东海沉积物微生物标志物的年代际变化及来源分析

海洋地质与第四纪地质 Pub Date : 2013-01-14 DOI:10.3724/SP.J.1140.2012.03087

Ting Zhang, L. Xing, Hailong Zhang, Li Li, Xiaochen Zhao, Wei-fang Chen, Meixun Zhao

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引用次数: 2

摘要

甘油二烷基甘油四醚(GDGTs)是一类新发现的微生物生物标志物。基于GDGTs的代用物已成为揭示沉积有机质来源和古地温重建的重要指标。本研究对位于陆架区DH5-1站(29°28.118'N, 123°06.639'E，水深63.5 m)的岩心沉积物中总有机质含量和GDGTs通量进行了分析。利用δ13C、C/N和BIT指数重建了近150年来有机质来源的变化。结果表明，近百年来东亚冬季风的增强，加强了长江口陆源物质向陆架的搬运。然而，自20世纪80年代以来，人类活动的增加导致更多的营养物质流入，从而提高了海洋产量，降低了沉积物中陆生有机质的相对百分比。

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Decadal Changes and Sources Analysis of Microbial Biomarker Gdgts in the East China Sea Sediments

The Glycerol Dialkyl Glycerol Tetraethers(GDGTs) is a group of newly discovered microbial biomarkers.The proxies based on GDGTs have become important indicators for revealing the sources of sedimentary organic matters and reconstruction of paleotemperature.In this study,we analyzed the content of the total organic matters and the fluxes of GDGTs in the core sediments from the DH5-1 station(29°28.118′N、123°06.639′E,water depth 63.5 m) located at the shelf area.The changes of organic matter sources were reconstructed using δ13C,C/N and BIT indexes during the past about 150 years.The results indicated that the enhanced East Asian winter monsoon in the past century strengthened the transport of terrestrial material from the Yangtze River Estuary to the shelf area.However,since the 1980s,increased human activities caused more nutrients influx which elevated marine production and reduced the relative percentage of terrestrial organic matters in the sediments.

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来源期刊

海洋地质与第四纪地质

CiteScore

0.10

自引率

0.00%

发文量

4176

期刊介绍： Marine Geology and Quaternary Geology launched in 1981 is a bimonthly academic journal sponsored by Qingdao Institute of Marine Geology, China Geological Survey, and published by the Science Press, China.The journal aims to publish original, cutting-edge, and explorative scientific results in the field of marine geology and sea-land Quaternary geology. The journal focus on reporting the latest research achievements supported by National Natural Science Foundation Project, National Key Project and International Cooperation Project, with priority to the results in China seas, global ocean and three poles, and the comparative study results between offshore and land, regional and global scientific issues.