DOI: 10.1016/j.quascirev.2018.05.010
Scopus记录号: 2-s2.0-85048786792
论文题名: The Holocene isotopic record of aquatic cellulose from Lake Äntu Sinijärv, Estonia: Influence of changing climate and organic-matter sources
作者: Street-Perrott F.A. ; Holmes J.A. ; Robertson I. ; Ficken K.J. ; Koff T. ; Loader N.J. ; Marshall J.D. ; Martma T.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 193 起始页码: 68
结束页码: 83
语种: 英语
Scopus关键词: Biochemistry
; Catchments
; Cellulose
; Ecosystems
; Isotopes
; Lakes
; Changing climate
; Core measurements
; Environmental history
; Holocene climate
; Hydrological system
; Organic matter source
; Terrestrial ecosystems
; Total Organic Carbon
; Organic carbon
; biomarker
; bryophyte
; carbonate
; cellulose
; environmental history
; Holocene
; isotopic analysis
; isotopic fractionation
; macroalga
; microalga
; moss
; organic matter
; oxygen isotope
; Preboreal
; total organic carbon
; Biochemistry
; Cellulose
; Ecosystems
; Isotopes
; Lakes
; Total Organic Carbon
; Estonia
; Bryophyta
; bryophytes
; Chara
英文摘要: The well characterized oxygen-isotopic fractionation during cellulose biosynthesis has been utilised by numerous studies of stable isotopes in fine-grained aquatic cellulose. We measured the δ13Ccellulose and δ18Ocellulose values of bulk cellulose and moss fragments from an ∼11.4ka-long core obtained from a shallow, productive, spring-fed, hardwater lake, Äntu Sinijärv, Estonia (59˚3.8′N; 26˚14.5′E; 94.6 m a.s.l.; maximum depth 7.3 m), in order to reconstruct regional Holocene climate and lake-basin evolution. Isotopically, the modern waterbody is a well-behaved, open, hydrological system with negligible evaporative effects. Cellulose-isotope records were compared with down-core measurements of loss-on-ignition (LOI), carbonate and mineral contents, total organic carbon (TOC), total nitrogen (TN), C/N ratio, δ13CTOC, biomarker indices (Palg and Paq), published palaeoecological data and a δ18Ocarbonate record from the same palaeolake. Green microalgae, freshwater macroalgae (Chara) and aquatic bryophytes were important sources of sedimentary cellulose during different phases in the environmental history of the lake. Although a strong palaeoclimatic imprint can be detected in the δ18Ocellulose record from Äntu Sinijärv, notably the Preboreal oscillation, the 8.2ka event and an unnamed cold oscillation ∼3.25ka BP, the isotopic signal of these events may have been amplified by increases in 18O-depleted spring snowmelt. In contrast, δ13Ccellulose was tightly coupled to the Holocene evolution of terrestrial ecosystems and soils by significant inputs of biogenic carbon from the catchment and sublacustrine springs. During the early Holocene, ∼11 – 9ka BP, the δ18Ocellulose and δ18Ocarbonate records diverge markedly, which can be attributed to “no-analogue” seasonal, climatic, hydrological and isotopic conditions resulting from orbital forcing and residual ice-sheet impacts. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112115
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography, College of Science, Swansea University, Swansea, SA2 8PP, United Kingdom; Environmental Change Research Centre, Department of Geography, University College London, Gower Street, London, WC1E 6BT, United Kingdom; Institute of Ecology, Tallinn University, Uus-Sadama 5, Tallinn, 10120, Estonia; Department of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool, L69 3GP, United Kingdom; Department of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
Recommended Citation:
Street-Perrott F.A.,Holmes J.A.,Robertson I.,et al. The Holocene isotopic record of aquatic cellulose from Lake Äntu Sinijärv, Estonia: Influence of changing climate and organic-matter sources[J]. Quaternary Science Reviews,2018-01-01,193