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DOI | 10.1002/jqs.3088 |
Late Holocene environmental changes reconstructed from stable isotope and geochemical records from a cushion-plant peatland in the Chilean Central Andes (27 degrees S) | |
Kock, S. T.1,2; Schittek, K.2; Maechtle, B.2; Wissel, H.1; Maldonado, A.3,4,5; Luecke, A.1 | |
发表日期 | 2019 |
ISSN | 0267-8179 |
EISSN | 1099-1417 |
卷号 | 34期号:2页码:153-164 |
英文摘要 | A Late Holocene paleoenvironmental record was obtained from the Lagunillas cushion peatland (LP, 27 degrees 12 ' S, 69 degrees 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 (delta O-18(cell), delta C-13(cell)) and geochemical proxies on organic matter (delta C-13(OM), delta N-15(bulk), TOC, TN, LOI, T-535) were conducted to identify major paleoenvironmental changes in this record. Simultaneously, ambient water (delta O-18, delta H-2) and plant samples of the dominant species Oxychloe andina (delta O-18(cell), delta C-13(cell)) reveal insights into modern conditions. The record reveals distinct multi-centennial oscillations of peat layer thickness and delta O-18(cell). 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, delta O-18(cell) 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 delta O-18(cell) values since 30 cal a BP mark a trend towards again increased aridity. |
WOS研究方向 | Physical Geography ; Geology |
来源期刊 | JOURNAL OF QUATERNARY SCIENCE
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/92833 |
作者单位 | 1.Forschungszentrum Julich, Agrosphere Inst IBG 3, Inst Bio & Geosci, Julich, Germany; 2.Heidelberg Univ, HCE, Inst Geog, Heidelberg, Germany; 3.CEAZA, La Serena, Chile; 4.Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena, Chile; 5.Univ Catolica Norte, Dept Biol Marina, Coquimbo, Chile |
推荐引用方式 GB/T 7714 | Kock, S. T.,Schittek, K.,Maechtle, B.,et al. Late Holocene environmental changes reconstructed from stable isotope and geochemical records from a cushion-plant peatland in the Chilean Central Andes (27 degrees S)[J],2019,34(2):153-164. |
APA | Kock, S. T.,Schittek, K.,Maechtle, B.,Wissel, H.,Maldonado, A.,&Luecke, A..(2019).Late Holocene environmental changes reconstructed from stable isotope and geochemical records from a cushion-plant peatland in the Chilean Central Andes (27 degrees S).JOURNAL OF QUATERNARY SCIENCE,34(2),153-164. |
MLA | Kock, S. T.,et al."Late Holocene environmental changes reconstructed from stable isotope and geochemical records from a cushion-plant peatland in the Chilean Central Andes (27 degrees S)".JOURNAL OF QUATERNARY SCIENCE 34.2(2019):153-164. |
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