Shallow water carbonate sediment dissolution in the global carbon cycle. Carbonate sediment dissolution is a globally significant process, but poorly understood in shallow marine waters. This project will determine whether the combined effect of organic matter, ocean acidification and pore water flow in shallow water carbonate sediments increases the release of calcium and alkalinity to the ocean. This project is significant because this release has not previously been accounted for and may lead ....Shallow water carbonate sediment dissolution in the global carbon cycle. Carbonate sediment dissolution is a globally significant process, but poorly understood in shallow marine waters. This project will determine whether the combined effect of organic matter, ocean acidification and pore water flow in shallow water carbonate sediments increases the release of calcium and alkalinity to the ocean. This project is significant because this release has not previously been accounted for and may lead to an additional uptake of atmospheric carbon dioxide into the global ocean, maybe some additional buffering against ocean acidification, but unfortunately, maybe also a loss of carbonate ecosystems. The outcomes of this project will make a significant contribution to our understanding of the global carbon cycle.
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Discovery Early Career Researcher Award - Grant ID: DE210100606
Funder
Australian Research Council
Funding Amount
$450,400.00
Summary
Effects of environmental change on seafood micronutrients: a SE Asian focus. This project aims to track variability in flows of essential micronutrients through marine food webs, to quantify how environmental changes will affect micronutrient supply to humans in seafood – findings that will be highly significant as governments grapple with increases in both malnutrition and ecological degradation. Expected outcomes: world-first models for accurately estimating nutrient production from SE Asian r ....Effects of environmental change on seafood micronutrients: a SE Asian focus. This project aims to track variability in flows of essential micronutrients through marine food webs, to quantify how environmental changes will affect micronutrient supply to humans in seafood – findings that will be highly significant as governments grapple with increases in both malnutrition and ecological degradation. Expected outcomes: world-first models for accurately estimating nutrient production from SE Asian reef fisheries up to 2050, under conditions of predicted climate change. Major expected benefits: new capacity to plan for food and nutrition security into an uncertain future, for Australia, our region, and beyond; with improvements to human nutrition and health, in accord with UN Sustainable Development Goal 2 (Zero Hunger).Read moreRead less
Dissolution of CaCO3 in sediments in an acidifying ocean. Dissolution of calcium carbonate (CaCO3) in sediments in the context of ocean acidification is poorly understood. This project will use in situ advective benthic chamber incubations and experimental manipulations under future ocean acidification scenarios to determine the controls on the dissolution of CaCO3 in sediments. This project is significant because changes in the dissolution of CaCO3 in sediments in an acidifying ocean are at lea ....Dissolution of CaCO3 in sediments in an acidifying ocean. Dissolution of calcium carbonate (CaCO3) in sediments in the context of ocean acidification is poorly understood. This project will use in situ advective benthic chamber incubations and experimental manipulations under future ocean acidification scenarios to determine the controls on the dissolution of CaCO3 in sediments. This project is significant because changes in the dissolution of CaCO3 in sediments in an acidifying ocean are at least as important, and potentially more important, than calcification to the future accretion and survival of carbonate ecosystems. It is expected that outcomes of this project will significantly advance our understanding of the drivers of the dissolution of CaCO3 in sediments and the functioning of globally important carbonate ecosystems.Read moreRead less
Multi-service assessment of intertidal treatment wetlands. This project aims to investigate the use of constructed intertidal wetlands to reduce nitrogen pollution while providing co-benefits including carbon sequestration and biodiversity. This research will generate a holistic assessment of the services, disservices, and cost-effectiveness of intertidal treatment wetlands compared to traditional wastewater treatment approaches. Expected outcomes include a full-scale multi-disciplinary environm ....Multi-service assessment of intertidal treatment wetlands. This project aims to investigate the use of constructed intertidal wetlands to reduce nitrogen pollution while providing co-benefits including carbon sequestration and biodiversity. This research will generate a holistic assessment of the services, disservices, and cost-effectiveness of intertidal treatment wetlands compared to traditional wastewater treatment approaches. Expected outcomes include a full-scale multi-disciplinary environmental and economic assessment of a constructed treatment wetland in a new urban development, providing industry and government partners the knowledge required to broaden uptake of intertidal wetlands as a cost-effective solution to growing levels of coastal anthropogenic pollution.Read moreRead less
Predicting biodiversity distribution on the Antarctic continental shelf. This project aims to develop an international database of underwater observations to predict the distribution of seafloor biodiversity over the entire Antarctic continental shelf for the present day and to 2100. Antarctic seafloor communities are unique and highly diverse, but their distribution is poorly known because biological data are sparse. These predictions depend on a unique and validated approach to estimate the pr ....Predicting biodiversity distribution on the Antarctic continental shelf. This project aims to develop an international database of underwater observations to predict the distribution of seafloor biodiversity over the entire Antarctic continental shelf for the present day and to 2100. Antarctic seafloor communities are unique and highly diverse, but their distribution is poorly known because biological data are sparse. These predictions depend on a unique and validated approach to estimate the present and future redistribution of surface primary production to the seafloor, and will enable calculating the amount of atmospheric carbon captured and stored at the seafloor. The maps will be at an unprecedented resolution of around 2 kilometres, and be invaluable tools underpinning policy, management and future science.Read moreRead less
