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Switching partners: a driving force for tree productivity in a changing environment? Eucalypts take part in a mutually beneficial association with diverse communities of mycorrhizal fungi to satisfy nutrient demands. The fungi that eucalypts interact with change as they grow but the reasons for this shift are not known. To improve forestry management strategies, the project will determine why and how this shift occurs.
Pyrogenic carbon sequestration in Australian soils. Pyrogenic Carbon ('charcoal') is a poorly understood component of the global carbon cycle, important because it is resistant to degradation and hence has potential soil carbon sequestration benefits. This project applies a new technique (hydrogen pyrolysis), in combination with spectroscopic techniques, to quantify charcoal in a pan-Australian soil sample set, collected using uniform stratified sampling and preparation protocols. This will ena ....Pyrogenic carbon sequestration in Australian soils. Pyrogenic Carbon ('charcoal') is a poorly understood component of the global carbon cycle, important because it is resistant to degradation and hence has potential soil carbon sequestration benefits. This project applies a new technique (hydrogen pyrolysis), in combination with spectroscopic techniques, to quantify charcoal in a pan-Australian soil sample set, collected using uniform stratified sampling and preparation protocols. This will enable the mapping of soil charcoal stocks in relation to environmental and soil variables across Australia. The results will enable understanding of the controls on charcoal sequestration potential in Australian soils and contribute to efforts to quantify soil charcoal stocks and dynamics globally.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
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
Reintroduction of ecosystem engineers as a woodland restoration tool. Can we help restore woodlands by reintroducing extinct native mammals? Through a strategic partnership combining innovative research and conservation action, this project will investigate how returning extinct 'ecosystem engineers' could be used as a tool for restoring healthy temperate woodland ecosystems.
Understanding grassy woodlands as whole ecosystems. Restoring Australia's once vast grassy woodlands needs a sound understanding of the whole ecosystem and robust scientific evidence to inform conservation action. This project will generate such evidence by establishing a National Outdoor Laboratory to inform the sustainable management of our nation's precious remaining woodlands.
Unravelling soil carbon response to warming in fire-affected ecosystems. This project aims to reveal the continental pattern of soil carbon (C) response to warming in fire-affected ecosystems across Australia and to unravel the biogeochemical mechanisms underlying fire’s role in shaping the temperature sensitivity of soil respiration. Fire has modified over 40% of the Earth’s land surface and wildfire frequency is predicted to increase under global warming. This project expects to generate new k ....Unravelling soil carbon response to warming in fire-affected ecosystems. This project aims to reveal the continental pattern of soil carbon (C) response to warming in fire-affected ecosystems across Australia and to unravel the biogeochemical mechanisms underlying fire’s role in shaping the temperature sensitivity of soil respiration. Fire has modified over 40% of the Earth’s land surface and wildfire frequency is predicted to increase under global warming. This project expects to generate new knowledge on how fire influences soil-to-atmosphere C fluxes in a warmer climate using a multi-disciplinary approach. Expected outcomes include an enhanced capacity to predict the terrestrial ecosystem-to-atmosphere C fluxes and their feedbacks to climate under increasing frequency of fire using Earth-system models. 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
Does fire control vegetation in the Tasmanian World Heritage Area? Aims: This project aims to discriminate between competing explanations for vegetation patterns in the Tasmanian Wilderness World Heritage Area: (a) fire (the legacy of Aboriginal burning), or (b) soil. We will do this through a novel, transdisciplinary research program.
Significance: The project expects to create new knowledge essential for achieving evidence-based fire management, as well as to advance a globally important ecol ....Does fire control vegetation in the Tasmanian World Heritage Area? Aims: This project aims to discriminate between competing explanations for vegetation patterns in the Tasmanian Wilderness World Heritage Area: (a) fire (the legacy of Aboriginal burning), or (b) soil. We will do this through a novel, transdisciplinary research program.
Significance: The project expects to create new knowledge essential for achieving evidence-based fire management, as well as to advance a globally important ecological theory.
Outcomes: Expected outcomes include significantly strengthened fire science and fire management capacity in Tasmania.
Benefit: Benefits should include the protection of globally significant cultural, biological and landscape values that sustain the vibrant Tasmanian tourist economy.Read moreRead less
Forecasting soil conditions. Not knowing where and how soil responds to climate change and human intervention compromises food, water, climate and energy security. Currently there is a lack of soil process knowledge and data infrastructure collectively causing significant uncertainty and risk in the assessments of key threats to soil. The project devises a transformational digital soil model to forecast where and how soil pH and carbon will change in New South Wales. Tested on sites within Au ....Forecasting soil conditions. Not knowing where and how soil responds to climate change and human intervention compromises food, water, climate and energy security. Currently there is a lack of soil process knowledge and data infrastructure collectively causing significant uncertainty and risk in the assessments of key threats to soil. The project devises a transformational digital soil model to forecast where and how soil pH and carbon will change in New South Wales. Tested on sites within Australia, the model will give insight on the drivers of change and will provide a unique analysis of the effect of climate change and land management on the dynamics of soil.Read moreRead less