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Neurogenesis in bilateral larval and radial adult body plans: identification of echinoderm homologues of the chordate central nervous system. The modern synthesis of embryology and gene expression studies, as undertaken in this project with sea stars, is a major way forward to achieve advances in our understanding of animal evolution and generate new insights into the mystery that surrounds the origin of our own phylum, the Chordata. This project utilises life history diversity in species that a ....Neurogenesis in bilateral larval and radial adult body plans: identification of echinoderm homologues of the chordate central nervous system. The modern synthesis of embryology and gene expression studies, as undertaken in this project with sea stars, is a major way forward to achieve advances in our understanding of animal evolution and generate new insights into the mystery that surrounds the origin of our own phylum, the Chordata. This project utilises life history diversity in species that are unique Australian fauna. Extreme life history diversity as seen in these sea stars is unparalleled on a global scale and provides an important resource to generate new discoveries on the processes underlying evolution in the sea and enhance our understanding of marine systems. Read moreRead less
The diversity and assembly of optics in nature. Optics, such as the design of new coloured reflectors, is a research strength for Australia. A reason for this is the potential for application - optical devices can be found far and wide in our everyday lives, from security devices on banknotes (holograms), to computer monitors (LCDs). An interesting parallel exists in nature - animals possess similar optical devices to those we use. So it makes sense to examine the animals' devices in a search fo ....The diversity and assembly of optics in nature. Optics, such as the design of new coloured reflectors, is a research strength for Australia. A reason for this is the potential for application - optical devices can be found far and wide in our everyday lives, from security devices on banknotes (holograms), to computer monitors (LCDs). An interesting parallel exists in nature - animals possess similar optical devices to those we use. So it makes sense to examine the animals' devices in a search for new reflectors, and that's an aim of this project. And since reflectors are often difficult to make, why not let animals make reflectors for us? That is a further aim of this project. Soon we may have genetically-altered butterfly scales embedded in our credit cards that cannot be counterfeited.Read moreRead less
Development and calcification in benthic marine invertebrates (Mollusca and Echinodermata) in an acidified and warm ocean. As an island continent Australia generates considerable wealth from its oceans with marine invertebrate resources playing a key role. These resources are at risk due to the impact of climate change, ocean acidification and warming, on availability of carbonate minerals for shell production. Of major concern is potential recruitment failure if planktonic larvae cannot produc ....Development and calcification in benthic marine invertebrates (Mollusca and Echinodermata) in an acidified and warm ocean. As an island continent Australia generates considerable wealth from its oceans with marine invertebrate resources playing a key role. These resources are at risk due to the impact of climate change, ocean acidification and warming, on availability of carbonate minerals for shell production. Of major concern is potential recruitment failure if planktonic larvae cannot produce their skeleton and if benthic stages cannot grow due to impaired skeleton formation. This project addresses uncertainties in knowledge of the response of ecologically and commercially important marine biota to climate change, knowledge crucial to inform risk assessment of future changes to our marine resources.Read moreRead less
More than mud: how will disruption of soft-sediments threaten coastal biodiversity? Habitat destruction and increased nutrient input are combining with climate change to threaten the biodiversity and fisheries productivity of soft sediment habitats that dominate Australia's sixteen million square kilometre exclusive economic zone. This project will develop the tools necessary for the sustainable management of our coastal biodiversity under multiple scenarios of change. Because many of the result ....More than mud: how will disruption of soft-sediments threaten coastal biodiversity? Habitat destruction and increased nutrient input are combining with climate change to threaten the biodiversity and fisheries productivity of soft sediment habitats that dominate Australia's sixteen million square kilometre exclusive economic zone. This project will develop the tools necessary for the sustainable management of our coastal biodiversity under multiple scenarios of change. Because many of the results will be broadly applicable to coastal systems worldwide, this project will generate high-impact publications that will increase the research profile of Australia. It will train postgraduate students in strategies to help ensure the sustainable use of our biodiversity and will generate collaborations with leading international scientists.Read moreRead less
