Sulfur cycling in soil environments - how bacteria contribute to the oxidation of organic and inorganic sulfur compounds. Element cycling in soil environments is of global significance as soils constantly exchange compounds with the atmosphere and cover vast areas of land. Many of the compounds exchanged are known contributors to the greenhouse effect and other phenomena such as acid rain. By elucidating the regulation of bacterial sulfur oxidation pathways and their integration into general met ....Sulfur cycling in soil environments - how bacteria contribute to the oxidation of organic and inorganic sulfur compounds. Element cycling in soil environments is of global significance as soils constantly exchange compounds with the atmosphere and cover vast areas of land. Many of the compounds exchanged are known contributors to the greenhouse effect and other phenomena such as acid rain. By elucidating the regulation of bacterial sulfur oxidation pathways and their integration into general metabolism, we will enable the development of better management strategies for agricultural soils. Our data will also significantly improve understanding of how soil processes will change in response to changing climatic conditions.Read moreRead less
Novel oxygen sensing tools for monitoring the effects of dredging on Australian seagrass communities. Seagrass meadows sustain marine biodiversity and the fishing industries on Australian coasts. Dredging of ports and shipping channels is contributing to their rapid global decline. The project will use state-of-the-art technologies in bio-optics and genomics to create a toolkit for seagrass managers to make informed decisions to safeguard seagrass meadows.
Bioplastics in the environment: lifetimes and toxicology. Globally, governments are implementing policies to drive a move to a circular economy. In the process, new materials are being introduced whose potential impacts need to be understood before they are widely used. This project pioneers investigations into the rate and extent of biodegradation of biodegradable plastics in aquatic and soil environments and the associated ecotoxicology of this process. In particular, it aims to quantify the e ....Bioplastics in the environment: lifetimes and toxicology. Globally, governments are implementing policies to drive a move to a circular economy. In the process, new materials are being introduced whose potential impacts need to be understood before they are widely used. This project pioneers investigations into the rate and extent of biodegradation of biodegradable plastics in aquatic and soil environments and the associated ecotoxicology of this process. In particular, it aims to quantify the extent to which the surfaces of these materials accumulate environmental pollutants via adsorption and other mechanisms. The outcomes will include conceptual models of biodegradation across environments, including lifetimes and likely impacts, critical information for framing a sustainable plastics industry.Read moreRead less
Simultaneous analysis of root-derived plant defences and the associated microbiome. Australia is dependent on sustainable agricultural yields, which need to be maintained or improved. This production capacity is currently under threat by new and existing diseases which are predicted to worsen with climate change. This project will provide a global picture of how disease resistance and soil microbial communities are causally linked, and provide new strategies for disease control. In doing so, it ....Simultaneous analysis of root-derived plant defences and the associated microbiome. Australia is dependent on sustainable agricultural yields, which need to be maintained or improved. This production capacity is currently under threat by new and existing diseases which are predicted to worsen with climate change. This project will provide a global picture of how disease resistance and soil microbial communities are causally linked, and provide new strategies for disease control. In doing so, it will develop intellectual property (IP) and infrastructure that can be used in soil health management. This will provide many benefits to Australia, including sustainable agriculture in the context of climate variability and an increased demand for food, biomaterials and biofuels.Read moreRead less
Fine-scale resolution of genomes in natural microbial communities. This project aims to develop advanced molecular and statistical techniques to precisely resolve the genomes of microbes in the environment. Microbes inhabit every niche on the planet and are fundamental to human and animal health, agriculture, and the environment. The proposed technology will advance our understanding of environmental microbes, leading to advances in areas like climate science and biosecurity where microbes play ....Fine-scale resolution of genomes in natural microbial communities. This project aims to develop advanced molecular and statistical techniques to precisely resolve the genomes of microbes in the environment. Microbes inhabit every niche on the planet and are fundamental to human and animal health, agriculture, and the environment. The proposed technology will advance our understanding of environmental microbes, leading to advances in areas like climate science and biosecurity where microbes play a key role. It will also support the development of billion dollar industries focused on the use of beneficial microbes in agriculture, plant, animal, and human health.Read moreRead less
