Aggregate structure of humic organic matter. Soil aquatic organic matter is important in plant growth, nutrient supply and water quality and in affecting pollutants and metal ions in the environment. Indeed the survival of life on the planet depends on the way geo-organic matter functions. We have recently developed a new host guest theory on the way this material binds important substances such as metal ions and pollutants. This project aims to use this theory to investigate the structure of th ....Aggregate structure of humic organic matter. Soil aquatic organic matter is important in plant growth, nutrient supply and water quality and in affecting pollutants and metal ions in the environment. Indeed the survival of life on the planet depends on the way geo-organic matter functions. We have recently developed a new host guest theory on the way this material binds important substances such as metal ions and pollutants. This project aims to use this theory to investigate the structure of these materials and how they work in Nature by understanding molecular composition at a level hitherto thought impossible.Read moreRead less
Host-guest structure of humic organic matter - the key to understanding soil organic properties. Soil and aquatic organic matter is important in plant growth, nutrient supply and water quality and in affecting pollutants and metal ions in the environment. Indeed, the survival of life on the planet depends on the way geo-organic matter functions. We have recently developed a new host?guest theory on the way this material binds important substances such as metal ions and pollutants. This proje ....Host-guest structure of humic organic matter - the key to understanding soil organic properties. Soil and aquatic organic matter is important in plant growth, nutrient supply and water quality and in affecting pollutants and metal ions in the environment. Indeed, the survival of life on the planet depends on the way geo-organic matter functions. We have recently developed a new host?guest theory on the way this material binds important substances such as metal ions and pollutants. This project aims to use this theory to investigate the structure of these materials and how they work in Nature by understanding molecular composition at a level hitherto thought impossible.Read moreRead less
Tracing life's beginnings: molecular fossils from single oil inclusions. Biomarkers (chemical fossils) from traces of oil trapped in 2 to 3.5 billion year-old rocks from Australia, Canada and Africa will be analysed by both well established and novel techniques. The biomarkers will be used to assess which key groups of species were present when, and thus constrain the timing of evolution of Earth's early biosphere.
Molecular fossils, environmental genomics and the natural history of an Australian salt lake. Increasing salinity of lakes is a critical problem for sustainable water supply in Australia. To comprehend the consequences of human-induced salinization, it is crucial to understand salt lakes at their most fundamental level. This project develops pioneering technologies to elucidate the microbial ecology and geochemistry of salt lakes in unprecedented detail. It will open new pathways to unravel how ....Molecular fossils, environmental genomics and the natural history of an Australian salt lake. Increasing salinity of lakes is a critical problem for sustainable water supply in Australia. To comprehend the consequences of human-induced salinization, it is crucial to understand salt lakes at their most fundamental level. This project develops pioneering technologies to elucidate the microbial ecology and geochemistry of salt lakes in unprecedented detail. It will open new pathways to unravel how microbial ecosystems adapt to increasing salinization, and how they reacted to climate fluctuations in the past. Students will gain multidisciplinary skills in environmental genomics, proteomics and geochemistry, a unique combination that will become decisive for understanding and preserving ecosystems on our continent.Read moreRead less
Oxygenating the Earth: using innovative techniques to resolve the timing of the origin of oxygen-producing photosynthesis in cyanobacteria. The early Earth was a hostile place with little oxygen in the atmosphere. Then cyanobacteria ('blue-green algae') invented oxygen-releasing photosynthesis. That profound event affected many fundamental processes, from the course of evolution to the formation of ore deposits. However, estimates of when these bacteria originated are disputed with uncertainties ....Oxygenating the Earth: using innovative techniques to resolve the timing of the origin of oxygen-producing photosynthesis in cyanobacteria. The early Earth was a hostile place with little oxygen in the atmosphere. Then cyanobacteria ('blue-green algae') invented oxygen-releasing photosynthesis. That profound event affected many fundamental processes, from the course of evolution to the formation of ore deposits. However, estimates of when these bacteria originated are disputed with uncertainties of hundreds of millions of years. We will resolve those uncertainties. We have developed new analytical techniques that we will apply to well-preserved 2.7-2.8 billion-year-old rocks in Western Australia. We will couple that approach to the use of the latest genetic techniques to reveal the origins of living cyanobacteria.Read moreRead less
