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Get tough, get toxic or get a bodyguard: how root herbivores shape grass defences. The weight of root-feeding beetles can exceed that of sheep on Australian pastures and can result in significant losses in productivity. Grasses fight back against aboveground herbivores using toughness (physical defence), toxicity (chemical defence) and bodyguards (recruitment of the herbivore’s enemies). Little is known about belowground defences however, but grasses depend on roots for re-growth so good root de ....Get tough, get toxic or get a bodyguard: how root herbivores shape grass defences. The weight of root-feeding beetles can exceed that of sheep on Australian pastures and can result in significant losses in productivity. Grasses fight back against aboveground herbivores using toughness (physical defence), toxicity (chemical defence) and bodyguards (recruitment of the herbivore’s enemies). Little is known about belowground defences however, but grasses depend on roots for re-growth so good root defences seem essential. This study will apply optimal defence theory to consider these three defences against belowground herbivory across a range of grasses. The project will ask whether domestication has disarmed grass species and if defensive traits differ between photosynthetic pathways, before field-testing these patterns with root herbivore populations. Read moreRead less
Building insights of our largest terrestrial carbon sink: rangelands soils. Rangelands soils represent Australia’s largest carbon sink. Yet, little is known about their potential for carbon sequestration or their vulnerability to climate and environmental change. This project leverages investments in national terrestrial observation platforms and integrates previous research outputs to develop new methods to measure and build understanding of soil carbon composition and dynamics in rangeland eco ....Building insights of our largest terrestrial carbon sink: rangelands soils. Rangelands soils represent Australia’s largest carbon sink. Yet, little is known about their potential for carbon sequestration or their vulnerability to climate and environmental change. This project leverages investments in national terrestrial observation platforms and integrates previous research outputs to develop new methods to measure and build understanding of soil carbon composition and dynamics in rangeland ecosystems. Under a framework that connects detailed measurements and small-scale processes, with machine-learning, data-model assimilation and large-scale next-generation biogeochemical modelling, it’ll allow more accurate predictions of soil carbon change and better decision-making to guide sustainable rangelands management.Read moreRead less
Multitrophic interactions drive diversity-ecosystem function relationships. Soil communities, among the most abundant and diverse in nature are responsible for many critical ecosystem functions, including nutrient cycling and climate regulation. This project will determine whether consideration and quantification of interactions between different biotic communities – specifically among plants, soil microbes and animals, within and across trophic levels - can address underlying shortcomings in pr ....Multitrophic interactions drive diversity-ecosystem function relationships. Soil communities, among the most abundant and diverse in nature are responsible for many critical ecosystem functions, including nutrient cycling and climate regulation. This project will determine whether consideration and quantification of interactions between different biotic communities – specifically among plants, soil microbes and animals, within and across trophic levels - can address underlying shortcomings in predictions from classical biodiversity-ecosystem function theory. By advancing understanding of biological complexity and its impacts on ecosystem functions, the project will provide a unifying framework for understanding variation in ecosystem functions across scales, ecosystem types and multiple environmental disturbances.Read moreRead less
Finding lost dust storms: re-evaluation of the last 20 years of meteorological records to advance wind erosion mapping in Australia. The Dust Event Database (DEDB) at Griffith University is the only long term (1960 - present) record of wind erosion in Australia. It is used in many studies of the impact of dust on the terrestrial, atmospheric and marine environments as well as in studies of urban and regional air pollution and environmental health. Through this project, the revision of the DEDB w ....Finding lost dust storms: re-evaluation of the last 20 years of meteorological records to advance wind erosion mapping in Australia. The Dust Event Database (DEDB) at Griffith University is the only long term (1960 - present) record of wind erosion in Australia. It is used in many studies of the impact of dust on the terrestrial, atmospheric and marine environments as well as in studies of urban and regional air pollution and environmental health. Through this project, the revision of the DEDB will provide new knowledge on these impacts of wind erosion processes and will inform environmental policy through its contributions to the Caring for Our Country Program, the national State of the Environment, and the Australian Centre for Rangeland Information Systems.Read moreRead less