Modes of speciation in subterranean diving beetles from calcrete aquifers of central Western Australia. Understanding speciation is a fundamental biological problem and our analyses of the diving beetles will broaden our understanding of modes of speciation and how an extraordinary biodiversity of subterranean animals (stygofauna) evolved in the limestone aquifers of central WA. The aquifers are an important source of water for pastoralists and mining companies and the limestone is also a valuab ....Modes of speciation in subterranean diving beetles from calcrete aquifers of central Western Australia. Understanding speciation is a fundamental biological problem and our analyses of the diving beetles will broaden our understanding of modes of speciation and how an extraordinary biodiversity of subterranean animals (stygofauna) evolved in the limestone aquifers of central WA. The aquifers are an important source of water for pastoralists and mining companies and the limestone is also a valuable resource, so there is a need for further research on the impacts of these uses. We will generate further knowledge of the diversity and biological significance of the stygofauna, information that is critical for the environmentally sustainable management of the aquifers and their ecosystems. Read moreRead less
Development of Australian model systems for speciation research. Our project will contribute to an understanding of the process of speciation, a fundamental biological problem, for which there are few well-developed model systems in the world. We will further our understanding of how Australia's extraordinary diversity of animal species have evolved, knowledge which is valuable for understanding the future impact of climatic and environmental changes on species. Our research will generate furthe ....Development of Australian model systems for speciation research. Our project will contribute to an understanding of the process of speciation, a fundamental biological problem, for which there are few well-developed model systems in the world. We will further our understanding of how Australia's extraordinary diversity of animal species have evolved, knowledge which is valuable for understanding the future impact of climatic and environmental changes on species. Our research will generate further knowledge of the diversity and biological significance of subterranean fauna in the arid zone of Australia, providing important background data for assessing the impacts of mining activities on groundwater-dependent-ecosystems and improved strategies for their sustainable management. Read moreRead less
The evolution of caste determination systems in termites. Termites cause around a billion dollars of damage in Australia each year. To date, all this damage is from native species, but there is the constant threat of invasion by voracious exotics. This project will provide fundamental knowledge on the mechanism termites use to produce the distinctive worker and royal castes, and on the way colony budding arises via juvenile reproduction. This will provide the basis for novel and highly specific ....The evolution of caste determination systems in termites. Termites cause around a billion dollars of damage in Australia each year. To date, all this damage is from native species, but there is the constant threat of invasion by voracious exotics. This project will provide fundamental knowledge on the mechanism termites use to produce the distinctive worker and royal castes, and on the way colony budding arises via juvenile reproduction. This will provide the basis for novel and highly specific termite control methods that target caste determination. The existence of sterile, altruistic castes famously posed a conundrum for Darwin. This project is ground-breaking because it will provide the critical link between the theory that explains the puzzle (kin selection) and molecular biology.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
Predicting co-extinction risk of invertebrates on endangered plants. Co-extinction occurs when a dependent species goes extinct with the loss of its host species. A recent overseas modelling study suggested losses to global biodiversity through this mechanism may be high, but only when a large number of hosts are extinguished. However, estimates were constrained because there are no datasets with insects sampled from endangered plants. Thus, the accuracy of the estimates remains unknown, particu ....Predicting co-extinction risk of invertebrates on endangered plants. Co-extinction occurs when a dependent species goes extinct with the loss of its host species. A recent overseas modelling study suggested losses to global biodiversity through this mechanism may be high, but only when a large number of hosts are extinguished. However, estimates were constrained because there are no datasets with insects sampled from endangered plants. Thus, the accuracy of the estimates remains unknown, particularly for Australian insects. This project will provide the most accurate estimate to date by sampling endangered plants and identify management strategies for sustaining viable populations of endangered insects, thereby conserving Australia's biodiversity.Read moreRead less