Bioeconomic Modelling of Marine Reserves. Australian waters contain a huge range of biodiversity, but are under threat from human activities. To face this challenge and resolve the problems of depleted fisheries and habitat destruction, innovative approaches are required to integrate marine biology with fisheries economics. The research meets this immediate need by developing bioeconomic models of marine reserves to determine reserve location and size, and analyse interactions between reserves a ....Bioeconomic Modelling of Marine Reserves. Australian waters contain a huge range of biodiversity, but are under threat from human activities. To face this challenge and resolve the problems of depleted fisheries and habitat destruction, innovative approaches are required to integrate marine biology with fisheries economics. The research meets this immediate need by developing bioeconomic models of marine reserves to determine reserve location and size, and analyse interactions between reserves and harvested areas under environmental uncertainty. The models will be developed using the latest developments in economics, biology and numerical methods and will be used to conserve Australia's marine biodiversity and improve fisheries management.Read moreRead less
Effects of European colonisation on indigenous ecosystems: multiple-scale spatial structure of pre- and post-settlement Callitris forests. Since European colonisation, altered disturbance regimes, especially fire and grazing, have greatly affected intact ecosystems across the globe. However, the extent and causes of changes are often hotly contested. This study will examine how European colonisation has affected natural ecosystems, by documenting historical fire regimes and comparing pre- and po ....Effects of European colonisation on indigenous ecosystems: multiple-scale spatial structure of pre- and post-settlement Callitris forests. Since European colonisation, altered disturbance regimes, especially fire and grazing, have greatly affected intact ecosystems across the globe. However, the extent and causes of changes are often hotly contested. This study will examine how European colonisation has affected natural ecosystems, by documenting historical fire regimes and comparing pre- and post-settlement forest patterns across multiple spatial scales. The study will be conducted in temperate Callitris forests, and will provide the first, multiple-scale, spatial analysis of post-settlement vegetation changes in Australia. Results will enhance our global understanding of European environmental impacts and provide quantitative benchmarks to inform vegetation management.Read moreRead less
IMPACTS OF RIVER NUTRIENTS ON THE GREAT BARRIER REEF LAGOON. While salinity was one of the first properties of the ocean to be studied, it is one of the last to be measured by remote sensing. A prototype air borne salinity mapper will be used in this project along with an airborne multi-spectral sampler to develop a new approach to the study of river plumes. The salinity and nutrient densities will be traced to determine the destination of river runoff. Outcomes will assist the management of ....IMPACTS OF RIVER NUTRIENTS ON THE GREAT BARRIER REEF LAGOON. While salinity was one of the first properties of the ocean to be studied, it is one of the last to be measured by remote sensing. A prototype air borne salinity mapper will be used in this project along with an airborne multi-spectral sampler to develop a new approach to the study of river plumes. The salinity and nutrient densities will be traced to determine the destination of river runoff. Outcomes will assist the management of the Great Barrier Reef Marine Park and land management near the coast, and will improve our understanding of the carbon sink in coastal waters.Read moreRead less
Experimental and theoretical analysis of gas leakage rate through composite landfill covers due to geomembrane defects. The Australian Greenhouse Office indicated that waste emissions contributed 3.1% of net national emissions in 2001 with methane emissions from landfills accounting for 92% of total methane emissions from the waste sector, despite an increase in methane recovered from solid waste. It pointed out that the recent changes in waste management practices did not have an impact on repo ....Experimental and theoretical analysis of gas leakage rate through composite landfill covers due to geomembrane defects. The Australian Greenhouse Office indicated that waste emissions contributed 3.1% of net national emissions in 2001 with methane emissions from landfills accounting for 92% of total methane emissions from the waste sector, despite an increase in methane recovered from solid waste. It pointed out that the recent changes in waste management practices did not have an impact on reported methane emission levels and there is need to undertake a range of activities to reduce emissions from waste management activities. This project will address specifically the above issue by providing a new method of analysis to predict gas leakage rate and allow engineers to propose solutions to mitigate gas escapes. Read moreRead less
Bioinvasions: the interactive effects of propagule pressure and pollution. The successful establishment of species outside their native range is an increasingly frequent occurrence and can cause reductions in biodiversity and ecosystem disruption. Bioinvasions may also cause public health risks and damage to agriculture and fisheries. Nowhere is the accelerating pace of bioinvasions more dramatic than in ports and harbours. This project will determine the effects of pollution on invasion in a ma ....Bioinvasions: the interactive effects of propagule pressure and pollution. The successful establishment of species outside their native range is an increasingly frequent occurrence and can cause reductions in biodiversity and ecosystem disruption. Bioinvasions may also cause public health risks and damage to agriculture and fisheries. Nowhere is the accelerating pace of bioinvasions more dramatic than in ports and harbours. This project will determine the effects of pollution on invasion in a marine system. This project is in the national interest because it will identify mechanisms through which the invasion of exotic species are encouraged and assist in the identification and prioritisation of effective management strategies to prevent invasion.Read moreRead less
