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The Radiocarbon Ages of Different Organic Components in the Mires of Eastern Australia

Published online by Cambridge University Press:  15 November 2018

Len Martin ,
James Goff ,
Geraldine Jacobsen  and
Scott Mooney Open the ORCID record for Scott Mooney [Opens in a new window]
Len Martin
Affiliation:
School of Biological Earth and Environmental Sciences, UNSW Australia, Sydney, NSW2052, Australia
James Goff
Affiliation:
School of Biological Earth and Environmental Sciences, UNSW Australia, Sydney, NSW2052, Australia
Geraldine Jacobsen
Affiliation:
Institute for Environmental Research, The Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW2232, Australia
Scott Mooney*
Affiliation:
School of Biological Earth and Environmental Sciences, UNSW Australia, Sydney, NSW2052, Australia
*
*Corresponding author. Email: [email protected].
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Abstract

Radiocarbon (14C) dating is widely used to determine the age of organic material in palaeoenvironmental research. Here we compare 14C dates (n=17) resulting from macro-charcoal (>250 μm), short-lived plant macrofossils and pollen-rich residues isolated from two mire environments in eastern Australia. In most samples we found that short-lived plant macrofossils were the youngest organic component, the charcoal samples most often fell into the middle and the pollen-rich residues consistently returned older dates than the other samples. Although pollen-rich residues have been widely used for 14C dating in Australasia we suggest some caution in their use, perhaps because in our fire-prone environments these samples often also contain fine charcoal and other oxidative resistant organic matter that is older than the surrounding sediment matrix. The macro-charcoal samples also often returned older calibrated ages compared to short-lived plant macrofossils from the same depth, although this difference was relatively small (<245 years). Our results demonstrate that 14C dating of short-lived plant macrofossils are likely to yield more accurate chronologies and we advocate their routine use in palaeoenvironmental research when they are available.

Keywords

charcoalpeatplant macrofossilspollenradiocarbon dating
Type
Research Article
Information
Radiocarbon , Volume 61 , Issue 1 , February 2019 , pp. 173 - 184
Copyright
© 2018 by the Arizona Board of Regents on behalf of the University of Arizona 

