Tree-mediated methane fluxes: A new frontier in the global carbon cycle. Methane is an extremely potent greenhouse gas. Recent evidence suggests that tree-mediated fluxes may be a significant, but overlooked source of methane to the atmosphere. This project aims to quantify the magnitude and drivers of tree-mediated methane fluxes from Australia’s dominant forest types. Innovatively, we will be using a novel combination of empirical field based measurements, gas tracer experiments, microbial ana ....Tree-mediated methane fluxes: A new frontier in the global carbon cycle. Methane is an extremely potent greenhouse gas. Recent evidence suggests that tree-mediated fluxes may be a significant, but overlooked source of methane to the atmosphere. This project aims to quantify the magnitude and drivers of tree-mediated methane fluxes from Australia’s dominant forest types. Innovatively, we will be using a novel combination of empirical field based measurements, gas tracer experiments, microbial analysis and modelling methods. Expected outcomes are a mechanistic understanding of tree-mediated methane fluxes, helping to constrain regional, national and global methane budgets. The results of this study will help inform publicly funded greenhouse gas abatement strategies, ensuring a maximal return on investment.Read moreRead less
Avoiding coral bleaching: investigation into the repair of damaged photosynthetic machinery in symbiotic algae (symbiodinium) within corals. Photosynthesis in symbiotic algae within corals is essential for a healthy alga-coral symbiotic relationship. This project will provide new insights into how symbiotic algae maintain higher photosynthetic performance in corals through elucidating the mechanism associated with the repair of photodamaged photosynthetic machinery.
The role of drought-stress and insect attack on rainforest plant health. This project aims to examine the vulnerability of tropical plants to drought and insect attack in a large-scale field experiment. We will pioneer a new research approach that focuses on the causes and stages of decline in plant health prior to death, in order to identify the characteristics of plant species that make them more susceptible to drought and insect attack. Expected outcomes of this project include an improved ca ....The role of drought-stress and insect attack on rainforest plant health. This project aims to examine the vulnerability of tropical plants to drought and insect attack in a large-scale field experiment. We will pioneer a new research approach that focuses on the causes and stages of decline in plant health prior to death, in order to identify the characteristics of plant species that make them more susceptible to drought and insect attack. Expected outcomes of this project include an improved capacity to predict the function and composition of future forests. This project will provide significant benefits to communities concerned with the direct and indirect effects of droughts in protected areas, forestry reserves and agriculture. Read moreRead less
Australian coastal health watch: Improved marine primary productivity estimates using advanced Fast Repetition Rate fluorometry. Primary productivity by marine phytoplankton directly controls global climate, supports fisheries and is an indicator of marine ecosystem health. Successful management of the world’s marine ecosystems rests on improving the accuracy with which primary productivity is measured and monitored. This internationally collaborative research program will develop a new sensor-b ....Australian coastal health watch: Improved marine primary productivity estimates using advanced Fast Repetition Rate fluorometry. Primary productivity by marine phytoplankton directly controls global climate, supports fisheries and is an indicator of marine ecosystem health. Successful management of the world’s marine ecosystems rests on improving the accuracy with which primary productivity is measured and monitored. This internationally collaborative research program will develop a new sensor-based approach – fast repetition rate fluorometry – to measure different phytoplankton groups that regulate primary productivity in Australia’s complex marine environments. Application of these measurements will enable more accurate monitoring of the status of Australia’s marine systems to inform ocean resource management decisions in order to safeguard marine ecosystem heath.Read moreRead less
AirLIFT – an airborne active chlorophyll fluorescence sensing system for assessment of photosynthetic activity in plant canopies. Assessment of plant health and productivity is vital to ensure future food security of the global population under a changing climate. Chlorophyll fluorescence (CF), a signal emitted by green plants, can reveal this information. Although CF has revolutionised photosynthetic research, current measurements are limited to individual plants. Remote sensing of canopy CF is ....AirLIFT – an airborne active chlorophyll fluorescence sensing system for assessment of photosynthetic activity in plant canopies. Assessment of plant health and productivity is vital to ensure future food security of the global population under a changing climate. Chlorophyll fluorescence (CF), a signal emitted by green plants, can reveal this information. Although CF has revolutionised photosynthetic research, current measurements are limited to individual plants. Remote sensing of canopy CF is required for efficient management of agricultural crops, forests, and natural ecosystems and is crucial for accurate estimation of plant carbon assimilation and production. This project will deliver remote sensing technology to bridge the gap between leaf and canopy productivity and pave the way for understanding both artificial and solar induced canopy CF measured from space.Read moreRead less
Novel oxygen sensing tools for monitoring the effects of dredging on Australian seagrass communities. Seagrass meadows sustain marine biodiversity and the fishing industries on Australian coasts. Dredging of ports and shipping channels is contributing to their rapid global decline. The project will use state-of-the-art technologies in bio-optics and genomics to create a toolkit for seagrass managers to make informed decisions to safeguard seagrass meadows.
