Adelaide Research & ScholarshipThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.https://digital.library.adelaide.edu.au:443/dspace2024-03-29T00:25:02Z2024-03-29T00:25:02ZNovel ecological interactions alter physiological responses of range-extending tropical and local temperate fishes under ocean warmingSasaki, M.Michell, A.Booth, D.J.Nagelkerken, I.https://hdl.handle.net/2440/1404892024-03-28T04:10:34Z2024-01-01T00:00:00ZTitle: Novel ecological interactions alter physiological responses of range-extending tropical and local temperate fishes under ocean warming
Author: Sasaki, M.; Michell, A.; Booth, D.J.; Nagelkerken, I.
Abstract: Global warming facilitates species range-expansions, leading to novel biological interactions between local and range-expanding species. Little is still known of how such novel interactions modify the performance of interacting species or how these interactions might be altered under climate change. Here, we used an aquarium experiment to investigate the novel ecological interactions between a poleward range-extending coral reef damselfish ("tropical-vagrant") and a local temperate species ("temperate-local") collected from a climate warming hotspot in SE Australia. We measured the effect of novel interactions (isolated vs. paired fish species) on energy expenditure (activity levels, oxidative stress, and antioxidant responses), energy gain (feeding rates), and growth rates of both fish species under present-day (23 °C) and future ocean temperatures (26 °C). Short-term growth rates were faster in both species under novel interactions (paired species), regardless of elevated temperature. Compared to isolated species, activity level, feeding rate and oxidative stress level were also higher in the paired temperate fish but not in the paired tropical fish. The tropical fish showed an increased feeding rate and long-term growth under elevated temperature, irrespective of novel interactions. We conclude that novel ecological interactions under climate change can be an important driver of physiological traits in sympatric tropical and temperate fishes and can mediate critical physiological performance of fishes under ocean warming.
Description: Available online 17 December 20232024-01-01T00:00:00ZInterfacial Engineering of Zn Metal via a Localized Conjugated Layer for Highly Reversible Aqueous Zinc Ion BatteryLiu, Z.Li, G.Xi, M.Huang, Y.Li, H.Jin, H.Ding, J.Zhang, S.Zhang, C.Guo, Z.https://hdl.handle.net/2440/1404882024-03-26T06:38:13Z2024-01-01T00:00:00ZTitle: Interfacial Engineering of Zn Metal via a Localized Conjugated Layer for Highly Reversible Aqueous Zinc Ion Battery
Author: Liu, Z.; Li, G.; Xi, M.; Huang, Y.; Li, H.; Jin, H.; Ding, J.; Zhang, S.; Zhang, C.; Guo, Z.
Abstract: Aqueous zinc-ion batteries are regarded as promising and efficient energy storage systems owing to remarkable safety and satisfactory capacity. Nevertheless, the instability of zinc metal anodes, characterized by issues such as dendrite growth and parasitic side reactions, poses a significant barrier to widespread applications. Herein, we address this challenge by designing a localized conjugated structure comprising a cyclic polyacrylonitrile polymer (CPANZ), induced by a Zn2+-based Lewis acid (zinc trifluoromethylsulfonate) at a temperature of 120 °C. The CPANZ layer on the Zn anode, enriched with appropriate pyridine nitrogen-rich groups (conjugated cyclic C=N ), exhibits a notable affinity for Zn2+ with ample deposition sites. This zincophilic skeleton not only serves as a protective layer to guide the deposition of Zn2+ but also functions as proton channel blocker, regulating the proton flux to mitigate the hydrogen evolution. Additionally, the strong adhesion strength of the CPANZ layer guarantees its sustained protection to the Zn metal during long-term cycling. As a result, the modified zinc electrode demonstrates long cycle life and high durability in both half-cell and pouch cells. These findings present a feasible approach to designing high performance aqueous anodes by introducing a localized conjugated layer.2024-01-01T00:00:00ZConstraining the geothermal parameters of in situ Rb–Sr dating on Proterozoic shales and their subsequent applicationsSubarkah, D.Nixon, A.L.Jimenez, M.Collins, A.S.Blades, M.L.Farkaš, J.Gilbert, S.E.Holford, S.Jarrett, A.https://hdl.handle.net/2440/1404872024-03-26T06:23:52Z2022-01-01T00:00:00ZTitle: Constraining the geothermal parameters of in situ Rb–Sr dating on Proterozoic shales and their subsequent applications
Author: Subarkah, D.; Nixon, A.L.; Jimenez, M.; Collins, A.S.; Blades, M.L.; Farkaš, J.; Gilbert, S.E.; Holford, S.; Jarrett, A.
