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Evolution of defensive and predatory venom in cone snails. This project aims to determine the molecular and cellular origins and mechanisms regulating venom production and release to establish how defensive venoms evolved in cone snails. Cone snails possess a remarkable ability to rapidly and reversibly switch between separate venoms in response to predatory or defensive stimuli, implying that these are separately evolved and regulated mechanisms. The investigators hypothesise that defensive ven ....Evolution of defensive and predatory venom in cone snails. This project aims to determine the molecular and cellular origins and mechanisms regulating venom production and release to establish how defensive venoms evolved in cone snails. Cone snails possess a remarkable ability to rapidly and reversibly switch between separate venoms in response to predatory or defensive stimuli, implying that these are separately evolved and regulated mechanisms. The investigators hypothesise that defensive venoms, originally evolved in the proximal venom duct to protect against threats such as cephalopod and fish predation, have been repurposed in the proximal duct to allow predators to become prey, facilitating the switch from worm to mollusc and fish hunting. The project aims to show the broad implications for the evolution of venoms in animals and discover the regulatory mechanisms driving venom peptide expression.Read moreRead less
The evolution of specialised orchid pollination and its reversibility. This project aims to determine the changes in key floral volatile compounds underpinning pollination transitions, identify their molecular basis, and understand the ecological processes favouring reversals away from extreme specialisation. By focusing on pollination of sexually deceptive Australian orchids, this project would be the first to determine the molecular, chemical and behavioural basis of evolutionary reversals to ....The evolution of specialised orchid pollination and its reversibility. This project aims to determine the changes in key floral volatile compounds underpinning pollination transitions, identify their molecular basis, and understand the ecological processes favouring reversals away from extreme specialisation. By focusing on pollination of sexually deceptive Australian orchids, this project would be the first to determine the molecular, chemical and behavioural basis of evolutionary reversals to more generalised strategies in a group of plants facing high risk of pollinator extinction. The expected outcome, a mechanistic understanding of how pollination transitions occur, would be internationally ground-breaking, and provide crucial insights to protect this diverse but highly threatened group of plants.Read moreRead less
Understanding how reproduction and sexual conflict drive sex-dependent longevity and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how molecules, genes, hormones, tissues and cells interact during ageing. The evolutionary study of ageing is considered one of the success stories of the emerging field of evolutionary medicine, yet we desperately need greater integration of the evol ....Understanding how reproduction and sexual conflict drive sex-dependent longevity and ageing. The biological study of longevity and ageing has two important fronts: understanding how evolution shapes lifespan and ageing, and the mechanistic study of how molecules, genes, hormones, tissues and cells interact during ageing. The evolutionary study of ageing is considered one of the success stories of the emerging field of evolutionary medicine, yet we desperately need greater integration of the evolutionary and mechanistic spheres. This project addresses why males and females have different lifespans and age differently in a way that bridges evolutionary and mechanistic study, and will build Australia's research capacity to study ageing at both levels. Read moreRead less
Signal manipulation in orb-web spiders. A number of diverse orb-web spiders adorn their webs with conspicuous silk bands called decorations or stabilimenta. Their function remains controversial, but they may act as a visual signal to either attract prey, deter predators or prevent web damage by large non-prey animals. We will test these hypotheses on several Australian orb-web species using field and laboratory experiments. Furthermore, we will investigate the effect of web decorations on specie ....Signal manipulation in orb-web spiders. A number of diverse orb-web spiders adorn their webs with conspicuous silk bands called decorations or stabilimenta. Their function remains controversial, but they may act as a visual signal to either attract prey, deter predators or prevent web damage by large non-prey animals. We will test these hypotheses on several Australian orb-web species using field and laboratory experiments. Furthermore, we will investigate the effect of web decorations on species radiation and hence diversity using molecular techniques to establish phylogenies. This will, at least in part, help resolve this century old debate surrounding web decorations.Read moreRead less
A new class of sodium channel toxin from ant venoms . Ants are diverse and ubiquitous and the ability of certain species to sting is familiar to many of us. Yet we know remarkably little about the chemistry underlying these stings. We recently discovered that the venoms of ants, including common Australian species, harbour a novel and unique class of sodium channel toxins. Building on this discovery, the aim of this project will be to perform an in-depth characterisation of the effects of these ....A new class of sodium channel toxin from ant venoms . Ants are diverse and ubiquitous and the ability of certain species to sting is familiar to many of us. Yet we know remarkably little about the chemistry underlying these stings. We recently discovered that the venoms of ants, including common Australian species, harbour a novel and unique class of sodium channel toxins. Building on this discovery, the aim of this project will be to perform an in-depth characterisation of the effects of these toxins on sodium channels and to uncover the diversity and breadth of this toxin class in ant venoms. The outcome of this project will be novel insights into the chemistry of ant venoms and new insights into sodium channel function.Read moreRead less
