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
How evolution is constrained by trade-offs between the multiplication and survival of organisms. The negative correlation between reproduction (production of large numbers of progeny) and survival (resistance to external challenges) is a crucial trade-off that limits the evolution of perfect organisms. Such trade-offs are extremely difficult to study in closely controlled experiments because of the complexities in biological organisation and life-cycles. This project will explore trade-offs usin ....How evolution is constrained by trade-offs between the multiplication and survival of organisms. The negative correlation between reproduction (production of large numbers of progeny) and survival (resistance to external challenges) is a crucial trade-off that limits the evolution of perfect organisms. Such trade-offs are extremely difficult to study in closely controlled experiments because of the complexities in biological organisation and life-cycles. This project will explore trade-offs using a novel synthetic biology strategy. Genes in bacteria will be engineered to produce strains with a range of fixed but different trade-off settings. The strain sets will allow unprecedented analysis of reproduction-survival trade-offs and testing of important models of how trade-offs control fitness and evolutionary outcomes.Read moreRead less
From genes to ecosystems: does genetic divergence in eucalyptus alter biodiversity and ecosystem function? The project will use a dominant tree species of south-eastern Australia to examine how genetic based variation in its traits influences community organisation, biodiversity and ecosystem processes. Outcomes from this research will be important for responding to an uncertain future environment and maintaining the services ecosystems provide.
Fine-scale resolution of genomes in natural microbial communities. This project aims to develop advanced molecular and statistical techniques to precisely resolve the genomes of microbes in the environment. Microbes inhabit every niche on the planet and are fundamental to human and animal health, agriculture, and the environment. The proposed technology will advance our understanding of environmental microbes, leading to advances in areas like climate science and biosecurity where microbes play ....Fine-scale resolution of genomes in natural microbial communities. This project aims to develop advanced molecular and statistical techniques to precisely resolve the genomes of microbes in the environment. Microbes inhabit every niche on the planet and are fundamental to human and animal health, agriculture, and the environment. The proposed technology will advance our understanding of environmental microbes, leading to advances in areas like climate science and biosecurity where microbes play a key role. It will also support the development of billion dollar industries focused on the use of beneficial microbes in agriculture, plant, animal, and human health.Read moreRead less
Tracking origins and spread of Crown-of-Thorns Seastars on the Great Barrier Reef. This proposal aims to uncover the source reefs for Crown-of-Thorns Seastars (CoTS) outbreaks and the main routes of spread through the Great Barrier Reef. Coral eating CoTS pose a significant threat to the Great Barrier Reef. Using population genomics, invasive species genetics, and epidemiology and drawing upon extensive collections of adults and larvae dating from the 1980’s onwards, this project will test promi ....Tracking origins and spread of Crown-of-Thorns Seastars on the Great Barrier Reef. This proposal aims to uncover the source reefs for Crown-of-Thorns Seastars (CoTS) outbreaks and the main routes of spread through the Great Barrier Reef. Coral eating CoTS pose a significant threat to the Great Barrier Reef. Using population genomics, invasive species genetics, and epidemiology and drawing upon extensive collections of adults and larvae dating from the 1980’s onwards, this project will test prominent hypotheses about outbreak origins and subsequent spatial spread of CoTS via larval dispersal. The project expects to clarify the locations and timing of long distance dispersal pathways and to test whether larval detection near reefs can provide an early warning for local outbreaks on these same reefs.Read moreRead less
Predicting adaptation and range expansion under climate change. This project investigates the repeatability and thereby the predictability of adaptation to climate change by leveraging 1000 genomes sampled over 150 years and multiple climatic gradients in the rapidly adapting, globally invasive, and highly allergenic ragweed. We expect to deepen our understanding of the genetic basis of adaptation and decipher the circumstances under which adaptive genetic change is repeatable, by integrating a ....Predicting adaptation and range expansion under climate change. This project investigates the repeatability and thereby the predictability of adaptation to climate change by leveraging 1000 genomes sampled over 150 years and multiple climatic gradients in the rapidly adapting, globally invasive, and highly allergenic ragweed. We expect to deepen our understanding of the genetic basis of adaptation and decipher the circumstances under which adaptive genetic change is repeatable, by integrating a novel evolutionary model with genomic data. We will develop the capacity to predict species’ distributions and trait evolution under climate change using a powerful empirical dataset. This will provide us with the capacity to anticipate and manage the effects of climate change on noxious and threatened species.Read moreRead less
The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce ....The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce gene flow between neighbouring populations and to explain how expression of the gene is regulated. Further, because clonal reproduction often leads to invasiveness in social insects - a dangerous outcome - understanding the origins of virgin birth is also critical to understanding invasiveness.Read moreRead less
Asexual reproduction in honey bee invaders. This project aims to determine whether thelytokous parthenogenesis (the ability of queens and workers to clone themselves) is a critical factor in the successful establishment of invasive social insects in Australia and elsewhere. When an exotic social insect species arrives in Australia the population will usually expire due to a lack of conspecifics for mating, and severe inbreeding. Nonetheless, a few ant, bee and wasp species have managed to estab ....Asexual reproduction in honey bee invaders. This project aims to determine whether thelytokous parthenogenesis (the ability of queens and workers to clone themselves) is a critical factor in the successful establishment of invasive social insects in Australia and elsewhere. When an exotic social insect species arrives in Australia the population will usually expire due to a lack of conspecifics for mating, and severe inbreeding. Nonetheless, a few ant, bee and wasp species have managed to establish here and are among our worst invasive animals. The project plans to show how the Asian hive bee became established in Queensland and to assess the risks it poses to industry and the environment. This research should help the nation to respond more effectively to the next social insect invader.Read moreRead less
Some like it hot: invasive species, hybridisation, and a warming world. Temperatures are rising and invasive species are becoming more prevalent. This project aims to understand how climate change and hybridisation between exotic and native marine species leads to rapid adaptation. Using integrative approaches from genomics and physiology and focusing on Australian blue mussels, this proposal will test leading hypotheses about how climate change and hybridisation can enable rapid adaptation and ....Some like it hot: invasive species, hybridisation, and a warming world. Temperatures are rising and invasive species are becoming more prevalent. This project aims to understand how climate change and hybridisation between exotic and native marine species leads to rapid adaptation. Using integrative approaches from genomics and physiology and focusing on Australian blue mussels, this proposal will test leading hypotheses about how climate change and hybridisation can enable rapid adaptation and the spread of exotic species. Outcomes will include strategies for minimising impacts of invasive mussels and boosting warm-temperature adaptation in aquaculture mussels and restored shellfish reefs. This project will yield fundamental insights into how marine species can quickly adapt to warming seas.Read moreRead less
When is hybridisation helpful or harmful to invaders? This project aims to determine the role of hybridisation during biological invasions. Hybridisation has been thought to aid invasion by introducing genetic novelty, but traditional approaches have been ineffective at evaluating alternatives. The project will capitalise on replicate hybrid zones of the same species, apply new methods on an expansive genomic dataset, and develop novel simulations to resolve how hybridisation and colonisation in ....When is hybridisation helpful or harmful to invaders? This project aims to determine the role of hybridisation during biological invasions. Hybridisation has been thought to aid invasion by introducing genetic novelty, but traditional approaches have been ineffective at evaluating alternatives. The project will capitalise on replicate hybrid zones of the same species, apply new methods on an expansive genomic dataset, and develop novel simulations to resolve how hybridisation and colonisation interact. The methods and knowledge acquired through this research will be valuable for a range of applications, from biosecurity to conservation management.Read moreRead less