Abstract: Recent developments in tandem laser ablation mass spectrometer technology have demonstrated the capacity for separating parent and daughter isotopes of the same mass online. As a result, beta-decay chronometers can now be applied to the geological archive in situ as opposed to through traditional whole-rock digestions. One novel application of this technique is the in situ Rb–Sr dating of Proterozoic shales that are dominated by authigenic clays such as illite. This method can provide a depositional window for shales by differentiating signatures of early diagenetic processes versus late-stage secondary alteration. However, the hydrothermal sensitivity of the Rb–Sr isotopic system across geological timescales in shale-hosted clay minerals is not well understood. As such, we dated the Mesoproterozoic Velkerri Formation from the Altree 2 well in the Beetaloo Sub-basin (greater McArthur Basin), northern Australia, using this approach. We then constrained the thermal history of these units using common hydrocarbon maturity indicators and modelled effects of contact heating due to the intrusion of the Derim Derim Dolerite. In situ Rb–Sr dating of mature, oil-prone shales in the diagenetic zone from the Velkerri Formation yielded ages of 1448 ± 81, 1434 ± 19, and 1421 ± 139 Ma. These results agree with previous Re–Os dating of the unit and are interpreted as recording the timing of an early diagenetic event soon after deposition. Conversely, overmature, gasprone shales in the anchizone sourced from deeper within the borehole were dated at 1322 ± 93 and 1336 ± 40 Ma. These ages are younger than the expected depositional window for the Velkerri Formation. Instead, they are consistent with the age of the Derim Derim Dolerite mafic intrusion intersected 800 m below the Velkerri Formation. Thermal modelling suggests that a single intrusion of 75 m thickness would have been capable of producing a significant hydrothermal perturbation radiating from the sill top. The intrusion width proposed by this model is consistent with similar Derim Derim Dolerite sill thicknesses found elsewhere in the McArthur Basin. The extent of the hydrothermal aureole induced by this intrusion coincides with the window in which kerogen from the Velkerri Formation becomes overmature. As a result, the mafic intrusion intersected here is interpreted to have caused kerogen in these shales to enter the gas window, induced fluids that mobilize trace elements, and reset the Rb–Sr chronometer. Consequently, we propose that the Rb–Sr chronometer in shales may be sensitive to temperatures of ca. 120 ◦C in hydrothermal reactions but can withstand temperatures of more than 190 ◦C in thermal systems not dominated by fluids. Importantly, this study demonstrates a framework for the combined use of in situ Rb–Sr dating and kerogen maturation indicators to help reveal the thermochronological history of Proterozoic sedimentary basins. As such, this approach can be a powerful tool for identifying the hydrocarbon potential of source rocks in similar geological settings.2022-01-01T00:00:00ZExperimental investigation of the influence of fibre content on the flexural performance of simply supported and continuous steel/UHPC composite slabsChen, S.Visintin, P.Oehlers, D.J.https://hdl.handle.net/2440/1404862024-03-26T06:00:03Z2023-01-01T00:00:00ZTitle: Experimental investigation of the influence of fibre content on the flexural performance of simply supported and continuous steel/UHPC composite slabs
Author: Chen, S.; Visintin, P.; Oehlers, D.J.
Abstract: The application of relatively low volumes of fibres in normal strength concrete has been shown to be of significant benefit when applied to composite slabs with profiled sheet decking. This paper reports on an experimental study aimed at quantifying further potential benefits that may arise from applying ultra-high performance fibre reinforced concrete. To assess performance six simply supported beams were tested under hogging and sagging loading configurations along with three two span continuous beams. Fibre contents are varied from 0% to 2% and changes in strength, deformation, crack width and moment redistribution are measured. At the serviceability limit state, it is shown that the addition of high fibre volumes can significantly enhance member stiffness and reduce crack widths in all beams. At the ultimate limit state it is observed that a transition from 0% to 1% fibres significantly increases strength but that there is a maximum fibre volume beyond which no further increases in strength are possible. Conversely, member ductility and moment redistribution are shown to be strongly proportional to fibre volume.2023-01-01T00:00:00Z