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Closing the carbon cycle: an ecological understanding of wood decay. The project aims to understand the controls on the return of carbon to the atmosphere within forests, especially focusing on this problem from a microbial perspective. Microbial dynamics and wood decay are crucially important for the global carbon cycle. What the field is lacking is a trait-based ecology of wood decomposers. The project plans to examine the interactions among fungal and oomycete endophytes and decomposers throu ....Closing the carbon cycle: an ecological understanding of wood decay. The project aims to understand the controls on the return of carbon to the atmosphere within forests, especially focusing on this problem from a microbial perspective. Microbial dynamics and wood decay are crucially important for the global carbon cycle. What the field is lacking is a trait-based ecology of wood decomposers. The project plans to examine the interactions among fungal and oomycete endophytes and decomposers through a series of experiments. The expected outcome of this project is a clear understanding of the role of traits in wood decomposer communities, especially their influence on priority effects, competitive hierarchies, and the resultant wood decay rate.Read moreRead less
Can ecological theory help to unravel microbial regulation of soil functions? Much attention has been paid to relationships between ecosystem health and biodiversity in above-ground communities, yet little notice is taken of the vast below-ground soil microbial communities. This project will reveal if soil microbial diversity is similarly important for ecosystem function in the face of future environmental challenges.
Chemical warfare at small scales: does eukaryotic chemical defense theory fit biofilms? The ecology of bacteria has long been treated separately from the ecology of higher organisms. Thus we do not know whether the ecology of bacteria operates by the same general rules as those of plants and animals. This significantly diminishes our understanding of the natural world, and our capacity to manage our environment. In this project we will systematically test ecological defense theories in bacterial ....Chemical warfare at small scales: does eukaryotic chemical defense theory fit biofilms? The ecology of bacteria has long been treated separately from the ecology of higher organisms. Thus we do not know whether the ecology of bacteria operates by the same general rules as those of plants and animals. This significantly diminishes our understanding of the natural world, and our capacity to manage our environment. In this project we will systematically test ecological defense theories in bacterial systems. Our aim is to merge our understanding of the ecology of these very different organisms. This integration of plant and animal ecology and environmental microbiology is new for both fields, and thus studies such as this one have the potential to put Australia at the forefront of this exciting new approach to our environment.Read moreRead less
Plant : fungal symbioses in Australian forests - new perspectives using laser microdissection. Ericaceae are important components of the Australian flora in many habitats, including forests and fragile alpine regions that are significant to Australia's cultural and natural heritage, and several species are considered threatened. This project addresses the fundamental question of whether networks of symbiotic fungal mycelia act as below-ground bridges between Ericaceae plants and tree roots. If d ....Plant : fungal symbioses in Australian forests - new perspectives using laser microdissection. Ericaceae are important components of the Australian flora in many habitats, including forests and fragile alpine regions that are significant to Australia's cultural and natural heritage, and several species are considered threatened. This project addresses the fundamental question of whether networks of symbiotic fungal mycelia act as below-ground bridges between Ericaceae plants and tree roots. If demonstrated, this would alter current views of carbon and nutrient cycling in Australian forests and provide the basis for better informed decisions for the sustainable management of Australian forest resources. This is particularly important in the context of carbon sequestration and future climate change.Read moreRead less
A novel process for removing phosphorus microbiologically from wastewater. Australia is a water limited continent, and its rivers and lakes are priceless assets, but because of climatic conditions, these are especially sensitive to blooms of 'blue green algae'. Some are highly toxic, and water containing them is unsuitable for most purposes. Current technology for P removal requires constructing complex plant configurations, and most of these operate unpredictably and unreliably. This project ....A novel process for removing phosphorus microbiologically from wastewater. Australia is a water limited continent, and its rivers and lakes are priceless assets, but because of climatic conditions, these are especially sensitive to blooms of 'blue green algae'. Some are highly toxic, and water containing them is unsuitable for most purposes. Current technology for P removal requires constructing complex plant configurations, and most of these operate unpredictably and unreliably. This project will develop and fully evaluate a revolutionarily different alternative with a fully aerobic system, capable of being added onto the end of a conventional treatment plant, making protection of rivers and streams simpler and more feasible. Read moreRead less
