Diet influences the selective advantage of mitochondrial DNA mutations. This project aims to examine critical mechanisms that affect mitochondrial DNA variation within species. It aims to test the hypothesis that mitochondrial DNA haplotypes have the potential to be under nutritionally induced balancing selection as a consequence of cellular signalling and/or Adenosine triphosphate (ATP) production by mitochondria. Diet can vary both seasonally and geographically and is a key environmental param ....Diet influences the selective advantage of mitochondrial DNA mutations. This project aims to examine critical mechanisms that affect mitochondrial DNA variation within species. It aims to test the hypothesis that mitochondrial DNA haplotypes have the potential to be under nutritionally induced balancing selection as a consequence of cellular signalling and/or Adenosine triphosphate (ATP) production by mitochondria. Diet can vary both seasonally and geographically and is a key environmental parameter that influences the ability of a species to colonise new habitats. The project plans to characterise the functional links between specific mitochondrial DNA haplotypes, mitochondrial functions and organismal traits. The expected outcome is a more precise grasp of the processes influencing genetic variation within and among species, which would inform current issues in ecology and genetics.Read moreRead less
Why do only some exotics become invasive? Combining ecological and genomic approaches to address alternative hypotheses in a recent Australian weed. This project will specifically test alternative hypotheses about how weeds become invasive. As invasive weeds affect both agricultural and native ecosystems equally, research on understanding the mechanisms of weed invasion is critical. Outcomes will benefit Australia by allowing better prioritisation of management against exotic plants already i ....Why do only some exotics become invasive? Combining ecological and genomic approaches to address alternative hypotheses in a recent Australian weed. This project will specifically test alternative hypotheses about how weeds become invasive. As invasive weeds affect both agricultural and native ecosystems equally, research on understanding the mechanisms of weed invasion is critical. Outcomes will benefit Australia by allowing better prioritisation of management against exotic plants already in the country by providing predictive tools to estimate likelihood of spread. For formal Pest Risk Analysis by regulators (eg Biosecurity Australia), our project will provide genomic tools by which the potential weediness of a regulated plant can be assessed through genetic screening, and forms part of an international effort to identify 'weedy genes'. Read moreRead less
Population structure in the giant Australian cuttlefish - implications for management of a unique eco-tourism and fishery resource in regional Australia. A management strategy for the giant Australian cuttlefish in regional South Australia is required urgently because of potential conflict between ecotourism and fishery sectors. At present, development of a management strategy is stymied by lack of information on stock structure and movements. Analyses of variation in gene frequencies, morphom ....Population structure in the giant Australian cuttlefish - implications for management of a unique eco-tourism and fishery resource in regional Australia. A management strategy for the giant Australian cuttlefish in regional South Australia is required urgently because of potential conflict between ecotourism and fishery sectors. At present, development of a management strategy is stymied by lack of information on stock structure and movements. Analyses of variation in gene frequencies, morphometric and chemical trace element profiles in calcified structures among locations and years will enable the geographic extent of populations or stocks to be determined, including whether natal homing occurs. Such information is critical to sustainable management of the species and design of a marine protected area in the upper Spencer Gulf.Read moreRead less
Ecology, Physiology and Phylogeography: an integrated approach to the study of the invasive marine green macroalga Caulerpa taxifolia in Australia. The green marine macroalga Caulerpa taxifolia is one of the world's worst invasive species. In Australia 'exotic strains' of this alga are a listed pest species. Invasions in NSW and SA have caused environmental harm and managing them has cost $10 million since 2000. We propose to integrate ecology, physiology and genetic analyses to provide data to ....Ecology, Physiology and Phylogeography: an integrated approach to the study of the invasive marine green macroalga Caulerpa taxifolia in Australia. The green marine macroalga Caulerpa taxifolia is one of the world's worst invasive species. In Australia 'exotic strains' of this alga are a listed pest species. Invasions in NSW and SA have caused environmental harm and managing them has cost $10 million since 2000. We propose to integrate ecology, physiology and genetic analyses to provide data to better respond to this pest, potentially savings millions of dollars per year. We will produce the first empirical evidence of the effects of climate change and ocean acidification on this marine pest, in the context of increasing coastal human populations.Read moreRead less
Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raise ....Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raises the question whether the VLP1 gene locus is genetically associated with the phenotype. We will investigate the genetic basis for the observed phenotypic differences, by comparing the two thelytokous lines with the corresponding homozygous VLP1-genotypes in sexual strains. The outcome will provide a molecular and genetic framework to test parthenogenetic reproduction strategies in some insect species.Read moreRead less
