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Seasonal variation in temperature and precipitation affects food availability for organisms. Tropical bats are trophically diverse, representing many feeding guilds, and can represent about half of mammalian diversity in tropical areas. Stable isotope analysis of nitrogen (δ15N) in animal tissues permits inference on phenology of diet and trophic level through repeated sampling of a single tissue over time or by simultaneous sampling of multiple tissues that vary in isotopic turnover rate. The goal of our study was to use multi-tissue stable isotope analysis to investigate the phenology of diet (i.e., trophic-level switching) in bats. We sampled tissues of museum specimens from five tropical bat species representing different trophic guilds (insectivores, frugivores) and movement capacities (wide-ranging, narrow-ranging). We measured δ15N in three metabolically latent (hair, skin, bone) and four active (heart, kidney, spleen, liver) tissues and generated mathematical model predictions of expected δ15N values of these tissues based on their foraging guild. Specifically, we predicted that species with more sedentary movement patterns (i.e., narrow-ranging species) would have high among-tissue variation in δ15N and species that move further and more often (i.e., wide-ranging) would have less δ15N variation among tissues. Our results supported our predictions and suggest that the phenology of diet is detectable by multi-tissue isotope analysis using δ15N.
The ARC$^{\textrm {TM}}$ tokamak, a high-field ($B_T$ = 11.4 T) fusion power plant, under development by Commonwealth Fusion Systems, is studied using a suite of integrated modelling tools to predict its fusion power generation ($P_{fus}$), transport and confinement properties. Analysis is based off an ARC operational point scoped first with zero-dimensional (0-D) plasma operational contour (POPCON) modelling to produce 1.13 GW of fusion power. A suite of integrated modelling tools (TRANSP, ASTRA and TORAX) were applied to predict the performance and kinetic profiles of the ARC design point, yielding a range of predicted performance spanning from ${\sim} 900$ to 1300 MW in rough quantitative agreement with POPCON predictions. The sensitivity of these results to uncertain modelling inputs was probed using scans of pedestal boundary conditions around EPED-predicted values (total pressure and temperature ratios), tungsten concentration and seperatrix density around their nominal assumptions. Pedestal pressure and pedestal top $(T_i/T_e)$ play a large role in 1.5-dimensional performance predictions, able to modify the predicted $P_{fus}$ by a factor of 2 within reasonable assumptions. High-fidelity core nonlinear gyrokinetic profile predictions, performed using CGYRO (Candy et al. 2016 J. Comput. Phys., vol. 324, pp. 73–93) coupled with the PORTALS (Rodriguez-Fernandez et al. 2024 Nucl. Fusion, vol. 64, 076034; Phys. Plasmas, vol. 31, 2024, 062501) framework, yield substantially lower performance ($P_{fus} = 677$ MW) compared with 0-D and medium-fidelity modelling for nominal assumptions, showing that there is non-negligible uncertainty between models and that future work on SPARC may help resolve discrepancies. Lower overall performance results from significantly reduced volume-averaged densities and temperatures, along with reduced levels of density and temperature peaking. Turbulence and transport are largely dominated by ion temperature gradient across the profile, confirmed by both linear stability and the response of the nonlinear fluxes to changes in gradients, with some impact of kinetic ballooning modes in the deep core. This work represents one of the most complete scoping of potential fusion power plant conditions performed to date. The extensive integrated modelling provides confidence in ARC performance approaching 1 GW, while nonlinear gyrokinetic modelling results in open questions into the physics of density and temperature peaking in fusion-power-plant-relevant operational space. A discussion of results and the role that the SPARC tokamak (Creely et al. 2020 J. Plasma Phys., vol. 86, 865860502) will play in informing ARC design, performance and operation is presented.
