Discovery Early Career Researcher Award - Grant ID: DE210100043
Funder
Australian Research Council
Funding Amount
$454,000.00
Summary
Kangaroos, feral herbivores and bushfires: Consequences for forest dynamics. This project aims to investigate the functional role of native and introduced herbivores in forest ecosystems using a powerful, highly replicated, herbivore exclosure experiment. This project expects to create new knowledge of the effects of mammalian herbivores, particularly kangaroos and invasive deer, on forest plants, soils and productivity. Expected outcomes include fundamental insights into above and belowground i ....Kangaroos, feral herbivores and bushfires: Consequences for forest dynamics. This project aims to investigate the functional role of native and introduced herbivores in forest ecosystems using a powerful, highly replicated, herbivore exclosure experiment. This project expects to create new knowledge of the effects of mammalian herbivores, particularly kangaroos and invasive deer, on forest plants, soils and productivity. Expected outcomes include fundamental insights into above and belowground interactions in forests, and an enhanced capacity to predict effects of changing herbivore populations across environmental gradients, and following bushfire. This should produce significant benefits for forest management in Australia, allowing informed, targeted, and pre-emptive management of invasive herbivore populations.Read moreRead less
Does coevolution drive speciation? This project aims to connect micro-evolutionary processes with macro-evolutionary patterns to test the extent to which tightly coupled co-evolutionary interactions between species drive evolutionary diversification. The project will use techniques including the most recent phylogenetic modelling methods, field experiments and molecular genetics. Expected outcomes include advancing understanding of the mechanisms that generate biodiversity and developing new tec ....Does coevolution drive speciation? This project aims to connect micro-evolutionary processes with macro-evolutionary patterns to test the extent to which tightly coupled co-evolutionary interactions between species drive evolutionary diversification. The project will use techniques including the most recent phylogenetic modelling methods, field experiments and molecular genetics. Expected outcomes include advancing understanding of the mechanisms that generate biodiversity and developing new techniques for acquisition of DNA from museum specimens. The project is expected to provide significant benefits, such as insights into the processes that promote new species in nature.Read moreRead less
Managing complex networks in endangered grasslands to restore food webs. This project aims to quantify the impacts of native and non-native animal consumer removal by examining food webs in endangered grasslands. Grasslands are Australia’s largest biome yet land-use changes, livestock and invasive plants, have altered entire food webs, including the integrity of ecosystem services such as nutrient cycling. Measuring disrupted food webs in field experiments, then modelling the impacts of mammals ....Managing complex networks in endangered grasslands to restore food webs. This project aims to quantify the impacts of native and non-native animal consumer removal by examining food webs in endangered grasslands. Grasslands are Australia’s largest biome yet land-use changes, livestock and invasive plants, have altered entire food webs, including the integrity of ecosystem services such as nutrient cycling. Measuring disrupted food webs in field experiments, then modelling the impacts of mammals to invertebrates, will assist managers in making more effective decisions relating to ecosystem integrity. Understanding the consequences of biodiversity loss including implications for ecosystem resilience is crucial to Australia’s future food production, carbon sequestration and hydrological flows.Read moreRead less
Forecasting live fuel moisture content, the on/off switch for forest fire. Dry forest fuels are a precursor of large bushfires. This research aims to develop, for the first time, a model to reliably forecast the moisture content of live fuels (e.g. the foliage and fine branches of shrubs and trees). This will be achieved by combining (i) satellite-derived estimates of live fuel moisture content, (ii) forecasts of soil moisture, and (iii) plant physiological responses to soil dryness. Forecasts o ....Forecasting live fuel moisture content, the on/off switch for forest fire. Dry forest fuels are a precursor of large bushfires. This research aims to develop, for the first time, a model to reliably forecast the moisture content of live fuels (e.g. the foliage and fine branches of shrubs and trees). This will be achieved by combining (i) satellite-derived estimates of live fuel moisture content, (ii) forecasts of soil moisture, and (iii) plant physiological responses to soil dryness. Forecasts of live fuel moisture content will deliver an early warning system of the risk of bushfires. These forecasts will also facilitate improved planning of prescribed burns: if fuels are too dry there is a risk of burns escaping, conversely, if fuels are too wet there is a risk that burns will fail to meet objectives.Read moreRead less
Tree-mediated methane fluxes: A new frontier in the global carbon cycle. Methane is an extremely potent greenhouse gas. Recent evidence suggests that tree-mediated fluxes may be a significant, but overlooked source of methane to the atmosphere. This project aims to quantify the magnitude and drivers of tree-mediated methane fluxes from Australia’s dominant forest types. Innovatively, we will be using a novel combination of empirical field based measurements, gas tracer experiments, microbial ana ....Tree-mediated methane fluxes: A new frontier in the global carbon cycle. Methane is an extremely potent greenhouse gas. Recent evidence suggests that tree-mediated fluxes may be a significant, but overlooked source of methane to the atmosphere. This project aims to quantify the magnitude and drivers of tree-mediated methane fluxes from Australia’s dominant forest types. Innovatively, we will be using a novel combination of empirical field based measurements, gas tracer experiments, microbial analysis and modelling methods. Expected outcomes are a mechanistic understanding of tree-mediated methane fluxes, helping to constrain regional, national and global methane budgets. The results of this study will help inform publicly funded greenhouse gas abatement strategies, ensuring a maximal return on investment.Read moreRead less
