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Crops for a phosphorus-scarce future: plant adaptation to fluctuating phosphorus availability. Phosphorus is commonly used on farmland to ensure high yields. However, rock phosphate reserves are declining and leaching of phosphorus from farmlands into native vegetation and water bodies causes significant environmental degradation. As a result, more phosphorus-efficient farming systems are urgently required. Many Australian native plants have adapted to low phosphorus soils and fast fluctuations ....Crops for a phosphorus-scarce future: plant adaptation to fluctuating phosphorus availability. Phosphorus is commonly used on farmland to ensure high yields. However, rock phosphate reserves are declining and leaching of phosphorus from farmlands into native vegetation and water bodies causes significant environmental degradation. As a result, more phosphorus-efficient farming systems are urgently required. Many Australian native plants have adapted to low phosphorus soils and fast fluctuations in phosphorus availability. This project aims to investigate plant adaptations to phosphorus fluctuations and the potential for storing phosphorus when it is abundant for later use. This should aid development of crops with improved phosphorus fertiliser-use efficiency in anticipation of a phosphorus-scarce future.Read moreRead less
Unravelling the secrets of the rhizosphere of crops. Phosphate is one of the most important limiting nutrients for crop growth and production. Plant acquisition of soil phosphate largely depends on root proliferation to accelerate soil exploration, and on phosphate bioavailability mediated by root exudates and rhizosphere microorganisms. Central to this is the need for a better understanding of the complex biogeochemical interfaces in the rhizosphere. This project explores recently developed non ....Unravelling the secrets of the rhizosphere of crops. Phosphate is one of the most important limiting nutrients for crop growth and production. Plant acquisition of soil phosphate largely depends on root proliferation to accelerate soil exploration, and on phosphate bioavailability mediated by root exudates and rhizosphere microorganisms. Central to this is the need for a better understanding of the complex biogeochemical interfaces in the rhizosphere. This project explores recently developed non-destructive imaging, isotope, and metabolism techniques to generate a systematic research tool in tracking rhizosphere interactions and imaging phosphate dynamics from macroscale to nanoscale levels. This study will provide new opportunities to improve crop nutrient use efficiency and crop production.Read moreRead less
Understanding mycorrhizal phenotypes using functional traits. This project aims to develop a new framework linked to tangible, measurable traits of beneficial plant-fungal partnerships that lead to empirical predictions. The project expects to deliver an understanding of how ecological strategies of plant-fungal partnerships control plant productivity and soil nutrient cycling. Expected outcomes include new methods for predicting whether beneficial partnerships can be realised and knowledge that ....Understanding mycorrhizal phenotypes using functional traits. This project aims to develop a new framework linked to tangible, measurable traits of beneficial plant-fungal partnerships that lead to empirical predictions. The project expects to deliver an understanding of how ecological strategies of plant-fungal partnerships control plant productivity and soil nutrient cycling. Expected outcomes include new methods for predicting whether beneficial partnerships can be realised and knowledge that can be transformed into recommendations for practitioners. This should lead to significant impact associated with trustworthy assessments of commercial products and of management recommendations, supporting economic and environmental benefits linked with more productive soils and improved ecosystem health.Read moreRead less
Forest ecosystem diversity, function and service in response to perturbations: the key regulatory role of biogeochemical cycling. The natural and anthropogenic perturbations such as elevated atmospheric carbon dioxide (CO2), nitrogen(N) deposition, fires and land contamination have transformed much of the land surface on the earth and significantly modified terrestrial biogeochemical cycles in the past century. This project seeks to develop and apply novel nuclear magnetic resonance spectroscopy ....Forest ecosystem diversity, function and service in response to perturbations: the key regulatory role of biogeochemical cycling. The natural and anthropogenic perturbations such as elevated atmospheric carbon dioxide (CO2), nitrogen(N) deposition, fires and land contamination have transformed much of the land surface on the earth and significantly modified terrestrial biogeochemical cycles in the past century. This project seeks to develop and apply novel nuclear magnetic resonance spectroscopy, isotopic and bio-molecular techniques to examine the key role of interactive biogeochemical cycles of carbon and major elements (N, Phosphorous) in regulating forest ecosystem responses to these perturbations. This project will result in improved mitigation and adaptation strategies for such perturbations, thereby restoring and sustaining forest ecosystems and conserving biodiversity in natural ecosystems.Read moreRead less
Contribution of comammox bacteria to soil nitrification. This project aims to understand the diversity, activity and environmental relevance of comammox bacteria, the newly-discovered complete nitrifiers, in Australian soils, and to evaluate their relative contributions to nitrification processes compared to other canonical nitrifying prokaryotes. Nitrogen transformations are pivotal microbial processes, with nitrification largely responsible for nitrogen losses through nitrous oxide emissions a ....Contribution of comammox bacteria to soil nitrification. This project aims to understand the diversity, activity and environmental relevance of comammox bacteria, the newly-discovered complete nitrifiers, in Australian soils, and to evaluate their relative contributions to nitrification processes compared to other canonical nitrifying prokaryotes. Nitrogen transformations are pivotal microbial processes, with nitrification largely responsible for nitrogen losses through nitrous oxide emissions and nitrate leaching in the terrestrial ecosystems. The expected outcomes will develop new knowledge on the comammox bacteria and provide novel insights into refined strategies to manipulate nitrification processes for improved nitrogen use efficiency and sustainable agricultural management.Read moreRead less
Atmospheric carbon fixation: a novel microbial process in Antarctic soils. This project aims to challenge our global understanding of carbon fixation. In most ecosystems, phototrophy supports higher-trophic life, yet no genetic evidence for photosynthesis exists in Antarctic desert soils. The project will determine the significance of atmospheric chemotrophy, a microbial driven process based on the consumption of atmospheric gases that it is proposed supports energy maintenance and biomass assim ....Atmospheric carbon fixation: a novel microbial process in Antarctic soils. This project aims to challenge our global understanding of carbon fixation. In most ecosystems, phototrophy supports higher-trophic life, yet no genetic evidence for photosynthesis exists in Antarctic desert soils. The project will determine the significance of atmospheric chemotrophy, a microbial driven process based on the consumption of atmospheric gases that it is proposed supports energy maintenance and biomass assimilation in nutrient-starved Antarctic desert soils. Additionally, the project will establish if these processes are structuring soil microbial communities, particularly in response to climate change. The expected project outcome is knowledge of primary production at the nutritional limits of life. This should provide significant benefit, such as a shift in our knowledge of the biological sciences as a new minimalistic mode of primary production.Read moreRead less
Soil ecology in the 21st century - a crucial role in land management. Recent technological advances have helped us discover the role of soil ecology in achieving sustainability in Australia. This project will develop ways to take this complex knowledge and translate it into forms that can be used by land managers. This work will focus on soil carbon sequestration, but is relevant to many other environmental issues.
Ecosystem response to climate and anthropogenic disturbances: implications for greenhouse gas emissions and nutrient cycling. Humanity is challenged with climate change, greenhouse gas emissions, declining fertiliser reserves and a need to feed the world's growing population. This project will result in greater understanding of how ecosystems can respond to these challenges and provide a framework to help Australia manage its agricultural and natural reserves.