Bringing back Australia's lost woodland biodiversity: towards strategic multi-species reintroductions. Australia has the highest rate of mammal extinction of any continent on the planet. This has reduced biodiversity and compromised many important ecological processes. What is the best way to re-build depauperate mammal communities with multi-species reintroductions? What effects do multi-species reintroductions have on recipient ecosystems? This project aims to explore these questions by reintr ....Bringing back Australia's lost woodland biodiversity: towards strategic multi-species reintroductions. Australia has the highest rate of mammal extinction of any continent on the planet. This has reduced biodiversity and compromised many important ecological processes. What is the best way to re-build depauperate mammal communities with multi-species reintroductions? What effects do multi-species reintroductions have on recipient ecosystems? This project aims to explore these questions by reintroducing three mammal species to a critically endangered temperate woodland: a carnivore (the eastern quoll), an insectivore (yellow-footed antechinus), and a herbivore (the eastern chestnut mouse). Results from this sequenced multi-species reintroduction experiment will have broad applicability to ecosystem restoration in Australia and overseas.Read moreRead less
Aboriginal patch burning and the quest for sustainable fire management. This project aims to document historical changes in the spatial grain of the patch burning mosaic in an Arnhem Land savannah with an unbroken history of management by Aboriginal people, and in adjacent areas where traditional management has ceased. The mosaic's spatial grain will be inferred by mapping the individual ages of the long-lived conifer Callitris intratropica. Prior research has shown that Callitris individuals c ....Aboriginal patch burning and the quest for sustainable fire management. This project aims to document historical changes in the spatial grain of the patch burning mosaic in an Arnhem Land savannah with an unbroken history of management by Aboriginal people, and in adjacent areas where traditional management has ceased. The mosaic's spatial grain will be inferred by mapping the individual ages of the long-lived conifer Callitris intratropica. Prior research has shown that Callitris individuals can be reliably aged, and population structures are very sensitive to fire regimes: saplings only establish if unburnt for 10 years. This research is expected to provide the first direct test of the hypothesis that Aboriginal people maintained fine-grained fire mosaics in savannas, and inform bushfire policy debates.Read moreRead less
Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land ....Up in smoke and out to sea? Carbon, water and land use change in savanna. This project aims to improve our understanding of carbon cycling in natural and transformed savannas. It seeks to resolve a large discrepancy in savanna carbon sink size as measured by flux towers compared to long-term direct measures of carbon stock change. This would improve our fundamental understanding of carbon balances (gains/losses) and residence times in these dynamic ecosystems. The long-term impacts of these land use changes on carbon storage are poorly understood, therefore this new knowledge is vital in determining the viability of 'carbon farming' in these landscapes. More accurate information would guide improved land management given the intensification of land use, weed invasion and fire regime change in northern Australia.Read moreRead less
Movement ecology of granivores: informing fire management of savannas. This project aims to examine the decline in granivorous finches across north Australia and test the hypothesis that an increasingly nomadic lifestyle, associated with tracking grass seed availability over larger spatial scales, is the cause. The project also aims to evaluate how fire affects rangeland functioning, particularly grass diversity, to improve fire management of tropical savannas in northern Australia. This project ....Movement ecology of granivores: informing fire management of savannas. This project aims to examine the decline in granivorous finches across north Australia and test the hypothesis that an increasingly nomadic lifestyle, associated with tracking grass seed availability over larger spatial scales, is the cause. The project also aims to evaluate how fire affects rangeland functioning, particularly grass diversity, to improve fire management of tropical savannas in northern Australia. This project will provide new tools and technologies that will monitor mobile small vertebrates. Expected outcomes will improve the understanding of tropical savanna functioning and fire management. The research aligns with ‘savanna burning’ methodologies and carbon sequestration goals in north Australia.