Revealing the microbial process of iron-driven anaerobic ammonium oxidation. This project aims to gain fundamental understanding of the recently discovered microbially-facilitated process of anaerobic ammonium oxidation that is coupled to iron reduction. This process (called Feammox) is suggested to be responsible for significant nitrogen loss from soil and sediment ecosystems, resulting in pollution of the atmosphere and our water systems. In the project, the Feammox microorganisms will be enri ....Revealing the microbial process of iron-driven anaerobic ammonium oxidation. This project aims to gain fundamental understanding of the recently discovered microbially-facilitated process of anaerobic ammonium oxidation that is coupled to iron reduction. This process (called Feammox) is suggested to be responsible for significant nitrogen loss from soil and sediment ecosystems, resulting in pollution of the atmosphere and our water systems. In the project, the Feammox microorganisms will be enriched and characterised to reveal the metabolic details of the iron reduction and ammonium oxidation pathways. This will improve understanding of ecosystem nitrogen flux and benefit the management of nitrogen fertilizers used to meet the food and energy requirements of the world’s growing populations.Read moreRead less
A microscopic and analytical study of extreme thermophile bacteria in simulated environments compared to organic matter in early Earth hydrothermal systems. The study will examine microbial cells and organic residues of cultured thermophilic archaea from simulated extreme environments in terms of temperature, pressure and mineral concentrations. These will be compared, applying observational and geochemical techniques to organic material in geologically earliest ecosystems. A novel approach will ....A microscopic and analytical study of extreme thermophile bacteria in simulated environments compared to organic matter in early Earth hydrothermal systems. The study will examine microbial cells and organic residues of cultured thermophilic archaea from simulated extreme environments in terms of temperature, pressure and mineral concentrations. These will be compared, applying observational and geochemical techniques to organic material in geologically earliest ecosystems. A novel approach will be adopted, of 'backtracking' changes occurring to cultured microbial cells towards their breakdown and disintegration (in contrast to the more common approach of simulating synthesis of organic compounds as a starting point towards structured functioning organisms), and their viability limits. The results of the study will be tested within the currently available theoretical models for the origin of life.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE220101310
Funder
Australian Research Council
Funding Amount
$434,582.00
Summary
A unique and overlooked microbial process scavenging two greenhouse gases. This project aims to perform the first-ever systematic investigation of a novel microbial process, in which two potent gases (methane and nitric oxide) responsible for the climate change are metabolized simultaneously. This process is suggested to be universal in early and modern Earth's aquatic systems, which is a potential but overlooked microbial sink for methane and nitric oxide. By identifying the responsible organis ....A unique and overlooked microbial process scavenging two greenhouse gases. This project aims to perform the first-ever systematic investigation of a novel microbial process, in which two potent gases (methane and nitric oxide) responsible for the climate change are metabolized simultaneously. This process is suggested to be universal in early and modern Earth's aquatic systems, which is a potential but overlooked microbial sink for methane and nitric oxide. By identifying the responsible organisms and their metabolic pathway, this project represents a critical step towards a full understanding of their roles in affecting the greenhouse gas emission. This understanding will also enable us to more reliably predict the global climate change, which is one of the most significant challenges in the 21st Century.Read moreRead less
Iron-dependent anaerobic oxidation of methane process. This project aims to investigate the microbial process of iron-dependent anaerobic oxidation of methane. This process may be pervasive in Earth's aquatic systems, and possibly a major methane sink. This project will identify the organisms mediating this reaction, elucidate their metabolic pathways and characterise their ecophysiological properties. This project is expected to understand how this process regulates the atmospheric concentratio ....Iron-dependent anaerobic oxidation of methane process. This project aims to investigate the microbial process of iron-dependent anaerobic oxidation of methane. This process may be pervasive in Earth's aquatic systems, and possibly a major methane sink. This project will identify the organisms mediating this reaction, elucidate their metabolic pathways and characterise their ecophysiological properties. This project is expected to understand how this process regulates the atmospheric concentration of methane and more reliably predict global methane emissions in a changing climate. By addressing this key knowledge gap, this project will enhance our ability to predict global methane emissions in a changing climate.Read moreRead less
Formation and stabilisation of coastal blue carbon. Blue carbon is organic carbon stored within coastal vegetated ecosystems. This project will examine the composition, formation and dynamics of blue carbon in a range of coastal ecosystems. Combining advanced analytical chemistry with environmental microbiology, we will discover how blue carbon is stabilised and destabilised, a critical factor in nature-based climate change mitigation strategies. Further, we will gain a quantitative understandin ....Formation and stabilisation of coastal blue carbon. Blue carbon is organic carbon stored within coastal vegetated ecosystems. This project will examine the composition, formation and dynamics of blue carbon in a range of coastal ecosystems. Combining advanced analytical chemistry with environmental microbiology, we will discover how blue carbon is stabilised and destabilised, a critical factor in nature-based climate change mitigation strategies. Further, we will gain a quantitative understanding of blue carbon contributions to carbon cycling, providing enhanced modeling and prediction of climate-cycle feedbacks in response to biotic and environmental change. This research will significantly benefit Australia’s effective management of coastal vegetated ecosystems for maximum carbon offsets.Read moreRead less