Discovery Early Career Researcher Award - Grant ID: DE170100423
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
Sustainable reactive nitrogen management for Australian ecosystems. This project aims to quantify the overall nitrogen budget and its influencing factors in Australia; benchmark Australian performance against other nations; assess the costs and benefits of reactive nitrogen (Nr) use; and analyse policy settings and their feasibility for addressing the challenges of Australian Nr management. Nr, if poorly managed, can cause significant environmental degradation, but is essential for ecosystems, e ....Sustainable reactive nitrogen management for Australian ecosystems. This project aims to quantify the overall nitrogen budget and its influencing factors in Australia; benchmark Australian performance against other nations; assess the costs and benefits of reactive nitrogen (Nr) use; and analyse policy settings and their feasibility for addressing the challenges of Australian Nr management. Nr, if poorly managed, can cause significant environmental degradation, but is essential for ecosystems, especially agro-ecosystems. The project expects to provide a framework for the future sustainable use of Nr in relation to food production, environment protection and climate change in dry regions.Read moreRead less
Successful rehabilitation of species-rich heathlands after mining for heavy minerals. The Eneabba sandplains are located in one of the world's 25 'hotspots' for biodiversity and part of it is mined for heavy minerals. We seek to evaluate the ecology of rehabilitated minesites by comparing their species composition, spatial arrangement, functional attributes and response to experimental fire with that of the surrounding heathlands. This will enable us to gauge the new system's resilience to fire ....Successful rehabilitation of species-rich heathlands after mining for heavy minerals. The Eneabba sandplains are located in one of the world's 25 'hotspots' for biodiversity and part of it is mined for heavy minerals. We seek to evaluate the ecology of rehabilitated minesites by comparing their species composition, spatial arrangement, functional attributes and response to experimental fire with that of the surrounding heathlands. This will enable us to gauge the new system's resilience to fire and recommend corrective measures necessary to modify the pathway of restoration of the post-mining ecosystems as required. Because we take spatial relations and disturbance into account our approach is innovative and relevant to restoration ecology generally.Read moreRead less
Increasing sandalwood (Santalum spicatum) recruitment in regional Western Australia through mammal conservation. The highly prized sandalwood is the basis of an industry that employs over 100 people and generates $12 million export income annually in regional WA. Natural recruitment of sandalwood is poor. This project will build on research, conducted by Murdoch University and the Forest Products Commission, that indicates natural recruitment of the tree is greatly enhance in the presence of nat ....Increasing sandalwood (Santalum spicatum) recruitment in regional Western Australia through mammal conservation. The highly prized sandalwood is the basis of an industry that employs over 100 people and generates $12 million export income annually in regional WA. Natural recruitment of sandalwood is poor. This project will build on research, conducted by Murdoch University and the Forest Products Commission, that indicates natural recruitment of the tree is greatly enhance in the presence of native rat-kangaroos who cache the seeds. This project will train an APA(I) postgraduate through an industry based project that will evaluate increased recruitment of sandalwood by native mammal caching. Many of these mammals are Conservation Dependent or Threatened with extinction.Read moreRead less
Refining Restoration Ecology: Is Range of Historical Variability an appropriate concept to guide ecosystem management and restoration? Ecosystem restoration is an urgent task in many Australian landscapes. Range of Historical Variability (RHV) theory provides an influential but largely untested framework to guide restoration activities. We will test the RHV proposition that biodiversity conservation is enhanced if the structure of altered ecosystems is restored within the pre-settlement range. P ....Refining Restoration Ecology: Is Range of Historical Variability an appropriate concept to guide ecosystem management and restoration? Ecosystem restoration is an urgent task in many Australian landscapes. Range of Historical Variability (RHV) theory provides an influential but largely untested framework to guide restoration activities. We will test the RHV proposition that biodiversity conservation is enhanced if the structure of altered ecosystems is restored within the pre-settlement range. Plants, vertebrates and invertebrates will be compared between ?unrestored? Callitris woodlands dominated by post-settlement regrowth, and ?restored? stands where regrowth has been reduced within the RHV. This will be the first test of RHV theory to encompass a range of taxonomic and functional groups at both local and landscape scales.Read moreRead less
The pharmacokinetics of plant secondary metabolites and their effects on feeding in the brushtail possum. Plant secondary metabolites (PSMs) are considered to protect against herbivory, although the mechanisms are not well understood. This project will determine how marsupial folivores avoid toxicity when browsing on Eucalyptus leaf. Blood levels of terpenes, phenols and their metabolites will be measured in the brushtail possum while it feeds on a diet of varying PSM content. We expect to be ab ....The pharmacokinetics of plant secondary metabolites and their effects on feeding in the brushtail possum. Plant secondary metabolites (PSMs) are considered to protect against herbivory, although the mechanisms are not well understood. This project will determine how marsupial folivores avoid toxicity when browsing on Eucalyptus leaf. Blood levels of terpenes, phenols and their metabolites will be measured in the brushtail possum while it feeds on a diet of varying PSM content. We expect to be able to show relationships between the ingestion and blood levels of PSMs and feeding behaviour. This will give a greater understanding of the effect of plant toxins on browsing behaviour, enabling improved foraging models and more effective habitat management.Read moreRead less
Assessing long term change in rangeland health and building models for change, using historical photos and monitoring data. Long-term photo sites and vegetation data will be used to make an assessment of change over the last few decades in the arid pastoral rangelands of Western Australia.