The Deep South has the highest rates of obesity, diabetes, and hypertension in the nation, with marked disparities by race, socioeconomic status, and rurality. The mission of the Forge AHEAD Center is to improve health outcomes and reduce the burden of cardiometabolic diseases across the Deep South, with a particular focus on the prevention and treatment of these chronic diseases. Forge AHEAD is unified thematically by its application of a precision public health approach across the care continuum, defined as delivering the right intervention to the right population at the right time. This approach acknowledges the importance of context and individual beliefs and preferences, as well as the need for multi-level and multi-domain interventions to achieve health improvements. The Center brings together an interdisciplinary team of investigators from 4 institutions in 3 contiguous states in the region, as well as non-academic partners to extend cardiometabolic research into real-world community and clinical settings. Given the high prevalence of cardiometabolic diseases in the Deep South and the strong research base of the partnering institutions, the Forge AHEAD Center is ideally situated to inform research, clinical care, and policy to improve health outcomes in a region of substantial need.
This book takes two of the most influential minority groups of white settlers in the British Empire—the Irish and the Scots—and explores how they imagined themselves within the landscapes of its farthest reaches, the Australian colonies of Victoria and New South Wales. Using letters and diaries as well as records of collective activities such as committee meetings, parades and dinners, it examines how the Irish and Scots built new identities as settlers in the unknown spaces of Empire. Utilizing critical geographical theories of ‘place’ as the site of memory and agency, the book considers how Irish and Scots settlers grounded their sense of belonging in the imagined landscapes of south-east Australia. Emphasizing the complexity of colonial identity formation and the ways in which this was spatially constructed, it challenges conventional understandings of the Irish and Scottish presence in Australia. The opening chapters locate the book's themes and perspectives within a survey of the existing historical and geographical literature on empire and diaspora. These pay particular attention to the ‘new’ imperial history and to alternative transnational and ‘located’ understandings of diasporic consciousness. Subsequent chapters work within these frames and examine the constructions of place evinced by Irish and Scottish emigrants during the outward voyage and subsequent processes of pastoral and urban settlement, and in religious observance.
This chapter explores the recent historical and geographical literature on empire and colonialism. It argues that the historical literature has remained largely immune to the idea that different social and cultural constructions of space and place might play an instrumental role in colonial identity formation. In particular, it examines the encounter between postcolonial theory and British imperial history per se. The complex intimacies between race, gender and representation have long been common currency in the new imperial history of the non-white empire. Various studies have pointed to the power and tenacity of the subjective colonial geographies created and sustained by different imperial claims to truth. The new imperial history remains remarkably immune to the seductive charms of geography's irredentist claims concerning the inherent spatiality of the human condition. Ethnic performances were integral to some at least of the settler place-narratives created by the Irish and Scots.
This book addresses the complex interplay between settler identities, colonial practice, time and space. It provides a place-centred analysis of settler colonialism as ethnicised ‘white’ experience of the discursive and the local. The case is argued in the context of the so-called Second British Empire, specifically the settler colonies that were created in Australia, as they were in Canada, Aotearoa/New Zealand and South Africa, during the nineteenth century. The historiographical contexts for the place-based approach to settler identities are addressed. Finally, an overview of the chapters included in this book is given. It explores the evidence for ethnicity and other markers of identity within place narratives performed by Scots and Irish settlers en route to and within colonial south-east Australia.
This chapter investigates the four narratives of place which exemplify the complex and ambiguous environmental, racial, social and ethnic semiotics that inflected the pastoral cartographies created by Scots and Irish squatters in Victoria and New South Wales. Charles Fetherstonhaugh, James Hamilton and William Moodie wrote autobiographies celebrating Australia's pioneering era and their role in it. It is apparent that for some squatters, the indigenous presence formed a disquieting element within their colonial present. Acts of enclosure such as those by Patrick Coady Buckley created a new and, for settlers, arguably universal vocabulary of landscape. Scottish architecture offers firmer grounds on which to establish deliberate invocations of ethnic memory. Each squatter's engagement with the physical landscape depended upon cognitive behaviour and environmental learning that were equally subjective. The place meanings enacted in the pastoral landscapes of Victoria and New South Wales by Irish and Scottish squatters were characteristically ambiguous.