Organic geochemistry of the McArthur River hydrothermal deposit. Exploration for hydrothermal ore deposits in sedimentary basins has many problems because of the lack of any general agreement on the mechanisms of formation of major deposits. This proposed research will focus on the fundamental issue of the interaction of organic matter and mineralizing fluids in contributing to ore mineral deposition. Given that the McArthur River orebody is an exquisitely preserved example of a hydrothermal dep ....Organic geochemistry of the McArthur River hydrothermal deposit. Exploration for hydrothermal ore deposits in sedimentary basins has many problems because of the lack of any general agreement on the mechanisms of formation of major deposits. This proposed research will focus on the fundamental issue of the interaction of organic matter and mineralizing fluids in contributing to ore mineral deposition. Given that the McArthur River orebody is an exquisitely preserved example of a hydrothermal deposit it will thus enable a comprehensive organic geochemical investigation to elucidate the role of organic matter in ore formation. The outcomes will benefit the Australian mineral exploration industry by refining current ore genesis models.Read moreRead less
A terrestrial hot spring setting for the origin of life. This project aims to test the proposal that a terrestrial hot spring field could have been the setting for the origin of life, in preference over the currently favoured site at deep sea vents. The project will involve an integrated, and multi-disciplinary study of the rocks, fluids, and molecules that together make up ancient to modern hot spring systems, and experiments on prebiotic organic chemistry using early Earth materials. Results w ....A terrestrial hot spring setting for the origin of life. This project aims to test the proposal that a terrestrial hot spring field could have been the setting for the origin of life, in preference over the currently favoured site at deep sea vents. The project will involve an integrated, and multi-disciplinary study of the rocks, fluids, and molecules that together make up ancient to modern hot spring systems, and experiments on prebiotic organic chemistry using early Earth materials. Results will be used to develop a terrestrial origin of life setting and assist in the search for life on Mars.Read moreRead less
Ancient weather stations of Australia: charting a continent's descent into aridity and its ecological consequences. Australia has an enviable reputation as a leading innovator in geochronological and geochemical studies and this research will reinforce that standing. The outcomes will promote a better understanding of Australia's arid continent, contribute to studies of global climate change, and provide new insights into the response of ecosystems to such events. In these ways, the project addr ....Ancient weather stations of Australia: charting a continent's descent into aridity and its ecological consequences. Australia has an enviable reputation as a leading innovator in geochronological and geochemical studies and this research will reinforce that standing. The outcomes will promote a better understanding of Australia's arid continent, contribute to studies of global climate change, and provide new insights into the response of ecosystems to such events. In these ways, the project addresses directly our current national research priorities 'water - a critical resource', 'responding to climate change and variability' and 'the sustainable use of Australia's biodiversity'.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE160100628
Funder
Australian Research Council
Funding Amount
$368,394.00
Summary
Dissolved organic carbon quality influences metal toxicity in freshwaters. This project aims to characterise the types of dissolved organic carbon (DOC) found within Australian freshwaters and investigate how these influence metal toxicity to organisms. DOC has the ability to decrease the toxicity of metals to organisms in natural waters, and the intensity of the decrease is related to the type of DOC. Information regarding the types of DOC commonly found within Australian waters is lacking, and ....Dissolved organic carbon quality influences metal toxicity in freshwaters. This project aims to characterise the types of dissolved organic carbon (DOC) found within Australian freshwaters and investigate how these influence metal toxicity to organisms. DOC has the ability to decrease the toxicity of metals to organisms in natural waters, and the intensity of the decrease is related to the type of DOC. Information regarding the types of DOC commonly found within Australian waters is lacking, and their impact on metal toxicity to Australian biota is unknown. This project aims to characterise DOC from different Australian ecoregions and investigate the influence of different DOCs on metal toxicity. The expected outcomes are better predictive toxicity models and better assessment of risks associated with metal contamination.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0668345
Funder
Australian Research Council
Funding Amount
$390,700.00
Summary
A highly sensitive mass spectrometer for trace analysis of biomarker molecules to study changes in recent and ancient environments. Maintaining the quality of water and soil is a critically important issue for Australia's economic and social development. To be able to predict and plan the future of our natural assets, it is critical to understand their ecological past and their state before and after European settlement. We will utilize the new instrument to develop and apply innovative technolo ....A highly sensitive mass spectrometer for trace analysis of biomarker molecules to study changes in recent and ancient environments. Maintaining the quality of water and soil is a critically important issue for Australia's economic and social development. To be able to predict and plan the future of our natural assets, it is critical to understand their ecological past and their state before and after European settlement. We will utilize the new instrument to develop and apply innovative technologies providing Australia with new knowledge about the causes and effects of toxic cyanobacterial blooms, eutrophication, and contamination of reservoirs by bush-fires. The new facility will also supply advanced oil fingerprinting techniques to the petroleum industry minimizing exploration risk and increasing the chance of the discovery of new oil deposits.Read moreRead less