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Impacts of global environmental change on biodiversity of tropical savannas. This project aims to predict the biodiversity consequences of a global trend of increasing woody cover in tropical savannas. Believed to be driven by a combination of elevated atmospheric CO2 concentration, climate change and management actions including fire suppression and cattle grazing. Expected outcomes are the integration of a range of modelling approaches to predict long-term impacts of environmental change on sa ....Impacts of global environmental change on biodiversity of tropical savannas. This project aims to predict the biodiversity consequences of a global trend of increasing woody cover in tropical savannas. Believed to be driven by a combination of elevated atmospheric CO2 concentration, climate change and management actions including fire suppression and cattle grazing. Expected outcomes are the integration of a range of modelling approaches to predict long-term impacts of environmental change on savanna biodiversity and the identification of land-use and management strategies to best mitigate these impacts. Likely benefits are an improved understanding of trade-offs between alternative land-uses in the savannas, including biodiversity conservation, fire management for carbon credits, and cattle grazing.Read moreRead less
Arresting declines of arboreal mammals in the tropical savannas. This project aims to evaluate the hypothesis that arboreal species are limited by the abundance of tree hollows, and that historical increases in the frequency of intense fires may be reducing hollow abundance. Northern Australia’s mammals are in severe decline, and arboreal species are among those that have fared worst. There is abundant anecdotal evidence that a decline in hollow abundance is the cause. Working with the Western A ....Arresting declines of arboreal mammals in the tropical savannas. This project aims to evaluate the hypothesis that arboreal species are limited by the abundance of tree hollows, and that historical increases in the frequency of intense fires may be reducing hollow abundance. Northern Australia’s mammals are in severe decline, and arboreal species are among those that have fared worst. There is abundant anecdotal evidence that a decline in hollow abundance is the cause. Working with the Western Australian Department of Parks and Wildlife in the Kimberley, the last region on the Australian mainland with an intact mammal fauna, the project aims to explore management options for increasing the availability of hollow denning sites for arboreal mammals (e.g. fire management, artificial nest boxes), and evaluate the likely impact of such actions on mammal populations across northern Australia.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE130100434
Funder
Australian Research Council
Funding Amount
$371,114.00
Summary
What fire regimes can maintain biodiversity in northern Australia's savannah landscapes, and how do we implement them? Inappropriate fire regimes (the frequency, intensity and size of bushfires) are causing ongoing declines in Australia's biodiversity, yet we have little understanding of the fire regimes that should be implemented. Focussing on Kakadu National Park in northern Australia, this project will develop optimal fire management strategies for conserving biodiversity.
Pyroherbivory and the nexus between Aboriginal fire mosaics and kangaroos. This project aims to examine the effects of traditional Aboriginal and contemporary fire management on kangaroo abundance. There is concern that the cessation of Aboriginal patch burning is causing savanna kangaroo populations to decline across northern Australia. In this project, surveys will be planned to determine whether fire regime (frequency, extent, season) affects kangaroo distribution and abundance and the degree ....Pyroherbivory and the nexus between Aboriginal fire mosaics and kangaroos. This project aims to examine the effects of traditional Aboriginal and contemporary fire management on kangaroo abundance. There is concern that the cessation of Aboriginal patch burning is causing savanna kangaroo populations to decline across northern Australia. In this project, surveys will be planned to determine whether fire regime (frequency, extent, season) affects kangaroo distribution and abundance and the degree to which non-native large herbivores compete with kangaroos for forage. Experiments will also be planned to discover how the season of burning influences forage quality and quantity. This project is designed to determine if patch burning can be used for ecological restoration in areas where this type of fire management has ceased and for improvement of tropical savanna fire management.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE110100144
Funder
Australian Research Council
Funding Amount
$150,000.00
Summary
Mobile isotope monitoring for environmental studies. This facility will enable a quantum leap in Australia's capacity to undertake real-time, field based studies of environmental processes using the natural isotope tracers of carbon, oxygen and hydrogen. It will enable the researchers to address a range of fundamental research questions in climate change, water resources, ecology and human impact in tropical Australia.