What drives vegetation changes in South Sulawesi during the MIS 5e transition?

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dc.contributor.authorKimbrough, Aen_AU
dc.contributor.authorGagan, MKen_AU
dc.contributor.authorDunbar, GBen_AU
dc.contributor.authorTreble, PCen_AU
dc.contributor.authorHantoro, WSen_AU
dc.contributor.authorZhao, JXen_AU
dc.contributor.authorEdwards, RLen_AU
dc.contributor.authorShen, CCen_AU
dc.contributor.authorSuwargadi, Ben_AU
dc.contributor.authorWong, HKYen_AU
dc.contributor.authorRifai, Hen_AU
dc.date.accessioned2024-09-06T02:08:55Zen_AU
dc.date.available2024-09-06T02:08:55Zen_AU
dc.date.issued2024-04-17en_AU
dc.date.statistics2024-09-06en_AU
dc.description.abstractSulawesi speleothem carbon isotopes (δ13C) are found to co-vary with deglacial warming and atmospheric CO2 measured from Antarctic ice cores. This co-variation has thus far been attributed to speleothem δ13C recording changes in vegetation productivity and microbial activity in the soils overlaying caves as vegetation and microbes respond to glacial-interglacial changes in temperature and atmospheric CO2 (Kimbrough et al., 2023; Krause & Kimbrough et al., in press). However, the relationship between speleothem δ13C and regional environmental change is complex and deconvolving the effect of different environmental drivers is difficult. To further investigate the ecosystem response in the Indo-Pacific Warm Pool to substantial warming and CO2 rise during the penultimate deglaciation/marine isotope stage 5e (~127 kyrs ago) we use complimentary geochemical proxies extracted from stalagmite CaCO3. These proxies include phosphorus and sulphur which respond to nutrient uptake by forest biomass above the cave (Treble et al., 2016). The relative abundance of metals such as copper, iron, zinc, and lead are assessed as another means to track biomass/soil regeneration via selective element delivery to the stalagmites by organic colloids flushed from the soil zone (Borsato et al., 2007). These vegetation proxies are compared with the speleothem δ13C and δ18O records and corresponding high-resolution fluorescence mapping of organics via confocal laser scanning (fluorescence) microscopy (Sliwinski & Stoll, 2021). The comparison of transition metals to stable isotopes (δ18O, δ13C) in the Sulawesi speleothem records makes it possible to distinguish between periods in the record where vegetation productivity increased in response to a rise in temperature and CO2 verses periods where changing hydroclimate played a more dominant role. Characterising the appropriate drivers and proxy response is critical to accurately interpret tropical paleoclimate records where interpretations rely on assumptions that rainfall is the primary driver of vegetation change. © Author(s) 2024. This work is distributed under the Creative Commons Attribution 4.0 License.en_AU
dc.identifier.articlenumberEGU24-11806en_AU
dc.identifier.citationKimbrough, A., Gagan, M., Dunbar, G., Treble, P., Hantoro, W., Zhao, J., Edwards, R. L., Shen, C.-C., Suwargadi, B., Wong, H., & Rifai, H. (2024). What drives vegetation changes in South Sulawesi during the MIS 5e transition? Presentation to the EGU General Assembly, Vienna, Austria & Online, 14-19 April 2024, EGU24-11806. doi:10.5194/egusphere-egu24-11806en_AU
dc.identifier.conferenceenddate2024-09-06en_AU
dc.identifier.conferencenameEGU General Assembly 2024en_AU
dc.identifier.conferenceplaceVienna, Austriaen_AU
dc.identifier.conferencestartdate2024-04-14en_AU
dc.identifier.urihttp://dx.doi.org/10.5194/egusphere-egu24-11806en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15677en_AU
dc.language.isoenen_AU
dc.publisherCopernicus Publicationsen_AU
dc.relation.urihttps://doi.org/10.5194/egusphere-egu24-11806, 2024en_AU
dc.subjectCarbon isotopesen_AU
dc.subjectDrill coresen_AU
dc.subjectIceen_AU
dc.subjectAntarcticaen_AU
dc.subjectGlaciersen_AU
dc.subjectClimatic changeen_AU
dc.subjectSoilsen_AU
dc.subjectGeochemistryen_AU
dc.subjectBiomassen_AU
dc.titleWhat drives vegetation changes in South Sulawesi during the MIS 5e transition?en_AU
dc.typeConference Paperen_AU
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