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Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China
Dandan Duan;  Dainan Zhang;  Yu Yang;  Jingfu Wang;  Jing'an Chen;  Yong Ran
2017
Source PublicationBiogeosciences
Volume14Issue:18Pages:4009-4022
Abstract

Neutral monosaccharides, algal organic matter (AOM), and carbon stable isotope ratios in three sediment cores of various trophic reservoirs in South China were determined by high-performance anion-exchange chromatography, Rock-Eval pyrolysis, and Finnigan Delta Plus XL mass spectrometry, respectively. The carbon isotopic compositions were corrected for the Suess effect. The concentrations of total neutral carbohydrates (TCHO) range from 0.51 to 6.4 mg g(-1) at mesotrophic reservoirs, and from 0.83 to 2.56 mg g(-1) at an oligotrophic reservoir. Monosaccharide compositions and diagnostic parameters indicate a predominant contribution of phytoplankton in each of the three cores, which is consistent with the results inferred from the corrected carbon isotopic data and C/N ratios. The sedimentary neutral carbohydrates are likely to be structural polysaccharides and/or preserved in sediment minerals, which are resistant to degradation in the sediments. Moreover, the monosaccharide contents are highly related to the carbon isotopic data, algal productivity estimated from the hydrogen index, and increasing mean air temperature during the past 60 years. The nutrient input, however, is not a key factor affecting the primary productivity in the three reservoirs. The above evidence demonstrates that some of the resistant monosaccharides have been significantly elevated by climate change, even in low-latitude regions.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8046
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 55002, China
Recommended Citation
GB/T 7714
Dandan Duan;Dainan Zhang;Yu Yang;Jingfu Wang;Jing'an Chen;Yong Ran. Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China[J]. Biogeosciences,2017,14(18):4009-4022.
APA Dandan Duan;Dainan Zhang;Yu Yang;Jingfu Wang;Jing'an Chen;Yong Ran.(2017).Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China.Biogeosciences,14(18),4009-4022.
MLA Dandan Duan;Dainan Zhang;Yu Yang;Jingfu Wang;Jing'an Chen;Yong Ran."Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China".Biogeosciences 14.18(2017):4009-4022.
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