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References

REFERENCES

Black, MP, Mooney, SD, Attenbrow, V. 2008. Implications of a 14,200 year contiguous fire record for understanding human-climate relationships at Goochs Swamp, New South Wales, Australia. The Holocene 18:437447.Google Scholar
Blois, JL, Williams, JW, Grimm, EC, Jackson, ST, Graham, RW. 2011. A methodological framework for assessing and reducing temporal uncertainty in paleovegetation mapping from late-Quaternary pollen records. Quaternary Science Reviews 30:1926–1939.Google Scholar
Blong, RJ, Gillespie, R. 1978. Fluvially trasported charcoal gives erroneous 14C ages for recent deposits. Nature 271:739–741.Google Scholar
Bostock, HC, Barrows, TT, Carter, L, Chase, Z, Cortese, G, Dunbar, GB, Ellwood, M, Hayward, B, Howard, W, Neil, HL et al. 2013. A review of the Australian-New Zealand sector of the Southern Ocean over the last 30ka (Aus-INTIMATE project). Quaternary Science Reviews 74:35–57.Google Scholar
Bowler, JM, Qi, H, Kezoa, C, Head, MJ, Baoyin, Y. 1986. Radiocarbon dating of playa-lake hydrologic changes: examples from northwestern China and central Australia. Palaeogeog. Palaeoclimatol. Palaeoecol. 54:241–260.Google Scholar
Bronk Ramsey, C. 2008. Deposition models for chronological records. Quaternary Science Reviews 27(1–2):42–60.Google Scholar
Bronk Ramsey, C. 2009a. Bayesian analysis of radiocarbon dates. Radiocarbon 51(1):337–360.Google Scholar
Bronk Ramsey, C. 2009b. Dealing with outliers and offsets in radiocarbon dating. Radiocarbon 51(3):1023–1045.Google Scholar
Brown, TA, Nelson, DE, Mathewes, RW, Vogel, JS, Southon, JR. 1989. Radiocarbon dating of pollen by accelerator mass spectrometry. Quaternary Research 32:205–212.Google Scholar
Clymo, RS, MacKay, D. 1987. Upwash and downwash of pollen and spores in the unsaturated surface layer of Sphagnum-dominated peat. New Phytologist 105:175–183.Google Scholar
de Vleeschouwer, F, Chambers, FM, Swindles, GT. 2010. Coring and sub-sampling of peatlands for palaeoenvironmental research. Mires and Peat 7:1–10.Google Scholar
Dodson, JR, Zhou, W. 2000. Radiocarbon dates from a Holocene deposit in southwestern Australia. Radiocarbon 42:229–234.Google Scholar
Faegri, K, Iversen, J. 1975. Textbook of Pollen Analysis. Oxford: Blackwell Scientific Publishing.Google Scholar
Fink, D, Hotchkis, M, Hua, Q, Jacobsen, G, Smith, AM, Zoppi, U, Child, D, Mifsud, C, van der Gaast, H, Williams, A, Williams, M. 2004. The ANTARES AMS facility at ANSTO. Nuclear Instruments and Methods in Physics Research B 223:109–115.Google Scholar
Gillespie, R, Magee, JW, Luly, JG, Dlugokencky, E, Sparks, RJ, Wallace, G. 1991. AMS radiocarbon dating in the study of arid environments: Examples from Lake Eyre, South Australia. Palaeogeog. Palaeoclimatol. Palaeoecol. 84:333–338.Google Scholar
Hogg, AG, Higham, TFG. 1998. 14C dating of modern marine and estuarine shellfish. Radiocarbon 40:975–984.Google Scholar
Hogg, AG, Hua, Q, Blackwell, PG, Niu, M, Buck, CE, Guilderson, TP, Heaton, TJ, Palmer, JG, Reimer, PJ, Reimer, RW, Turney, CSM, Zimmerman, SRH. 2013. SHCAL13 Southern Hemisphere calibration, 0–50,000 years cal BP. Radiocarbon 55:1–15.Google Scholar
Hope, G, Nanson, R, Jones, P. 2011. The Peat-Forming Bogs and Fens of the Snowy Mountains of New South Wales. Canberra: Office of Environment and Heritage, NSW Government.Google Scholar
Hope, GS, Whinam, J. 2005. The Peatlands of the Australasian Region. In: Steiner GM, editor. Mires–from Siberia to Tierra del Fuego. S Biologiezentrum der Oberoesterreichischen Landesmuseen: Linz. p 397–434.Google Scholar
Howarth, JD, Fitzsimons, SJ, Jacobsen, GE, Vandergoes, MJ, Norris, RJ. 2013. Identifying a reliable target fraction for radiocarbon dating sedimentary records from lakes. Quaternary Geochronology 17:68–80.Google Scholar
Jowsey, P. 1966. An improved peat sampler. New Phytology 65:245–248.Google Scholar