Ecophysiology of stem succulent halophytes subject to changes in salinity and water availability: distinguishing natural dynamics from potential mine-related impacts. This project contributes to the National Research Priority of an environmentally sustainable Australia. The project will underpin management strategies of vegetation in saline lakes/marshes; wetlands of national importance to biodiversity. Understanding the vegetation at the Fortescue Marshes will provide vital base-information for ....Ecophysiology of stem succulent halophytes subject to changes in salinity and water availability: distinguishing natural dynamics from potential mine-related impacts. This project contributes to the National Research Priority of an environmentally sustainable Australia. The project will underpin management strategies of vegetation in saline lakes/marshes; wetlands of national importance to biodiversity. Understanding the vegetation at the Fortescue Marshes will provide vital base-information for the future, and have flow-on benefits for improved strategies for revegetation of saline lands. Improvement of the publicly available Herbarium database on samphire species will also enable improved species identifications for conservation and/or rehabilitation efforts. The project will train a PhD student in an industry-relevant research area that is currently in high demand.Read moreRead less
Global change in the sub-antarctic - Temperature response of vascular plant species from Macquarie and Heard Islands. The aim is to understand how subantarctic and alpine plant species that have evolved, respectively, in equable and highly variable temperature regimes will respond to increase in temperature resulting from global warming and climate change. The proposed project will identify species that are likely to benefit from, or are vulnerable to, rising temperatures. Processes underlying a ....Global change in the sub-antarctic - Temperature response of vascular plant species from Macquarie and Heard Islands. The aim is to understand how subantarctic and alpine plant species that have evolved, respectively, in equable and highly variable temperature regimes will respond to increase in temperature resulting from global warming and climate change. The proposed project will identify species that are likely to benefit from, or are vulnerable to, rising temperatures. Processes underlying adaptation and acclimation of plant growth to increasing temperature will also be identified. These results will be significant for conservation of biodiversity and management of Australia's unique subantarctic and alpine flora.Read moreRead less
Mitigation of Impacts on Groundwater Dependent Vegetation Through Adaptive Abstraction Regimes. Apart from loss of habitat, biodiversity, ecological function and aesthetics, tree decline and death is a financial burden to land managers. Lost groundwater production from existing borefield infrastructure due to environmental risk also represents a significant economic loss to industry. By adapting borefield operation strategies to be more sympathetic to environmental demands for groundwater, susta ....Mitigation of Impacts on Groundwater Dependent Vegetation Through Adaptive Abstraction Regimes. Apart from loss of habitat, biodiversity, ecological function and aesthetics, tree decline and death is a financial burden to land managers. Lost groundwater production from existing borefield infrastructure due to environmental risk also represents a significant economic loss to industry. By adapting borefield operation strategies to be more sympathetic to environmental demands for groundwater, sustainable use of the resource can be maximized under otherwise 'high-risk' scenarios. This project will result in environmental benefits such as reduced impacts of borefields and economic benefits such as recovery of lost production from 'high-risk' borefields, increased viability of planned schemes and reduced customer cost of water services.Read moreRead less
Answering longstanding plant ecology questions with new technology: the effects of changes in leaf proteins with age. Total leaf nitrogen is important for major processes in ecosystems. It is used as a predictor for carbon fixation because photosynthesis proteins are a large fraction of leaf nitrogen. Yet leaf nitrogen may also be allocated to stress-response and defense-related proteins at the expense of photosynthesis proteins. Our working hypothesis might explain two important ecological patt ....Answering longstanding plant ecology questions with new technology: the effects of changes in leaf proteins with age. Total leaf nitrogen is important for major processes in ecosystems. It is used as a predictor for carbon fixation because photosynthesis proteins are a large fraction of leaf nitrogen. Yet leaf nitrogen may also be allocated to stress-response and defense-related proteins at the expense of photosynthesis proteins. Our working hypothesis might explain two important ecological patterns: the decline of photosynthetic nitrogen use efficiency with leaf age; and, low and variable nitrogen recovery levels from senescent leaves across species and habitats. New quantitative proteomics methods together with protein functional categorisation can answer these questions across dozens of Australian native plant species.Read moreRead less