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题名: Total organic carbon and its environmental significance for the surface sediments in groundwater recharged lakes from the Badain Jaran Desert, northwest China
作者: Dong, SP; Li, ZL; Chen, QJ; Wei, ZQ
收录类别: SCIE
出版日期: 2018
刊名: JOURNAL OF LIMNOLOGY
卷号: 77, 期号:9, 页码:121-129
出版者: PAGEPRESS PUBL
出版地: PAVIA
英文摘要: Total organic carbon (TOC) content in lake sediments is typically used for the reconstruction of paleoenvironments. It remains uncertain, however, whether these sediment variables in lakes supplied by groundwater in the hinterland of the Badain Jaran Desert are applicable. Moreover, it is still uncertain whether the TOC content in these lakes can be used as a proxy to identify past climatic change and environmental evolution studies. In this study, the spatial distributions of the TOC contents and C/N ratios were analyzed for 109 surface sediment samples collected from five lakes without runoff recharge. The results revealed that the TOC content of the lake surface sediments was extremely low (0.03% -1.01%) and consisted of both allochthonous organic matter carried by wind, as well as autochthonous organic matter generated in the lakes. Within a lake, spatial differences in the amount of TOC found in surface sediments may be caused by several processes including bathymetry topography and wind-induced wave activity. In addition. wind-induced wave activity produces a higher TOC content, which is more pronounced in larger lakes (>0.21 km(2)) with longer fetches, By contrast, in smaller lakes, organic matter accumulates in the deeper waters, but can be affected by many factors. It is therefore necessary to consider lake area when applying the TOC content of lake sediments for the reconstruction of a paleolake evolution. Furthermore, because the TOC content of lake sediments in hyper-arid regions is extremely low, and the organic matter may have multiple and varied sources, a single proxy (TOC) cannot he used to reconstruct lake evolution.
关键词: Lake evolution ; total organic carbon ; paleoenviroment reconstruction ; Badain Jaran Desert ; arid region
作者部门: [Dong, Shipei ; Li, Zhuolun ; Chen, Qiujie ; Wei, Zhiqiao] Lanzhou Univ, Coll Earth & Environm Sci, Ctr Desert & Arid Reg Res, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Li, ZL (reprint author), Lanzhou Univ, Coll Earth & Environm Sci, Ctr Desert & Arid Reg Res, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Marine & Freshwater Biology
文章类型: Article
所属项目编号: national natural Science Foundation of China [41530745, 41771211] ; Fundamental Research Funds for the Central Universities [lzujbky-2017-215, lzujbky-2017-it104]
所属项目名称: 国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; LZU
语种: 英语
DOI: 10.4081/jlimnol.2017.1667
ISSN号: 1129-5767
WOS记录号: WOS:000432877400010
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/196024
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Dong, SP,Li, ZL,Chen, QJ,et al. Total organic carbon and its environmental significance for the surface sediments in groundwater recharged lakes from the Badain Jaran Desert, northwest China[J]. JOURNAL OF LIMNOLOGY,2018,77(9):121-129.
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