environmental implications of lignin in surface sediments from the lower Yellow River-Estuary- adjacent sea
摘要
Abstract
Buried terrestrial organic carbon on continental shelves plays an important role in the global carbon cycle. To better constrain the characteristics and distributions of terrestrial organic carbon in the Yellow River Estuary and adjacent Bohai Sea, in this study, we analyzed surface-sediment lignin phenols combined with TOC%, TN%, andδ13C. A cross-plot of S/V and C/V indicates that lignin is mainly derived from non-woody angiosperm tissues. The (Ad/Al)V values are between 0.31 and 1.01, with an average of 0.53, indicating a high degree of lignin degradation. A three-end-member (vascular plant, soil organic matter, and aquatic organisms) mixing model based onδ13C andΛ8 reveals that the relative amount of aquatic organisms, soil organic matter, and terrestrial plants is 32.8%, 59.9%, and 7.3%, respectively. The substantially greater contribution of soil organic matter than terrestrial plants is attrib-uted to the severe soil erosion and sparse vegetation cover in the Chinese loess plateau—a major source of the Yel-low River sediments.关键词
黄河河口/木质素/陆源有机碳Key words
the Yellow River Estuary/lignin/terrestrial organic carbon分类
海洋科学引用本文复制引用
王映辉,许云平..黄河下游-河口-邻近海域表层沉积物中木质素的特征及其示踪意义[J].海洋科学,2016,40(2):55-64,10.基金项目
国家自然科学基金项目(41476062)@@@@ National Natural Science Foundation of China, No.41476062。 （41476062）
