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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.
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
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.
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
Dynamic soil landscape carbon modelling. Soil is the largest terrestrial store of carbon. This project will enhance our understanding of the causes and controls of spatial and temporal variations of soil carbon which is crucial for managing climate change, food water and energy security and for maintenance of biodiversity.
A general soil spatial scaling theory. Soil diversity is crucial for maintenance of sustainable ecosystems. Soil varies on a continuum from microbial habitats to fields, regions, continents and the globe. This project will take a unifying approach to derive a general spatial scaling theory that will allow us to estimate the likely behaviour of soil properties at all scales. Understanding the scaling behaviour of soil means one can be certain about describing the changes in relationships between ....A general soil spatial scaling theory. Soil diversity is crucial for maintenance of sustainable ecosystems. Soil varies on a continuum from microbial habitats to fields, regions, continents and the globe. This project will take a unifying approach to derive a general spatial scaling theory that will allow us to estimate the likely behaviour of soil properties at all scales. Understanding the scaling behaviour of soil means one can be certain about describing the changes in relationships between soil properties and processes. It will enhance the ability to monitor soil property changes through time, essential for gauging effects of climate change and achieving food security. Read moreRead less
Global space-time soil carbon assessment. Soil carbon is a key component of functional ecosystems and is crucial for food, water and energy security, and for climate change mitigation. The project will contribute to global understanding of soil carbon and its management for sustainable wellbeing.
Discovery Early Career Researcher Award - Grant ID: DE150100870
Funder
Australian Research Council
Funding Amount
$342,000.00
Summary
Unravelling the microbial mechanisms of soil nitrous oxide emissions. Soil ecosystems are believed to be the most dominant sources of global nitrous oxide emissions. However, mitigations of nitrous oxide are strongly hindered by lack of knowledge on microbial mechanisms underpinning its production. This project aims to integrate a range of advanced approaches to identify the key nitrogen cycling genes as best predictors of nitrous oxide in field studies, to disentangle relative contribution of m ....Unravelling the microbial mechanisms of soil nitrous oxide emissions. Soil ecosystems are believed to be the most dominant sources of global nitrous oxide emissions. However, mitigations of nitrous oxide are strongly hindered by lack of knowledge on microbial mechanisms underpinning its production. This project aims to integrate a range of advanced approaches to identify the key nitrogen cycling genes as best predictors of nitrous oxide in field studies, to disentangle relative contribution of microbial pathways to nitrous oxide in glasshouse and microcosm studies, and to validate these findings across various land-use types in Australia and China. This will provide a critical framework incorporating microbial data into the nitrous oxide prediction models for better mitigation of greenhouse gas emissions.Read moreRead less
Changing water availability and the conservation of wide-ranging species. Changing water availability and the conservation of wide-ranging species. This project aims to examine the factors that influence conservation in multiple-use zones, using a functional habitat approach to study hollow-dependent black-cockatoos and parrots in the jarrah forest of south-western Australia as a model system. It will focus on how water availability influences landscape use, and its potential as a management too ....Changing water availability and the conservation of wide-ranging species. Changing water availability and the conservation of wide-ranging species. This project aims to examine the factors that influence conservation in multiple-use zones, using a functional habitat approach to study hollow-dependent black-cockatoos and parrots in the jarrah forest of south-western Australia as a model system. It will focus on how water availability influences landscape use, and its potential as a management tool, and use this information to effectively conserve wide-ranging species in multiple-use landscapes in a changing climate. The project is anticipated to reduce the negative effects of competing land uses on biodiversity and improve the efficiency of conservation and landscape management.Read moreRead less