中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A comparison of n-alkane contents in sediments of five lakes from contrasting environments

文献类型:期刊论文

作者Zhang, Yongdong; Yu, Jinlei; Su, Yaling; Du, Yingxun; Liu, Zhengwen
刊名ORGANIC GEOCHEMISTRY
出版日期2020
卷号139
英文摘要In paleolimnology studies, the trajectories of n-alkane abundances and distributions in dated sediments are widely used indicators of changing environmental and ecological status in the overlying water over time. However, the factors contributing to the variable n-alkane profiles of lake systems are not yet fully understood. Here, a comparative study was conducted to examine natural and anthropogenic influences on the sediment n-alkane profiles of five representative lakes in China. Core samples from the deep oligomesotrophic lakes Fuxian and Lugu (FX-1 and LG-1 cores), the shallow eutrophic lakes Taibai and Changdang (TB-1 and CD-1 cores) and the alpine Lake Heihai (HH-1 core) were used. While there were striking differences in n-alkane abundances and distributions between the cores, the results suggested that the n-alkanes in all five studied lakes were derived mainly from biogenic sources, rather than from petroleum contamination. The short-chain (C-21 n-alkane profiles of different cores varied significantly. Abundances of long-chain n-alkanes (C-29, C-31 and C-33) in HH-1 were approximately 3-7 times greater than in other cores. Coupled with the lowest Paq (average 0.29) values recorded in the study, this indicates a predominantly terrestrial plant origin for the >C-21 n-alkanes, most likely the dense alpine meadow which surrounds the lake. In other cores, however, aquatic macrophytes appear to be more important contributors of the n-alkanes, a result that corresponds with the relatively low density of terrestrial plants in those catchments. (C) 2019 Elsevier Ltd. All rights reserved.
源URL[http://159.226.73.51/handle/332005/19918]  
专题中国科学院南京地理与湖泊研究所
推荐引用方式
GB/T 7714
Zhang, Yongdong,Yu, Jinlei,Su, Yaling,et al. A comparison of n-alkane contents in sediments of five lakes from contrasting environments[J]. ORGANIC GEOCHEMISTRY,2020,139.
APA Zhang, Yongdong,Yu, Jinlei,Su, Yaling,Du, Yingxun,&Liu, Zhengwen.(2020).A comparison of n-alkane contents in sediments of five lakes from contrasting environments.ORGANIC GEOCHEMISTRY,139.
MLA Zhang, Yongdong,et al."A comparison of n-alkane contents in sediments of five lakes from contrasting environments".ORGANIC GEOCHEMISTRY 139(2020).

入库方式: OAI收割

来源:南京地理与湖泊研究所

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