Kershaw, AP, Mckenzie, GM, Porch, N, Roberts, RG, Brown, J, Heijnis, H, Orr, ML. 2007. A high-resolution record of vegetation and climate through the last glacial cycle from Caledonia Fen, southeastern highlands of Australia. Quaternary International 22:481–500.Google Scholar
Kilian, MR, van der Plicht, J, van Geel, B, Goslar, T. 2002. Problematic 14C-AMS dates of pollen concentrates from Lake Gosciaz (Poland). Quaternary International 88:21–26.Google Scholar
Lowe, DJ, Shane, PAR, Alloway, BV, Newnham, RM. 2008. Fingerprints and age models for widespread New Zealand tephra marker beds erupted since 30,000 years ago: a framework for NZ-INTIMATE. Quaternary Science Reviews 27:95–126.Google Scholar
Lowe, DJ, Blaauw, M, Hogg, AG, Newnham, RM. 2013. Ages of 24 widespread tephras erupted since 30,000 years ago in New Zealand, with re-evaluation of the timing and palaeoclimatic implications of the Lateglacial cool episode recorded at Kaipo bog. Quaternary Science Reviews 74:170–194.Google Scholar
Martin, L. 2017. Records of postglacial hydroclimatic variability from the peat-forming environments of the Sydney region [PhD thesis]. University of New South Wales, Sydney, Australia.Google Scholar
Mensing, SA, Southron, JR. 1999. A simple method to separate pollen for AMS radiocarbon dating and its application to lacustrine and marine sediments. Radiocarbon 41:1–8.Google Scholar
Moss, PT, Tibby, J, Petherick, L, McGowan, H, Barr, C. 2013. Late Quaternary vegetation history of North Stradbroke Island, Queensland, eastern Australia. Quaternary Science Reviews 74:257–272.Google Scholar
Nanson, RA. 2009. The evolution of peat-swamp channels and organic floodplains, Barrington Tops, New South Wales, Australia. Geographical Research 47:434–448.Google Scholar
Newnham, RM, Vandergoes, MJ, Garnett, MH, Lowe, DJ, Prior, C, Almond, PC. 2007. Test of AMS 14C dating of pollen concentrates using tephrochronology. Journal of Quaternary Science 22:37–51.Google Scholar
Oswald, WW, Anderson, PM, Brown, TA, Brubaker, LB, Hu, FS, Lozhkin, AV, Tinner, W, Kaltenrieder, P. 2005. Effects of sample mass and macrofossil type on radiocarbon dating of arctic and boreal lake sediments. The Holocene 15:758–767.Google Scholar
Petchey, F, Ulm, S, David, B, McNiven, IJ, Asmussen, B, Tomkins, H, Richards, T, Rowe, C, Leavesley, M, Mandui, H, Stanisic, J. 2012. 14C marine reservoir variability in herbivores and deposit-feeding gastropods from an open coastline, Papua New Guinea. Radiocarbon 54(3–4):967–978.Google Scholar
Porch, N, Kershaw, AP. 2007. Comparative AMS 14C dating of plant macrofossils, beetles and pollen preparations from two late Pleistocene sites in southeastern Australia. Terra Australis 32:395–403.Google Scholar
Vandergoes, MJ, Prior, CA. 2003. AMS dating of pollen concentrates—a methodological study of late Quaternary sediments from South Westland, New Zealand. Radiocarbon 45:479–491.Google Scholar
Vandergoes, MJ, Hogg, AG, Lowe, DJ, Newnham, RM, Denton, GH, Southon, J, Barrell, DJA, Wilson, CJN, McGlone, MS, Allan, ASR, Almond, PC, Petchey, F, Dabell, K, Dieffenbacher-Krall, AC, Blaauw, M. 2013. A revised age for the Kawakawa/Oruanui tephra, a key marker for the Last Glacial Maximum in New Zealand. Quaternary Science Reviews 74:195–201.Google Scholar
Whinam, J, Hope, GS. 2005. The peatlands of the Australasian region. In: Steiner GM, editor. Moore–von Sibirien bis Feuerland–Mires–from Siberia to Tierra del Fuego. Biologiezentrum der Oberoesterreichischen Landesmuseen Neue Serie 35, Linz. p 397–434.Google Scholar
Whinam, J, Hope, GS, Clarkson, BR, Buxton, RP, Alspach, PA, Adam, P. 2003. Sphagnum in peatlands of Australasia: Their distribution, utilisation and management. Wetlands Ecology and Management 11:37–49.Google Scholar
Wust, R, Jacobsen, GE, Van Der Gaast, SJ, Smith, AM. 2008. Comparison of radiocarbon ages from different organic fractions in tropical peat cores: insights from Kalimantan, Indonesia. Radiocarbon 50:359–372.Google Scholar