Hydroclimate proxies for eastern Australia using stable isotopes in grey mangroves (Avicennia marina)

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dc.contributor.authorGoodwin, MJen_AU
dc.contributor.authorVerdon-Kidd, DCen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorEnglish, NBen_AU
dc.contributor.authorHaines, HAen_AU
dc.contributor.authorAllen, KJen_AU
dc.date.accessioned2021-12-22T19:53:05Zen_AU
dc.date.available2021-12-22T19:53:05Zen_AU
dc.date.issued2022-01en_AU
dc.date.statistics2021-01-15en_AU
dc.description.abstractThe development of high-resolution terrestrial palaeoclimate records in Australia is hindered by the scarcity of tree species suitable for conventional dendrochronology. However, novel analytical techniques have made it possible to obtain climate information from tree species that do not reliably form annual growth rings. In this paper we assess the potential of stable carbon and oxygen isotopes in the xylem wood of grey mangroves (Avicennia marina (Forssk.) Vierh.) as hydroclimate proxies for eastern Australia. Bomb-pulse radiocarbon dating and simple age models were used to estimate the age of the growth layers in radial sequence in stems from four grey mangrove trees in two adjacent estuaries in New South Wales, Australia. Stable isotope data measured from the xylem wood of the four stems were composited to yield mean δ18O and δ13C series for the 1962–2016 period. Significant negative Spearman correlations were found between δ18O and rainfall, sea level, instrumental Palmer Drought Severity Index (scPDSI) and the El Niño Southern Oscillation (ENSO), while δ13C was positively correlated with temperature, vapour pressure and evapotranspiration. The results demonstrate that stable oxygen isotopes in grey mangroves have the potential to yield valuable information about pre-instrumental hydroclimate. Grey mangroves can survive with intact centres for an estimate of >250 years based on observed growth rates, are widespread along northern Australian and tropical coastlines and could provide important information regarding pre-instrumental climate in regions currently lacking high-resolution (i.e., near annual) centennial scale climate proxy records. © 2021 Elsevier B.V.en_AU
dc.description.sponsorshipM Goodwin would like to acknowledge financial support from the Australian Institute of Nuclear Science and Engineering (AINSE) (ALNSTU12658). D Verdon-Kidd was also provided financial support for this project by the University of Newcastle (UoN) through a Women in Research Fellowship. Support for radiocarbon analysis was provided by ANSTO via grant ALGRA11952 to K Allen, D Verdon-Kidd and M Goodwin.en_AU
dc.identifier.articlenumber103691en_AU
dc.identifier.citationGoodwin, M. J., Verdon-Kidd, D. C., Hua, Q., English, N. B., Haines, H. A., & Allen, K. J. (2021). Hydroclimate proxies for eastern Australia using stable isotopes in grey mangroves (Avicennia marina). Global and Planetary Change, 208,103691. doi:10.1016/j.gloplacha.2021.103691en_AU
dc.identifier.issn0921-8181en_AU
dc.identifier.journaltitleGlobal and Planetary Changeen_AU
dc.identifier.urihttps://doi.org/10.1016/j.gloplacha.2021.103691en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12642en_AU
dc.identifier.volume208en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMangrovesen_AU
dc.subjectEstuariesen_AU
dc.subjectStable isotopesen_AU
dc.subjectPaleoclimatologyen_AU
dc.subjectCarbon 14en_AU
dc.subjectAustraliaen_AU
dc.titleHydroclimate proxies for eastern Australia using stable isotopes in grey mangroves (Avicennia marina)en_AU
dc.typeJournal Articleen_AU
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