Distinguishing among patterns of extinction and speciation through geological and climatic change: a molecular modelling approach. This research will enhance our understanding of the ancient origins of Australia's unique floral heritage. By developing new molecular modelling methods, it will strengthen Australia's position at the cutting edge of evolutionary phylogenetics. When Australia separated from Gondwana by continental drift 32 million years ago, the changed ocean circulation patterns tri ....Distinguishing among patterns of extinction and speciation through geological and climatic change: a molecular modelling approach. This research will enhance our understanding of the ancient origins of Australia's unique floral heritage. By developing new molecular modelling methods, it will strengthen Australia's position at the cutting edge of evolutionary phylogenetics. When Australia separated from Gondwana by continental drift 32 million years ago, the changed ocean circulation patterns triggered global climate change. The result was turnover of biota world-wide and dramatic changes within Australia. We will develop new insights into the rate and mode of these changes that will have international significance. Understanding the long-term turnover of flora from previous global climate changes will help to predict the impact of current and future climate change.Read moreRead less
The nature and consequences of environmentally-generated phenotypic variation in natural populations. The ambient environment can generate both heritable and non-heritable variation in individual traits, but the role of such variation in evolution is poorly understood. This project will use a powerful model organism, the Australian neriid flies, to elucidate the evolutionary implications of environmentally-generated variation.
Sociality and a sense of smell: receptor organ evolution in ants. This research provides novel insights into social recognition in insects by capitalising on a new technique to investigate the role of chemosensory detection of contact pheromones. The primary impact will be to ensure that Australia maintains its high research profile in this field, and by contributing to research training through supervising and mentoring research students. Finally, our research will contribute to our understand ....Sociality and a sense of smell: receptor organ evolution in ants. This research provides novel insights into social recognition in insects by capitalising on a new technique to investigate the role of chemosensory detection of contact pheromones. The primary impact will be to ensure that Australia maintains its high research profile in this field, and by contributing to research training through supervising and mentoring research students. Finally, our research will contribute to our understanding of the 'success' of major trans-global ant pest species, information that could prove useful in management strategies.Read moreRead less
Evolution in action or the demise of iconic Australian flora? The project aims to investigate the evolutionary history and conservation status of a group of closely related Grevillea species, in the light of increasing pressure from landscape modification. This project will incorporate leading methodologies for massively parallel sequencing, pollinator preference and breeding capacity in order to detect the patterns and processes underpinning divergence in widely distributed species. A phylogene ....Evolution in action or the demise of iconic Australian flora? The project aims to investigate the evolutionary history and conservation status of a group of closely related Grevillea species, in the light of increasing pressure from landscape modification. This project will incorporate leading methodologies for massively parallel sequencing, pollinator preference and breeding capacity in order to detect the patterns and processes underpinning divergence in widely distributed species. A phylogenetic framework will provide the evolutionary relationships among taxa. This project is expected to inform requirements for long-term species persistence and, for threatened species within the group, guide the decision making of biodiversity managers as to what actions are required and where best to invest limited funds.Read moreRead less
Conservation genomics of a critically endangered insect. This project aims to develop tools genotyping large animal genomes, focusing on the case of the Lord Howe Island stick insect, once thought to be extinct and now critically endangered. This project expects to generate molecular tools to monitor the genetic health the insect which has a large, complex and poorly understood genome. Expected outcomes include the development of a preservation and reintroduction strategy for the insect. This pr ....Conservation genomics of a critically endangered insect. This project aims to develop tools genotyping large animal genomes, focusing on the case of the Lord Howe Island stick insect, once thought to be extinct and now critically endangered. This project expects to generate molecular tools to monitor the genetic health the insect which has a large, complex and poorly understood genome. Expected outcomes include the development of a preservation and reintroduction strategy for the insect. This project will benefit ongoing conservation efforts, and is timely given the ongoing eradication of rats from Lord Howe Island where this species once lived. Read moreRead less