The aims are to: make a judgement about whether the changes have been positive or negative (for particular value systems); make a case for causality; explore links between vegetation data and soil surface, ....Assessing long term change in rangeland health and building models for change, using historical photos and monitoring data. Long-term photo sites and vegetation data will be used to make an assessment of change over the last few decades in the arid pastoral rangelands of Western Australia.
The aims are to: make a judgement about whether the changes have been positive or negative (for particular value systems); make a case for causality; explore links between vegetation data and soil surface, biodiversity and remotely-sensed data; and contribute to the building of models of expected change.
Outcomes will include the meeting of national and international conventions and strategies, and an increased ability of the pastoral industry to access international markets.
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Optimising fire management for a resilient future. Optimising fire management for a resilient future. This project aims to quantify how changes in fire frequency, fire season, invasive weeds and climate interact to affect native species’ persistence. Fire risk management is a conundrum for agencies responsible both for protection of life and property and biodiversity conservation. Global change factors (rainfall decline, warming, invasive species, ecosystem fragmentation) interact with changes i ....Optimising fire management for a resilient future. Optimising fire management for a resilient future. This project aims to quantify how changes in fire frequency, fire season, invasive weeds and climate interact to affect native species’ persistence. Fire risk management is a conundrum for agencies responsible both for protection of life and property and biodiversity conservation. Global change factors (rainfall decline, warming, invasive species, ecosystem fragmentation) interact with changes in fire regime (interval and season) associated with prescribed burning to affect native species’ regeneration capacity. Anticipated outcomes are fuel reduction burning policy and management changes that balance and minimise risk of fire to economy, society and biodiversity.Read moreRead less
Reversing the loss of Leadbeater’s Possum habitat: An integrated stand- and landscape-scale approach to accelerating habitat development. Rapid loss of habitat threatens the Leadbeater's possum with extinction before the end of this century. This project aims to develop a range of stand-scale silvicultural prescriptions to accelerate the development of the key features of Leadbeater's possum habitat: large, hollow-bearing trees and a relatively dense Acacia mid-storey. These aim to then inform l ....Reversing the loss of Leadbeater’s Possum habitat: An integrated stand- and landscape-scale approach to accelerating habitat development. Rapid loss of habitat threatens the Leadbeater's possum with extinction before the end of this century. This project aims to develop a range of stand-scale silvicultural prescriptions to accelerate the development of the key features of Leadbeater's possum habitat: large, hollow-bearing trees and a relatively dense Acacia mid-storey. These aim to then inform landscape-scale management planning scenarios developed in conjunction with the Partner Organisations, DEPI and VicForests, to identify spatially and temporally explicit strategies for modifying forest management practices in the key areas of Leadbeater's possum habitat. The outcome aims to be an empirically based landscape-scale management plan to maximise the long-term viability of Leadbeater's possum.Read moreRead less
Spatially explicit solutions for managing fire and biodiversity. This project aims to develop a framework for predicting the impact of future fire regimes on the distribution and abundance of plant and animal species. Inappropriate fire regimes are one of the most significant threats to biodiversity in Australia. There is an urgent need to better understand how species respond to fire and to develop effective fire management strategies that achieve conservation goals. This project intends to int ....Spatially explicit solutions for managing fire and biodiversity. This project aims to develop a framework for predicting the impact of future fire regimes on the distribution and abundance of plant and animal species. Inappropriate fire regimes are one of the most significant threats to biodiversity in Australia. There is an urgent need to better understand how species respond to fire and to develop effective fire management strategies that achieve conservation goals. This project intends to integrate ecological models, fire behaviour simulation and formal decision-making approaches to evaluate alternative fire scenarios in real landscapes. The major output is anticipated to be linked ecological models and decision tools that help managers to better protect biodiversity in flammable landscapes.Read moreRead less
Forty million Australians: the future of our biodiversity. Many countries have experienced rapid increases in human numbers and natural-resource use. The project will use measured effects on biodiversity from such countries, combined with models of potential changes in Australia's population and climate, to forecast how our biodiversity may be affected up to 2050, and then to plan how to minimize negative impacts.