Journal Article

PreJuSER-111949

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A millennial record of environmental change in peat deposits from the Misten bog (East Belgium)

De Vleeschouwer, F. ; Pazdur, A. ; Luthers, C. ; Streel, M. ; Mauquoy, D. ; Wastiaux, C. ; Le Roux, G. ; Moschen, R.FZJ* ; Blaauw, M. ; Pawlyta, J. ; Sikorski, J. ; Piotrowska, N.

2012
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.quaint.2011.12.010

Abstract: In this study, palaeoenvironmental changes recorded in the top metre of a peat profile (Misten bog, East Belgium) were investigated using a multiproxy approach. Proxies include bulk density, Ti and Si content, pollen, macrofossils, delta C-13 on specific Sphagnum stems, and delta C-13-delta O-18 on Sphagnum leaves. A high-resolution chronology was generated using Pb-210 measurements and 22 C-14 AMS dates on carefully selected Sphagnum macrofossils. delta C-13 only records large change in mire surface wetness. This is partly due to the fact that the core was taken from the edge of a hummock, which may make it difficult to track small isotopic changes. The delta C-13 signal seems to be dependent upon the Sphagnum species composition. For example, a change between Sphagnum section Cuspidata towards Sphagnum imbricatum causes a significant drop in the delta C-13 values. On the whole, the C and O isotopes record two shallow pool phases during the 8th-9th and the 13th centuries. Pollen and atmospheric soil dust (ASD) fluxes records increased human occupation in the area. There may be some climatic signals in the ASD flux, but they are difficult to decipher from the increasing human impact (land clearance, agriculture) during the last millennium. The variations in the proxies are not always synchronous, suggesting different triggering factors (temperature, wetness, windiness) for each proxy. This study also emphasizes that, compared to studies dealing with pollution using geochemical proxies, palaeoclimatic inferences from peat bogs need as many proxies as possible, together with highly accurate and precise age-models, in order to better understand climate variability and their consequences during the Holocene. (C) 2011 Elsevier Ltd and INQUA. All rights reserved.

Keyword(s): J

Note: W. Shotyk (University of Heidelberg) is warmly thanked for loaning his Wardenaar corer and for having let us use the peat-cutting facilities at the IES (University of Heidelberg, Germany). Michel Mathijs and Mona Court-Picon were of great help on the field. We thank Konrad Tudyka and Agnieszka Wiszniowska for their help with the <SUP>14</SUP>C sample preparation. Pascal Mertes (DNF-Belgian Forest and Nature Ministry) is also acknowledged for providing us with the official authorization for coring the Misten bog. This research was funded through the ATIS ('Absolute Time Scales and Isotope Studies for Investigating Events in Earth and Human History') Marie Curie Transfer of Knowledge project MTKD-CT-2005-029642. The WD-XRF data aquisition was made possible by Richard Bindler (Umea University) through a research grant from the Kempe Foundation, which also provided a post doc fellowship to F. De Vlee-schouwer in 2010. We thank guest editor Paul D.M. Hughes, Jonathan Nichols, and one anonymous reviewer for their useful comments on an earlier version of this manuscript.

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Contributing Institute(s):

1. Agrosphäre (IBG-3)

Research Program(s):

1. Terrestrische Umwelt (P24)

Appears in the scientific report 2012

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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