Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record
文献类型：期刊论文
| 作者 | Forbes, Matt1,4; Cohen, Tim1,2; Jacobs, Zenobia1,3; Marx, Sam2; Barber, Emily2; Dodson, John5; Zamora, Andres6; Cadd, Haidee4,12,13; Francke, Alexander7; Constantine, Mark4 |
| 刊名 | QUATERNARY SCIENCE REVIEWS
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 252页码:20 |
| ISSN号 | 0277-3791 |
| 关键词 | Interglacials Pollen Charcoal Diatoms Stable isotopes Peat Radiocarbon Vegetation dynamics Optically stimulated luminescence |
| DOI | 10.1016/j.quascirev.2020.106750 |
| 通讯作者 | Forbes, Matt(mforbes@uow.edu.au) |
| 英文摘要 | The widespread formation of organic rich sediments in south-east Australia during the Holocene (Marine Isotope Stage [MIS] 1) reflects the return of wetter and warmer climates following the Last Glacial Maximum (LGM). Yet, little is known about whether a similar event occurred in the region during the previous interglacial (MIS 5e). A 6.8 m sediment core (#LC2) from the now ephemeral Lake Couridjah, Greater Blue Mountains World Heritage Area, Australia, provides insight into this question. Organic rich sediments associated with both MIS 1 and 5e are identified using C-14 and optically stimulated luminescence (OSL) dating techniques. Also apparent are less organic sedimentary units representing MIS 6, 5d and 2 and a large depositional hiatus. Sediment delta C-13 values (-34 to -26 parts per thousand) suggests that C-3 vegetation dominates the organic matter source through the entire sequence. The pollen record highlights the prevalence of sclerophyll trees and shrubs, with local hydrological changes driving variations in the abundance of aquatic and lake-margin species. The upper Holocene sediment (0-1.7 m) is rich in organic matter, including high concentrations of total organic carbon (TOC; 20-40%), fine charcoal and macrophyte remains. These sediments are also characterised by a large proportion of epiphytic diatoms and a substantial biogenic component (chironomids and midges). These attributes, combined with low delta C-13 and delta N-15 values, and C:N ratios of approximately 20, indicate a stable peat system in a swamp like setting, under the modern/Holocene climate. In comparison, the lower organic rich unit (MIS 5e-d) has less TOC (5-10%), is relatively higher in delta C-13 and delta N-15, and is devoid of macrophyte remains and biogenic material. Characterisation of the organic matter pool using C-13-NMR spectroscopy identified a strong decomposition signal in the MIS 5e organic sediments relative to MIS 1. Thus the observed shifts in delta C-13, delta N-15 and C:N data between the two periods reflects changes in the organic matter pool, driven by decompositional processes, rather than environmental conditions. Despite this, high proportions of aquatic pollen taxa and planktonic diatoms in the MIS 5e-d deposits, and their absence in the Holocene indicates that last interglacial Lake Couridjah was deeper and, or, had more permanent water, than the current one. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS关键词 | NEW-SOUTH-WALES ; KOSCIUSZKO NATIONAL-PARK ; MURRAY-DARLING BASIN ; LAST GLACIAL MAXIMUM ; SOIL ORGANIC-MATTER ; VEGETATION HISTORY ; LATE QUATERNARY ; ENVIRONMENTAL-CHANGE ; BLUE MOUNTAINS ; POLLEN RECORD |
| 资助项目 | Friends of Thirlmere Lakes ; Australian Research Council, Centres of Excellence Scheme[CE170100015] ; Australian Research Council, Centres of Excellence Scheme[DP150103875] ; Australian Research Council, Centres of Excellence Scheme[DP190102782] ; New SouthWales state government, DPIE grant (TLRP1) |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000604567600013 |
| 资助机构 | Friends of Thirlmere Lakes ; Australian Research Council, Centres of Excellence Scheme ; New SouthWales state government, DPIE grant (TLRP1) |
| 源URL | [http://ir.ieecas.cn/handle/361006/15833]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 通讯作者 | Forbes, Matt |
| 作者单位 | 1.Univ Wollongong, ARC Ctr Excellence Australian Biodivers & Heritag, Wollongong, NSW, Australia 2.Univ Wollongong, GeoQuest Res Ctr, Sch Earth Atmospher & Life Sci, Wollongong, NSW, Australia 3.Univ Wollongong, Ctr Archaeol Sci CAS, Sch Earth Atmospher & Life Sci, Wollongong, NSW, Australia 4.Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW, Australia 5.Chinese Acad Sci, Inst Earth Environm, Xian, Shaanxi, Peoples R China 6.Ctr Adv Studies Arid Zones CEAZA, La Serena, Chile 7.Univ Adelaide, Dept Earth Sci, Adelaide, SA, Australia 8.Univ Adelaide, Geog Environm & Populat, Adelaide, SA, Australia 9.Univ Adelaide, Sprigg Geobiol Ctr, Adelaide, SA, Australia 10.Oxford Brookes Univ, Dept Social Sci, Oxford, England |
| 推荐引用方式 GB/T 7714 | Forbes, Matt,Cohen, Tim,Jacobs, Zenobia,et al. Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record[J]. QUATERNARY SCIENCE REVIEWS,2021,252:20. |
| APA | Forbes, Matt.,Cohen, Tim.,Jacobs, Zenobia.,Marx, Sam.,Barber, Emily.,...&Woodward, Craig.(2021).Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record.QUATERNARY SCIENCE REVIEWS,252,20. |
| MLA | Forbes, Matt,et al."Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record".QUATERNARY SCIENCE REVIEWS 252(2021):20. |
入库方式： OAI收割
来源：地球环境研究所
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