Reserving nitrogen in soils through microbial nitrate reduction to ammonium. This project aims to identify those microbes able to transform nitrate to ammonium and thus increase soil nitrogen conservation. More than 50 per cent of the nitrogen in fertilisers applied to soils is lost into the environment, which is both a financial loss to farmers and a main anthropogenic source of nitrogen pollution. Some microbes can transform nitrate into ammonium through dissimilatory reduction (DNRA) and thus ....Reserving nitrogen in soils through microbial nitrate reduction to ammonium. This project aims to identify those microbes able to transform nitrate to ammonium and thus increase soil nitrogen conservation. More than 50 per cent of the nitrogen in fertilisers applied to soils is lost into the environment, which is both a financial loss to farmers and a main anthropogenic source of nitrogen pollution. Some microbes can transform nitrate into ammonium through dissimilatory reduction (DNRA) and thus increase soil nitrogen retention. However, the DNRA process and the responsible microbial groups remain largely unknown. This project plans to use isotope tracing and biomolecular approaches to identify those DNRA microbial groups and elucidate the DNRA reaction process. The findings may support the use of DNRA to improve soil nitrogen.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE170101466
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
Can Indigenous land management forestall an extinction crisis? This project aims to test the theory that a lack of Indigenous land management precipitated the collapse of Australia's mammal fauna. Current rates of species extinction exceed background rates by 100-1000 times, because of changes to ecosystems by humans. Paradoxically, Australia’s most pressing extinction crisis could be due to too little human disturbance. This project will test Indigenous land management’s capacity to forestall f ....Can Indigenous land management forestall an extinction crisis? This project aims to test the theory that a lack of Indigenous land management precipitated the collapse of Australia's mammal fauna. Current rates of species extinction exceed background rates by 100-1000 times, because of changes to ecosystems by humans. Paradoxically, Australia’s most pressing extinction crisis could be due to too little human disturbance. This project will test Indigenous land management’s capacity to forestall further mammal declines and restore degraded ecosystems, and enhance Indigenous livelihoods. Anticipated outcomes include on-ground principles for integrating Indigenous knowledge into biodiversity conservation, and transformative insights on the interdependence of humans and their environment.Read moreRead less
Using decision theory to design smart plant surveys. Threatened species may remain unprotected, or weeds detected too slowly if, because of imperfect detection, a species is believed to be absent when it is in fact present. This project will develop new theory and combine it with new estimates of detection rates to minimise the impact of imperfect detection on management decisions.
Weathering the perfect storm: mitigating the post-fire impacts of invasive predators on small desert vertebrates. Wildfires deplete food and shelter resources for many native vertebrates, exposing them to increased predation from invasive predators such as the red fox and feral cat. Focusing on the fire-prone spinifex grasslands of central Australia, this project firstly identifies the role of specific refuge habitats that provide native species with protection in the post-fire environment, and ....Weathering the perfect storm: mitigating the post-fire impacts of invasive predators on small desert vertebrates. Wildfires deplete food and shelter resources for many native vertebrates, exposing them to increased predation from invasive predators such as the red fox and feral cat. Focusing on the fire-prone spinifex grasslands of central Australia, this project firstly identifies the role of specific refuge habitats that provide native species with protection in the post-fire environment, and then proposes an innovative experimental program to quantify and mitigate predation-impacts. The results will stimulate new thinking about predator-prey theory and, in an environment predicted to experience more wildfires in future, provide guidance about how to protect the rich biotic resources of the continental interior. Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120102221
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Investigating the susceptibility of native vegetation edges to alien plant invasion: a quantitative study to help prevent and control invasive species. Alien plant invasion is a major threat to biodiversity in national parks and nature reserves. Determining the relative influence of plant characteristics, number of alien plant seeds and availability of light, water and nutrients on weed invasion will indicate what prevention and control strategies should be used to combat invasive plants.
Discovery Early Career Researcher Award - Grant ID: DE200100157
Funder
Australian Research Council
Funding Amount
$426,343.00
Summary
Breaking the link between predators and bushfire for fauna conservation. This project aims to quantify how bushfires amplify the impacts of invasive predators (feral cats and foxes) on native fauna. Through innovative field experiments and empirical modelling, this project expects to generate new knowledge in the key areas of wildlife conservation, fire ecology and invasive species management. Expected outcomes of this project include transformative insights into how threats interact to influenc ....Breaking the link between predators and bushfire for fauna conservation. This project aims to quantify how bushfires amplify the impacts of invasive predators (feral cats and foxes) on native fauna. Through innovative field experiments and empirical modelling, this project expects to generate new knowledge in the key areas of wildlife conservation, fire ecology and invasive species management. Expected outcomes of this project include transformative insights into how threats interact to influence biodiversity and greatly enhanced capacity to manage bushfires and invasive predators. These advances should provide significant benefits, including improved conservation of threatened species, advances in ecological theory and improved capacity to predict and respond to environmental change.Read moreRead less