Forecasting live fuel moisture content, the on/off switch for forest fire. Dry forest fuels are a precursor of large bushfires. This research aims to develop, for the first time, a model to reliably forecast the moisture content of live fuels (e.g. the foliage and fine branches of shrubs and trees). This will be achieved by combining (i) satellite-derived estimates of live fuel moisture content, (ii) forecasts of soil moisture, and (iii) plant physiological responses to soil dryness. Forecasts o ....Forecasting live fuel moisture content, the on/off switch for forest fire. Dry forest fuels are a precursor of large bushfires. This research aims to develop, for the first time, a model to reliably forecast the moisture content of live fuels (e.g. the foliage and fine branches of shrubs and trees). This will be achieved by combining (i) satellite-derived estimates of live fuel moisture content, (ii) forecasts of soil moisture, and (iii) plant physiological responses to soil dryness. Forecasts of live fuel moisture content will deliver an early warning system of the risk of bushfires. These forecasts will also facilitate improved planning of prescribed burns: if fuels are too dry there is a risk of burns escaping, conversely, if fuels are too wet there is a risk that burns will fail to meet objectives.Read moreRead less
Are evolutionary refugia traps for endemic species? This project aims to determine whether species that have small geographic ranges and which live in historically stable refugia have evolved narrow climatic tolerances. The project will compare such species with more widespread, related species living in the same areas and combine field- and lab-based estimates of physiological tolerances with genomic estimates of population history and diversity. The expected outcome is to test the prediction f ....Are evolutionary refugia traps for endemic species? This project aims to determine whether species that have small geographic ranges and which live in historically stable refugia have evolved narrow climatic tolerances. The project will compare such species with more widespread, related species living in the same areas and combine field- and lab-based estimates of physiological tolerances with genomic estimates of population history and diversity. The expected outcome is to test the prediction from evolutionary theory that small-range, refugial species are intrinsically more sensitive to climatic change. The project expects to provide improved guidance for ecological management of biodiversity hotspots.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100900
Funder
Australian Research Council
Funding Amount
$426,718.00
Summary
When and where are temperate reef communities vulnerable to ocean warming? This project will test in the laboratory and the field, when and where ocean warming will exceed the thermal limits of marine species and why certain species show greater sensitivity to warming temperatures than others. This project expects to generate robust estimates about how temperature sensitivity varies between populations across species’ ranges and identify the ecological implications for habitat loss in areas wher ....When and where are temperate reef communities vulnerable to ocean warming? This project will test in the laboratory and the field, when and where ocean warming will exceed the thermal limits of marine species and why certain species show greater sensitivity to warming temperatures than others. This project expects to generate robust estimates about how temperature sensitivity varies between populations across species’ ranges and identify the ecological implications for habitat loss in areas where thermal limits differ between key species. Expected outcomes include an enhanced capacity to detect when and where vulnerability hotspots will emerge that could jeopardise the immense social, ecological, and economic value of Australia’s temperate reefs, next to which 70% of Australians live, along 8,000 km of coastline.Read moreRead less
Diatom silica production under future ocean conditions, genes to biomes. This project aims to quantify how ocean warming and acidification will alter natural diatom assemblages and silica production rates to predict changes in the cycling and transfer of carbon and silicon in the future ocean. This project expects to generate new knowledge of environmental controls on diatom silicification and their ocean-scale implications by integrating the disciplines of physiology, molecular biology and quan ....Diatom silica production under future ocean conditions, genes to biomes. This project aims to quantify how ocean warming and acidification will alter natural diatom assemblages and silica production rates to predict changes in the cycling and transfer of carbon and silicon in the future ocean. This project expects to generate new knowledge of environmental controls on diatom silicification and their ocean-scale implications by integrating the disciplines of physiology, molecular biology and quantitative modelling. Expected outcomes include essential advancements in future simulations of marine productivity and silicon cycling and a deeper understanding of threats to marine life from climate change. This should provide significant benefits such as improved valuations on the sustainability of ocean ecosystems.Read moreRead less
Maintenance of high plant diversity in phosphorus-impoverished ecosystems. This project aims to determine the role of soil-inhabiting pathogens and symbiotic fungi in the maintenance of plant diversity in Australia’s hyperdiverse shrublands. These are among the world’s most species-rich systems, yet occur on extremely poor soils. This project tests the hypothesis that plants that are best adapted to acquire phosphorus in these extremely infertile soils are most susceptible to soil pathogens. Thi ....Maintenance of high plant diversity in phosphorus-impoverished ecosystems. This project aims to determine the role of soil-inhabiting pathogens and symbiotic fungi in the maintenance of plant diversity in Australia’s hyperdiverse shrublands. These are among the world’s most species-rich systems, yet occur on extremely poor soils. This project tests the hypothesis that plants that are best adapted to acquire phosphorus in these extremely infertile soils are most susceptible to soil pathogens. This trade-off would equalise differences in competitive abilities among plant species and promote high plant diversity. The project will help elucidate how pathogens and symbiotic fungi together drive plant diversity in a globally significant biodiversity hotspot in Australia, with relevance to other biodiverse regions.Read moreRead less
