Research on the carbon isotopic composition of organic matter from Lake Chenghai and Caohai Lake sediments

被引：12

作者：

Zhu Z. ^{[1
,2
,3
]}

Chen J. ^{[1
]}

Zeng Y. ^{[1
,4
]}

Li H. ^{[2
]}

Yan H. ^{[5
]}

Ren S. ^{[2
]}

机构：

[1] The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

[2] Chongqing Key Laboratory of Exogenic Minerallization and Mine Environment, Chongqing Institute of Geology and Mineral Resources

[3] Chongqing Research Center of State Key Laboratory of Coal Resources and Safe Mining

[4] Graduate School of Chinese Academy of Sciences

[5] College of Urban Planning and Environment Science, Xuchang University

来源：

Chinese Journal of Geochemistry | 2011年 / 30卷 / 1期

基金：

中国国家自然科学基金;

关键词：

δ[!sup]13[!/sup]C value; Lake Caohai; Lake Chenghai; organic matter; productivity;

D O I：

10.1007/s11631-011-0491-9

中图分类号：

学科分类号：

摘要：

The carbon isotopic composition of organic matter from lake sediments has been extensively used to infer variations in productivity. In this paper, based on the study of the contents and δ13C values of organic matter in different types of lakes, it has been found that δ13C values of organic matter have different responses to lake productivity in different lakes. As to the lakes dominated by aqutic macrophytes such as Lake Caohai, organic matter becomes enriched in 13C with increasing productivity. As to the lakes dominated by aquatic algae such as Lake Chenghai, δ13C values of organic matter decrease with increasing productivity, and the degradation of aquatic algae is the main factor leading to the decrease of δ13C values of organic matter with increasing productivity. Therefore, we should be cautious to use the carbon isotopic composition of organic matter to deduce lake productivity. © 2011 Science Press, Institute of Geochemistry, CAS and Springer Berlin Heidelberg.

引用

页码：107 / 113

页数：6

共 36 条

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