Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record

doi:10.1016/j.quascirev.2020.106750

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record
	Forbes, Matt 1,4; Cohen, Tim 1,2; Jacobs, Zenobia 1,3; Marx, Sam 2; Barber, Emily 2; Dodson, John 5; Zamora, Andres 6; Cadd, Haidee 4,12,13; Francke, Alexander 7; Constantine, Mark 4; Mooney, Scott 4; Short, Julia 8,9; Tibby, John 8,9,14; Parker, Adrian 1,10; Cendon, Dioni 4,11; Peterson, Mark 11; Tyler, Jon 7; Swallow, Elizabeth 2; Haines, Heather 12,13; Gadd, Patricia 11; Woodward, Craig 11
通讯作者	Forbes, Matt(mforbes@uow.edu.au)
	2021-01-15
发表期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
卷号	252 页码:20
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.
关键词	Interglacials Pollen Charcoal Diatoms Stable isotopes Peat Radiocarbon Vegetation dynamics Optically stimulated luminescence
DOI	10.1016/j.quascirev.2020.106750
关键词[WOS]	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
收录类别	SCI ; SCI
语种	英语
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
项目资助者	Friends of Thirlmere Lakes ; Australian Research Council, Centres of Excellence Scheme ; New SouthWales state government, DPIE grant (TLRP1)
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000604567600013
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15834
专题	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 11.Australian Nucl Sci & Technol Org, Lucas Heights, Australia 12.Univ New South Wales, ARC Ctr Excellence Australian Biodivers & Heritag, Sydney, NSW, Australia 13.Univ New South Wales, Chronos, 14Carbon Cycle Facil, Sydney, NSW, Australia 14.James Cook Univ, ARC Ctr Excellence Australian Biodivers & Heritag, Douglas, Qld, Australia
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.