The ecological impact of large carnivore restoration. This project aims to assess the ecological changes that have arisen due to the repatriation of estuarine crocodiles to Australian ecosystems. It is significant because the restoration provides a rare opportunity to empirically test changes in ecosystem processes under varying degrees of large carnivore predation pressure. Expected outcomes include improved understanding of the processes that govern the strength of predator-ecosystem interacti ....The ecological impact of large carnivore restoration. This project aims to assess the ecological changes that have arisen due to the repatriation of estuarine crocodiles to Australian ecosystems. It is significant because the restoration provides a rare opportunity to empirically test changes in ecosystem processes under varying degrees of large carnivore predation pressure. Expected outcomes include improved understanding of the processes that govern the strength of predator-ecosystem interactions and an ability to quantify the biomass, social structure, and behaviours of predators required to influence these processes. Benefits should include improvements in how the ecological role of large carnivores is measured, and when and where carnivore populations should be culled or conserved.Read moreRead less
Species redundancy in response to multiple disturbances. This project aims to elucidate how the context within which disturbances occur affects food web linkages and how these map to responses in ecosystem function. There is a critical need to test the common assumption in environmental management that high biodiversity makes ecosystems resilient to disturbances. Studies that merely observe biodiversity change after disturbance cannot identify ecological processes connecting high diversity and e ....Species redundancy in response to multiple disturbances. This project aims to elucidate how the context within which disturbances occur affects food web linkages and how these map to responses in ecosystem function. There is a critical need to test the common assumption in environmental management that high biodiversity makes ecosystems resilient to disturbances. Studies that merely observe biodiversity change after disturbance cannot identify ecological processes connecting high diversity and ecosystem function, making experiments that manipulate identical disturbances in ecosystems with different biodiversity essential. This project will use field experiments that manipulate disturbances in streams replicated in low and high biodiversity regions and across gradients of chronic background stress to show how biodiversity sustains functional ecosystems, and how much diversity can be lost before ecosystems collapse.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100683
Funder
Australian Research Council
Funding Amount
$418,735.00
Summary
Catastrophic shifts: the value of knowing more about ecosystem feedbacks. Ecosystems respond to gradual change in unexpected ways. Feedback processes between different parts of an environment can perpetuate ecosystem collapse, leading to potentially irreversible biodiversity loss. However, it is unclear if greater knowledge of feedbacks will ultimately change environmental decisions. The project aims to identify when feedbacks matter for environmental decisions, by generating new methods that pr ....Catastrophic shifts: the value of knowing more about ecosystem feedbacks. Ecosystems respond to gradual change in unexpected ways. Feedback processes between different parts of an environment can perpetuate ecosystem collapse, leading to potentially irreversible biodiversity loss. However, it is unclear if greater knowledge of feedbacks will ultimately change environmental decisions. The project aims to identify when feedbacks matter for environmental decisions, by generating new methods that predict the economic benefit of knowing more about feedbacks. Combining ecological modelling and value-of-information theory, the outcomes of these novel methods will provide significant and broad environmental benefits, by enabling managers to make informed decisions and stay one step ahead of potential ecosystem collapse.Read moreRead less
Understanding the importance of lianas for forest health and management. This project aims to assess the impact of lianas (woody vines) and their removal on forest health and value. New field infrastructure, removal experiments and global datasets will be used to compare forest health under varying liana dominance, determine whether lianas are preventing recovery, and to predict regional and global impacts. The project expects to generate new knowledge regarding ecosystem function and global cha ....Understanding the importance of lianas for forest health and management. This project aims to assess the impact of lianas (woody vines) and their removal on forest health and value. New field infrastructure, removal experiments and global datasets will be used to compare forest health under varying liana dominance, determine whether lianas are preventing recovery, and to predict regional and global impacts. The project expects to generate new knowledge regarding ecosystem function and global change biology, building collaboration between ecologists, economists and forest managers. The project expects to have significant implications for forest health and the global economy. The expected benefit will be implementation of restoration methods in priority areas and subsequently improved forest health.Read moreRead less
Understanding snow gum dieback for effective and integrated management. The project leverages recent research and infrastructure investments and our determined and collaborative team as it aims to: 1) assess the future geography of snow gum dieback in the high country and identify priority locations for pro-active management, 2) quantify the impact of snow gums on high country water and carbon budgets and thus the socio- economic and biodiversity values, and 3) determine options for mitigation. ....Understanding snow gum dieback for effective and integrated management. The project leverages recent research and infrastructure investments and our determined and collaborative team as it aims to: 1) assess the future geography of snow gum dieback in the high country and identify priority locations for pro-active management, 2) quantify the impact of snow gums on high country water and carbon budgets and thus the socio- economic and biodiversity values, and 3) determine options for mitigation. Dieback of our iconic snow gum forests is diminishing the ecological, hydrological and cultural values of the Australian Alps and will impact state and national water-supply and power-generation systems. Our research will inform Alps-wide management efforts designed for long-term success.Read moreRead less