Journal Article

FZJ-2019-01526

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Late Holocene environmental changes reconstructed from stable isotope and geochemical records from a cushion-plant peatland in the Chilean Central Andes (27°S)

Kock, S. (Corresponding author)FZJ* ; Schittek, K. ; Mächtle, B. ; Wissel, H.FZJ* ; Maldonado, A. ; Lücke, A.FZJ*

2019
Wiley New York, NY [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/23148  doi:10.1002/jqs.3088

Abstract: A Late Holocene paleoenvironmental record was obtained from the Lagunillas cushion peatland (LP, 27°12'S, 69°17'W), located in the dry Puna of the western Central Andes. Ten radiocarbon dates build the chronology for the last 1800 cal a BP. Analyses of stable isotopes on cellulose (d18Ocell, d13Ccell) and geochemicalproxies on organic matter (d13COM, d15Nbulk, TOC, TN, LOI, T535) were conducted to identify major paleoenvironmental changes in this record. Simultaneously, ambient water (d18O, d2H) and plant samples of the dominant species Oxychloe andina (d18Ocell, d13Ccell) reveal insights into modern conditions. The record revealsdistinct multi-centennial oscillations of peat layer thickness and d18Ocell. Decomposition, changes in the dominating plant species as well as in plant parts (leaves/roots) can be excluded as driving factors for these oscillations. Thus, d18Ocell seems to be externally forced and reflects humidity changes. Around 470 cal a BP a distinct change towards increased humidity occurred, lasting during the Little Ice Age until about 70 cal a BP. Humid conditions prevailed between 1530 and 1270 cal a BP. Increasing d18Ocell values since 30 cal a BP mark a trend towards again increased aridity.

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Contributing Institute(s):

1. Agrosphäre (IBG-3)

Research Program(s):

1. 255 - Terrestrial Systems: From Observation to Prediction (POF3-255) (POF3-255)

Appears in the scientific report 2019

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

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