Seagrass denitrification: importance for global nitrogen budgets. The objective of this project is to use cutting-edge techniques to measure denitrification rates in communities dominated by different tropical and temperate seagrass species. Denitrification is a globally significant critical ecosystem process, but it is poorly understood in seagrass communities. This project is significant because of the potential importance of seagrass communities for nitrogen loss via denitrification in coasta ....Seagrass denitrification: importance for global nitrogen budgets. The objective of this project is to use cutting-edge techniques to measure denitrification rates in communities dominated by different tropical and temperate seagrass species. Denitrification is a globally significant critical ecosystem process, but it is poorly understood in seagrass communities. This project is significant because of the potential importance of seagrass communities for nitrogen loss via denitrification in coastal systems and the importance of coastal systems in the global nitrogen budget. The expected outcomes of this study may significantly advance our understanding of the functioning of coastal systems and global nitrogen budgets.Read moreRead less
Unravelling the drivers of greenhouse gas emissions in estuaries. The aim of this project is to understand and quantify the factors controlling the emission of carbon dioxide, methane and nitrous oxide from estuaries. Coastal systems play a disproportionately large role in the global emissions of greenhouse gases, but this is poorly quantified. The project plans to use a combination of continuous concentration and stable isotope measurements, process measurements and advanced numerical modelling ....Unravelling the drivers of greenhouse gas emissions in estuaries. The aim of this project is to understand and quantify the factors controlling the emission of carbon dioxide, methane and nitrous oxide from estuaries. Coastal systems play a disproportionately large role in the global emissions of greenhouse gases, but this is poorly quantified. The project plans to use a combination of continuous concentration and stable isotope measurements, process measurements and advanced numerical modelling across a range of undisturbed to disturbed systems. It is intended that this project will provide information for conceptualising, calibrating and verifying models, including green-house gas production. Good models, and the data that support them, such as that provided by this study, are critical for the efficient allocation of management resources in Australian coastal systems, including by our partners. The findings from this project will have direct implications to the management, rehabilitation and protection of waterways (including biodiversity) in Australia.Read moreRead less
Stabilisation of algal biomass harvested from coal seam gas associated water to generate a renewable, high nutrient resource. This project will develop composting technology to stabilise the biomass harvested from coal seam gas ponds. A feature of the project is consideration of toxic algal metabolites, and the potential for the release and degradation of these compounds during stabilisation.
Will trees get enough nitrogen to sustain productivity in elevated CO2? The project proposes to explore how tissue nitrogen declines in future elevated carbon dioxide (eCO2) by studying the availability of soil nitrogen to plants and use of nitrogen by Eucalyptus woodland trees. Plant canopy nitrogen concentrations decline in nearly every large-scale eCO2 study done on native soils. The project plans to explore how changes in ecosystem nitrogen balance occur, by investigating if leaf nitrogen de ....Will trees get enough nitrogen to sustain productivity in elevated CO2? The project proposes to explore how tissue nitrogen declines in future elevated carbon dioxide (eCO2) by studying the availability of soil nitrogen to plants and use of nitrogen by Eucalyptus woodland trees. Plant canopy nitrogen concentrations decline in nearly every large-scale eCO2 study done on native soils. The project plans to explore how changes in ecosystem nitrogen balance occur, by investigating if leaf nitrogen declines under eCO2 due to the balance of plant activity versus changes in soil nitrogen availability. The outcomes are central to knowing the extent to which extra nitrogen ‘feeds’ the eCO2 fertilisation response and sustains long-term increases in productivity. Expected outcomes may support the development of management options to sustain future forest productivity.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE180100746
Funder
Australian Research Council
Funding Amount
$365,058.00
Summary
Trait plasticity and the maintenance of functional diversity. This project aims to determine if trait plasticity mediates functional degradation of coral reefs. It will use natural environmental gradients to identify mechanisms that enable corals to persist in marginal habitats. The project will use three-dimensional imaging to measure how variability in traits influences functional redundancy. This will facilitate better predictions of the effects of environmental change on reef systems. Expect ....Trait plasticity and the maintenance of functional diversity. This project aims to determine if trait plasticity mediates functional degradation of coral reefs. It will use natural environmental gradients to identify mechanisms that enable corals to persist in marginal habitats. The project will use three-dimensional imaging to measure how variability in traits influences functional redundancy. This will facilitate better predictions of the effects of environmental change on reef systems. Expected outcomes include improved understanding of the response of coral reef ecosystems to environmental change and a framework for predicting reefs at risk of degradation. Benefits will be to both global biodiversity conservation and the provision of ecosystem services in reef dependent communities.Read moreRead less