Understanding the survival of forests under drought . Droughts are predicted to become more extreme in the near future, with potentially devastating impacts on Australian forest ecosystems. This project aims to address key knowledge gaps in our understanding of how plants tolerate extreme drought stress and utilise this new knowledge to improve vegetation models suitable for assessing ecosystem vulnerability. We will use innovative experimental methodology to determine the processes by which wat ....Understanding the survival of forests under drought . Droughts are predicted to become more extreme in the near future, with potentially devastating impacts on Australian forest ecosystems. This project aims to address key knowledge gaps in our understanding of how plants tolerate extreme drought stress and utilise this new knowledge to improve vegetation models suitable for assessing ecosystem vulnerability. We will use innovative experimental methodology to determine the processes by which water transport breaks down in roots, stems and leaves and the mechanisms governing recovery from severe drought stress. The project will provide a deeper understanding of drought tolerance in trees, improved forecasting of risks to native vegetation, and enhanced management of native forest resources. Read moreRead less
Pushing the envelope: does range size limit eucalypt tolerance to warming? This project aims to characterise the biogeographic constraints on the physiological flexibility of eucalypts to accommodate climate warming. Do temperature tolerances of diverse taxa vary predictably with native geographic range sizes and climate of origin? In addressing this question, the project expects to generate new knowledge on the comparative physiological responses of diverse eucalypt taxa to warming and heat wav ....Pushing the envelope: does range size limit eucalypt tolerance to warming? This project aims to characterise the biogeographic constraints on the physiological flexibility of eucalypts to accommodate climate warming. Do temperature tolerances of diverse taxa vary predictably with native geographic range sizes and climate of origin? In addressing this question, the project expects to generate new knowledge on the comparative physiological responses of diverse eucalypt taxa to warming and heat waves using controlled-environment studies and a unique facility at Western Sydney University for heat wave studies of large trees. Expected outcomes include an enhanced capacity to predict carbon exchange and growth responses of native trees to climate warming over large geographic scales.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100649
Funder
Australian Research Council
Funding Amount
$415,416.00
Summary
Green or crispy: Which plants use transpiration to survive heatwaves? Heatwaves are increasing in frequency and intensity, and extreme heat poses a significant threat to tree growth and survival. This project aims to investigate how different Australian tree species respond to extreme heat by tracking dynamic changes in water use during both natural and experimental heatwaves, representing current and future stress levels. Identification of a predictable response among plant functional types cou ....Green or crispy: Which plants use transpiration to survive heatwaves? Heatwaves are increasing in frequency and intensity, and extreme heat poses a significant threat to tree growth and survival. This project aims to investigate how different Australian tree species respond to extreme heat by tracking dynamic changes in water use during both natural and experimental heatwaves, representing current and future stress levels. Identification of a predictable response among plant functional types could be used to better forecast the potential effects of climate change on forest ecosystems. This project also expects to identify heat-tolerant tree species and their relevant physiological traits, which can improve the success of urban tree plantings to help create cooler, greener cities throughout Australia.Read moreRead less
Unlocking telomere effects on life, death and fitness in a warming world. Few things in biology provoke such a strong desire for understanding as when adult death and fatal disease can be predicted early in life. A common factor linking early life stress, disease, ageing and time of death are telomeres, the protective regions at the end of each chromosome. This project aims to explicitly link telomere dynamics in free-living ectotherm populations with experimental approaches to advance our under ....Unlocking telomere effects on life, death and fitness in a warming world. Few things in biology provoke such a strong desire for understanding as when adult death and fatal disease can be predicted early in life. A common factor linking early life stress, disease, ageing and time of death are telomeres, the protective regions at the end of each chromosome. This project aims to explicitly link telomere dynamics in free-living ectotherm populations with experimental approaches to advance our understanding of parental and environmental effects on offspring telomeres and their effects later in life. This project will take advantage of one of the world’s longest datasets on ectotherm responses to climate to provide new knowledge of how telomeres affect fitness and the role that the environment plays.Read moreRead less
Reef Breath Testing (RBT): exhaled volatile-gas biomarkers of coral health. This Project aims to uncover volatile gas "fingerprints" of coral reef taxa and how they are diagnostic of healthy reef functioning over space and time. All organisms emit distinct volatile gases via physiological fine-tuning and signalling as their environments change. Whilst coral reef taxa and coral reefs are hotspots for volatile gas emissions, which gases are produced, when and why, is entirely unexplored. This proj ....Reef Breath Testing (RBT): exhaled volatile-gas biomarkers of coral health. This Project aims to uncover volatile gas "fingerprints" of coral reef taxa and how they are diagnostic of healthy reef functioning over space and time. All organisms emit distinct volatile gases via physiological fine-tuning and signalling as their environments change. Whilst coral reef taxa and coral reefs are hotspots for volatile gas emissions, which gases are produced, when and why, is entirely unexplored. This project unites a multidisciplinary team of experts to, for the first time, couple volatile gas assessment, metabolic physiology and functional genomics techniques to transform understanding of how key volatile gases underpin coral resilience to stress and disease, which is essential to improve coral reef ecosystem management.Read moreRead less