Establishing genetic guidelines for the effective ecological restoration of seagrass meadows. Industry and coastal development in Australia are of national importance for economic growth and prosperity, but they threaten benthic habitats, like seagrasses. Loss of seagrass meadows without mitigation results in greater coastal impacts from damaging storms and waves and a reduction in the health and productivity of marine environments globally. Thus the ecological restoration of seagrass meadows is ....Establishing genetic guidelines for the effective ecological restoration of seagrass meadows. Industry and coastal development in Australia are of national importance for economic growth and prosperity, but they threaten benthic habitats, like seagrasses. Loss of seagrass meadows without mitigation results in greater coastal impacts from damaging storms and waves and a reduction in the health and productivity of marine environments globally. Thus the ecological restoration of seagrass meadows is an urgent national priority action that involves industry, government and the community. Through the detailed assessment of population genetic variation and key population processes in seagrasses, this project will establish genetic guidelines for a more effective seagrass restoration industry.Read moreRead less
Restoration genetics of five endangered fish species from the Murray-Darling Basin. Extended drought and environmental degradation have caused unprecedented loss of aquatic biodiversity in the Murray-Darling Basin (MDB), Australia's most important agricultural region. This project will reduce the risk of extinction of two endangered and three critically endangered freshwater fish species from the lower MDB. It will provide major benefits to the broader Australian community by addressing governme ....Restoration genetics of five endangered fish species from the Murray-Darling Basin. Extended drought and environmental degradation have caused unprecedented loss of aquatic biodiversity in the Murray-Darling Basin (MDB), Australia's most important agricultural region. This project will reduce the risk of extinction of two endangered and three critically endangered freshwater fish species from the lower MDB. It will provide major benefits to the broader Australian community by addressing government policies regarding sustainable water management in rural areas, biodiversity protection and recovery of threatened species. The study will also increase the research profile of Australia in the international scientific community by improving our understanding about genetic diversity in captive breeding and restoration programs.Read moreRead less
Development of genetic technology for rodent population suppression. Vertebrate pests cost Australia over $1 billion each year in agricultural losses and environmental damage and novel strategies are urgently required to tackle this massive challenge. Newly proposed “gene drives”, which might rapidly spread through populations, have enormous potential for the sustained management and even eradication of pests. Through innovative application of cutting-edge genome editing approaches, this proposa ....Development of genetic technology for rodent population suppression. Vertebrate pests cost Australia over $1 billion each year in agricultural losses and environmental damage and novel strategies are urgently required to tackle this massive challenge. Newly proposed “gene drives”, which might rapidly spread through populations, have enormous potential for the sustained management and even eradication of pests. Through innovative application of cutting-edge genome editing approaches, this proposal aims to develop gene drive technology in mice as a prototypical vertebrate pest species. We will also develop cutting-edge mathematical models of rodent gene drives to identify crucial parameters for efficacious employment and investigate potential for impact on non-target populations.Read moreRead less
Seascape genetics for shark management: an innovation in sustainable fisheries modelling. This project will use novel genetic, chemical and spatial modelling techniques to assess the long-term viability of bronze whaler and dusky shark fisheries in southern Australia. Results will be used to implement sustainable management of the fisheries to ensure persistence of these threatened sharks.
Subterranean invertebrate communities of arid zone Western Australia: diversity, assessment and food-web structure. The diverse and unique subterranean fauna associated with aquifers of the Western Australia arid zone is potentially threatened by water extraction, mining and other human impacts. This project aims to apply a powerful combination of molecular genetic analyses and compound specific isotope analyses to study, for the first time, the food web structure and source of energy of these g ....Subterranean invertebrate communities of arid zone Western Australia: diversity, assessment and food-web structure. The diverse and unique subterranean fauna associated with aquifers of the Western Australia arid zone is potentially threatened by water extraction, mining and other human impacts. This project aims to apply a powerful combination of molecular genetic analyses and compound specific isotope analyses to study, for the first time, the food web structure and source of energy of these groundwater ecosystems. The project aims to also develop novel procedures for monitoring their biodiversity using environmental DNA within the groundwater. The results will provide crucial information for the management of groundwater, and conservation of their associated ecosystems, and significantly improve the rigour of long-term environmental monitoring.Read moreRead less