Biocontrol of foaming in activated sludge plants with bacteriophages. Activated sludge systems are the most widely used processes for treating wastewater in Australia. Yet most eventually suffer from episodes of bulking and foaming, where high levels of biosolids leave the plant with the treated waste, representing serious pollution hazards. Attempts to solve these problems have met with limited success.The highly novel biocontrol method proposed here will provide a specific, environmentally fri ....Biocontrol of foaming in activated sludge plants with bacteriophages. Activated sludge systems are the most widely used processes for treating wastewater in Australia. Yet most eventually suffer from episodes of bulking and foaming, where high levels of biosolids leave the plant with the treated waste, representing serious pollution hazards. Attempts to solve these problems have met with limited success.The highly novel biocontrol method proposed here will provide a specific, environmentally friendly and safe method to protect our rivers, streams and oceans form the harmful consequences of these problemsRead moreRead less
Function and application of novel proteins from sponge symbionts. This project aims to determine the function of eukaryotic-like proteins (ELPs) from bacterial symbionts of sponges and apply this knowledge to develop new tools for biotechnology. This project will use innovative microscopy techniques and gene expression studies to define the molecular and cellular interactions of ELPs with sponges and how this is influenced by changing environmental conditions. ELPs will be further used to create ....Function and application of novel proteins from sponge symbionts. This project aims to determine the function of eukaryotic-like proteins (ELPs) from bacterial symbionts of sponges and apply this knowledge to develop new tools for biotechnology. This project will use innovative microscopy techniques and gene expression studies to define the molecular and cellular interactions of ELPs with sponges and how this is influenced by changing environmental conditions. ELPs will be further used to create new, artificial interactions between bacteria and eukaryotes. This project will provide fundamental knowledge on the evolution and function of newly discovered ELPs found in both beneficial and pathogenic bacteria and paves the way to control symbiosis for biotechnological applications.Read moreRead less
Microbiology of Autothermal Thermophilic Aerobic Digester (ATAD) Systems for Biosolids Disposal in Wastewater Treatment Systems. The disposal of biosolids from wastewater treatment plants is expensive and troublesome. ATAD systems utilise microbes and are claimed to overcome many of the problems of more conventional disposal methods. Two have been installed in plants in central Victoria. However, virtually nothing is known about their microbiology. The study will determine which microbial popula ....Microbiology of Autothermal Thermophilic Aerobic Digester (ATAD) Systems for Biosolids Disposal in Wastewater Treatment Systems. The disposal of biosolids from wastewater treatment plants is expensive and troublesome. ATAD systems utilise microbes and are claimed to overcome many of the problems of more conventional disposal methods. Two have been installed in plants in central Victoria. However, virtually nothing is known about their microbiology. The study will determine which microbial populations are present and responsible for biosolids digestion, how these populations might change with changing operational conditions, and whether these changes in populations relate to production of odors. This information will enable these digesters to be better managed and operated.Read moreRead less
Antimicrobial defences in the evolution of sociality. Disease microorganisms were probably important selective agents during the evolution of most species. Social insects, the ants, bees, wasps and termites, may have been especially vulnerable because their colonies contain large numbers of closely related individuals living in close proximity; ideal conditions for contagious diseases. We will explore the evolution of antimicrobial defences in social insects and related groups. Social insects ....Antimicrobial defences in the evolution of sociality. Disease microorganisms were probably important selective agents during the evolution of most species. Social insects, the ants, bees, wasps and termites, may have been especially vulnerable because their colonies contain large numbers of closely related individuals living in close proximity; ideal conditions for contagious diseases. We will explore the evolution of antimicrobial defences in social insects and related groups. Social insects are important ecologically and economically and understanding their relationships with microbial diseases will facilitate their conservation and control. Knowledge of these interactions may also prove useful to human societies becoming increasingly vulnerable to disease.Read moreRead less
Antimicrobial Defences and Evolution of Sociality. Microbial diseases threaten all societies, human or otherwise. Insect societies present ideal conditions for contagious disease, specifically crowding of closely related individuals. We propose a gradient in the strength and breadth of antimicrobial defences from the solitary to the social condition and this is correlated with increasing crowding and decreasing genetic diversity. To test this hypothesis, we compare the microbial environments o ....Antimicrobial Defences and Evolution of Sociality. Microbial diseases threaten all societies, human or otherwise. Insect societies present ideal conditions for contagious disease, specifically crowding of closely related individuals. We propose a gradient in the strength and breadth of antimicrobial defences from the solitary to the social condition and this is correlated with increasing crowding and decreasing genetic diversity. To test this hypothesis, we compare the microbial environments of nests and colonies, and the antimicrobial mechanisms, of solitary, semi-social and social insects. Outcomes from this research on disease regulation will inform the use, management and conservation of these economically and ecologically important animals.Read moreRead less