Holocene savanna hydroclimate record from Kinrara Lake, north-east Queensland, Australia

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dc.contributor.authorJames, Jen_AU
dc.contributor.authorComley, Ren_AU
dc.contributor.authorWurster, CMen_AU
dc.contributor.authorLevchenko, VAen_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorBird, MIen_AU
dc.date.accessioned2025-01-09T01:49:10Zen_AU
dc.date.available2025-01-09T01:49:10Zen_AU
dc.date.issued2024-03en_AU
dc.date.statistics2024-09-03en_AU
dc.description.abstractWe present a record of hydroclimatic change over the Holocene from Kinrara Lake, in a seasonally dry savanna location in north-eastern Australia. The record is derived from the oxygen (δ18O) and carbon stable isotope (δ13C) composition of endogenic and biogenic (gastropod) carbonate. The stable isotope proxy records are complemented by elemental geochemical (Itrax) and sedimentological proxy data providing a record of hydrologic and climate change, spanning 10.5 ka to the present day. Two main forms of endogenic carbonate occur in the lake sediments; (i) carbonate associated with biofilms during the early-Holocene, under drier-than-modern conditions, (ii) photosynthetic and evaporatively-enriched precipitates in the late-Holocene, associated with enhanced climate variability inducing drought periods. Strong relationships between negative δ18O values and increased Ti, Rb, Fe/Mn, inc/coh, are linked with strengthened monsoon conditions, while enhanced periods of dryness are inferred from more positive δ18O values, increased Ca/∑Fe, Ti, Al, and subsequent intensifications in lake productivity (higher Si/Ti, S/Ti, Mn/Ti). Three distinct phases can be identified in palaeohydrological history of the lake; (i) a relatively stable drier-than-modern phase during the early-Holocene (10.5 to 8.2 ka), (2) a significantly wetter-than-modern, monsoon-dominated phase through the mid-Holocene into the late-Holocene (8.2–2.8 cal yr BP), and (3) after 2.8 ka, increased intensity of ENSO-related rainfall variability during the late-Holocene, continuing into the present. © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_AU
dc.description.sponsorshipWe thank the property owners at Kinrara Station, Shane and Robyn O'Brien, for permission to access the lagoon, as well as Jen Whan, Shane Askew, Brendan Jones and Yi Hu for assistance with the analytical techniques. Stephen Maxwell kindly provided the gastropod species identifications. This research was funded by AINSE award ALNGRA11038, the Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage (CE170100015) and an Australian Research Council Laureate Fellowship to M.I·B (FL140100044).en_AU
dc.identifier.articlenumber111985en_AU
dc.identifier.citationJames, J., Comley, R., Wurster, C. M., Levchenko, V., Gadd, P., & Bird, M. I. (2024). Holocene savanna hydroclimate record from Kinrara Lake, north-east Queensland, Australia. Palaeogeography, Palaeoclimatology, Palaeoecology, 637, 111985. doi:10.1016/j.palaeo.2023.111985en_AU
dc.identifier.issn0031-0182en_AU
dc.identifier.journaltitlePalaeogeography Palaeoclimatology Palaeoecologyen_AU
dc.identifier.urihttps://doi.org/10.1016/j.palaeo.2023.111985en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15859en_AU
dc.identifier.volume637en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectLakesen_AU
dc.subjectSavannasen_AU
dc.subjectQueenslanden_AU
dc.subjectAustraliaen_AU
dc.subjectCarbonatesen_AU
dc.subjectIsotopesen_AU
dc.subjectCarbonen_AU
dc.subjectOxygenen_AU
dc.subjectStable isotopesen_AU
dc.subjectGeochemistryen_AU
dc.subjectHydrologyen_AU
dc.subjectClimatesen_AU
dc.subjectSulfuren_AU
dc.subjectSiliconen_AU
dc.subjectManganeseen_AU
dc.subjectIronen_AU
dc.subjectRubidiumen_AU
dc.subjectTitaniumen_AU
dc.titleHolocene savanna hydroclimate record from Kinrara Lake, north-east Queensland, Australiaen_AU
dc.typeJournal Articleen_AU
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