DOI: 10.1016/j.quascirev.2016.05.011
论文题名: Long-stored soil carbon released by prehistoric land use: Evidence from compound-specific radiocarbon analysis on Soppensee lake sediments
作者: Gierga M. ; Hajdas I. ; van Raden U.J. ; Gilli A. ; Wacker L. ; Sturm M. ; Bernasconi S.M. ; Smittenberg R.H.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 144 起始页码: 123
结束页码: 131
语种: 英语
英文关键词: Compound-specific radiocarbon analysis (CSRA)
; Lacustrine sediments
; Long-chain n-alkanes
; Soppensee/Switzerland
Scopus关键词: Biogeochemistry
; Biological materials
; Biomarkers
; Catchments
; Chains
; Ecology
; Ecosystems
; Lakes
; Land use
; Organic carbon
; Organic compounds
; Paraffins
; Residence time distribution
; Runoff
; Soils
; Average residence time
; Environmental proxies
; Lacustrine sediments
; Long chain n-alkanes
; Radiocarbon analysis
; Soil organic matters
; Soppensee/Switzerland
; Terrestrial biomarkers
; Sediments
; alkane
; biomarker
; carbonate
; catchment
; ecosystem
; isotopic analysis
; isotopic composition
; lacustrine deposit
; land use change
; organic compound
; paleosol
; prehistoric
; radiocarbon dating
; soil carbon
; soil organic matter
; Soppensee
; Switzerland
英文摘要: Compound-specific radiocarbon (14C) analyses allow studying the fate of individual biomarkers in ecosystems. In lakes with small catchments, terrestrial biomarkers have the potential to be used for the dating of sediments that lack the traditionally targeted terrestrial macrofossils, if the specific organic compounds are deposited soon after production. On the other hand, if the biomarkers have been stored for a significant amount of time in the soils of the catchment before transported to the lake, their age can be used to reconstruct changes in average residence time of organic material on land through time. Here we present a study based on compound-specific 14C analysis of the sedimentary record of Lake Soppensee, Switzerland, targeting long-chain n-alkanes of exclusive terrigenous origin, and comparing them with sediment ages obtained by high-resolution macrofossil dating. Additionally, we measured 14C ages of bulk organic matter and carbonate samples to assess the hard water effect. Prior to 3100 cal BP n-alkanes had about the same age as the sediment or they were slightly older, indicating that the vast majority of the terrestrial organic carbon transported to the lake had a short residence time on land. In the samples younger than 3100 cal BP an increasing offset is observed, indicating liberation of old buried soil organic matter that must have accumulated over the previous millennia. Our results indicate that as long as stable ecosystem conditions have prevailed, the distribution and isotopic composition of the n-alkanes can be used as environmental proxies in small catchments with limited surface runoff, confirming a few earlier studies. © 2016 Elsevier Ltd. 资助项目: Hajdas, I.
; Laboratory of Ion Beam Physics, ETH ZürichSwitzerland
; 电子邮件: hajdas@phys.ethz.ch
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59562
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, ETH Zürich, Sonneggstrasse 5, Zürich, Switzerland; Laboratory of Ion Beam Physics, ETH Zürich, Zürich, Switzerland; Department of Surface Waters Research and Management, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; Department of Geological Sciences, Stockholm University, Stockholm, Sweden
Recommended Citation:
Gierga M.,Hajdas I.,van Raden U.J.,et al. Long-stored soil carbon released by prehistoric land use: Evidence from compound-specific radiocarbon analysis on Soppensee lake sediments[J]. Quaternary Science Reviews,2016-01-01,144