This chapter explores the aspects of the contested place meanings that were attached to Belfast, Kiama, Kilmore and Stawell as part of the urban process of colonial foundation. The narratives presented bear witness to the discursively bounded localism of Scottish and Irish colonial urban experience. Urban plans and morphology gave physical shape to the acts of colonial discourse. The inclusive colonial presentism and exclusive ethnic memory played their part in the civic performance of places. The narratives of place and identity offered by the Orange Order in Stawell were publicly contested on at least one occasion. Nineteenth-century Australian towns, including Belfast (Port Fairy), Kiama, Kilmore and Stawell, were sites where the white colonial self found expression through agency, memory and identity. The narratives of urban place performed in Belfast, Kiama, Kilmore and Stawell were as varied as the people themselves.
This chapter describes the ways Scots and Irish migrant mentalités were constructed on board ship during the outward voyage to Australia. It concentrates on the interplay between the performance of Scots and Irish passenger identities within the semiotic shipboard spaces and the temporal and spatial shifts identified by Alexander McNeill and William Lyall. Hassam argues that voyage diaries were much more than simply passive records of events. They were cultural performances which sustained the emigrants' sense of identity during the time-space shifts inherent in the voyage. McMahon Glynn incorporated casual racism into his narrative of the voyage, where it gave colour to his account of socially performed place. McNeill was a prime example of Prentis' ‘taken-for granted Scottishness’. The diaries and journals that do survive suggest that social status and ethnicity elided in complex ways to form ambiguous and nuanced spaces that were performed as place on board.
This chapter argues for increasing recognition of the diversity of the white presence during modern Australia's foundational narrative and for the complex place narratives created by subaltern settler groups as they imbued the landscape with their own sense of self. Place was central to Irish and Scottish diasporic experience. The ethnic diversity of the nineteenth-century British and Irish migration stream to Australia added hitherto under-regarded cultural complexity to the hegemonic white presence on that continent. The Irish migration stream contained various ethnic traditions claiming descent from different periods in the country's history in a complex mix of religion, culture, language and genetics. Churches of all denominations became places where diasporic identities were continuously redefined. Colonial settlement in Victoria and New South Wales was the outcome of individual and collective understanding and aspiration informed by memory and experience.
This chapter describes how the competing ideas of diaspora might inform the understanding of Irish and Scottish overseas settlement within the Empire and elsewhere. It also investigates recent representations of Irish and Scottish settlement in Australia and Aotearoa/New Zealand. The changing narratives of place constructed by Irish and Scottish emigrants and their descendants reflected the strength of each individual's continuing sense of origin as part of their evolving diasporic selfhood. Recent scholarship has emphasised the limited sense of ethnic solidarity displayed by Irish communities. The image of the enterprising, pioneering Scot may well have been a necessary myth of empire. Patrick O'Farrell's emphasis on the importance of place in the construction of human identity closely resembles our own, save in its overwhelming essentialism. The flows of ideas, information, people, goods and capital which articulated the Empire continuously transformed the geographical contexts within which places were imagined and enacted.
This chapter investigates the ways in which Irish and Scots place identities were mediated through discursive religious practice. It also addresses the nature of the religious networks which linked the major Irish and Scots denominations throughout the Empire. The policy of fostering Irish clericalism within the Catholic Church in Australia constituted one discursive network linking Australia and Ireland with other parts of the Empire. Churches were among the most important of all focal points for communities. Churches and other buildings attracted meanings that continuously changed according to time and circumstance. The Irish Catholic Church's transformation under the leadership of Cardinal Cullen privileged explicit missionary enterprise. Religious sites of the sort described here constituted an important part of the ever changing mosaic of semiotic meaning inscribed as place in the Australian landscape by hegemonic and subaltern groups in the white migration stream.