Do pollution events facilitate biotic invasion in marine systems? This project aims to determine whether pollution affects the biological resistance of assemblages to invasion. The discharge of toxicants into coastal waters is an increasingly important source of disturbance that has the potential to make marine assemblages more susceptible to biotic invasion. The project will determine if pollution events facilitate the colonisation, persistence and spread of non-native species and how initial a ....Do pollution events facilitate biotic invasion in marine systems? This project aims to determine whether pollution affects the biological resistance of assemblages to invasion. The discharge of toxicants into coastal waters is an increasingly important source of disturbance that has the potential to make marine assemblages more susceptible to biotic invasion. The project will determine if pollution events facilitate the colonisation, persistence and spread of non-native species and how initial assemblage diversity modifies this response. The generality of several important ecological hypotheses developed in plant communities are tested in marine systems for the first time and extended to include the role of toxic disturbances.Read moreRead less
Interactions between denitrification and carbon mineralisation in permeable sediments: A new approach using state of the art instruments and modelling. Excessive nutrient release from manmade sources may lead to algal blooms in aquatic environments. Nitrogen is a nutrient of particular concern in coastal waters because it controls algal growth. Aquatic environments are able to cleanse themselves of excess nitrogen by a process known as denitrification which happens in the sediments. Amazingly ....Interactions between denitrification and carbon mineralisation in permeable sediments: A new approach using state of the art instruments and modelling. Excessive nutrient release from manmade sources may lead to algal blooms in aquatic environments. Nitrogen is a nutrient of particular concern in coastal waters because it controls algal growth. Aquatic environments are able to cleanse themselves of excess nitrogen by a process known as denitrification which happens in the sediments. Amazingly, we have no understanding of how denitrification works in sands despite the fact that most of the coastline is covered in sand. The results from this project will provide critical information needed to predict and reduce algal blooms in coastal waters.Read moreRead less
Identifying and creating essential habitat for rare Australian intertidal molluscs. Coastal development in Australia causes major changes to natural habitats. Obligations to conserve biodiversity are impossible without reliable information about how animals respond to habitat and how best to restore damaged habitat. Current management treats habitats as large-scale units and ignores fine-scale use of habitat by animals. This project will provide essential understanding to guide policy about coas ....Identifying and creating essential habitat for rare Australian intertidal molluscs. Coastal development in Australia causes major changes to natural habitats. Obligations to conserve biodiversity are impossible without reliable information about how animals respond to habitat and how best to restore damaged habitat. Current management treats habitats as large-scale units and ignores fine-scale use of habitat by animals. This project will provide essential understanding to guide policy about coastal conservation, by providing ecologically realistic understanding of associations between rare invertebrates and habitat. New protocols to measure these associations and success of restoration, will be applicable to any rare species in any complex habitat, increasing present capabilities for conservation.Read moreRead less
Measuring the flushing time of waters in the Great Barrier Reef. There are concerns both in the scientific community and in the general public about the possible implications of agricultural runoff to the Great Barrier Reef (GBR). Due to this, the Great Barrier Reef Marine Park Authority has developed a "Reef Water Quality Protection Plan" (RWQPP) which may have significant economic implications to the grazing, sugar, and other primary industries. In order to protect the GBR, whilst also minimiz ....Measuring the flushing time of waters in the Great Barrier Reef. There are concerns both in the scientific community and in the general public about the possible implications of agricultural runoff to the Great Barrier Reef (GBR). Due to this, the Great Barrier Reef Marine Park Authority has developed a "Reef Water Quality Protection Plan" (RWQPP) which may have significant economic implications to the grazing, sugar, and other primary industries. In order to protect the GBR, whilst also minimizing the impacts on agricultural industries, it is important to understand the processes that affect the buildup and broad-scale dispersion of contaminants in the GBR. This project will facilitate that understanding.Read moreRead less
Coral reef connectivity: an empirical and theoretical synthesis. Australia possesses the greatest marine biodiversity of any first world country and this biodiversity is a major contributor to our economic wealth. Nonetheless, Australia's coral reef communities are threatened by various human activities and climate change. Wisely designed systems of marine reserves are critical to mitigating threats to coral reefs, but existing approaches do not incorporate crucial information about ecological c ....Coral reef connectivity: an empirical and theoretical synthesis. Australia possesses the greatest marine biodiversity of any first world country and this biodiversity is a major contributor to our economic wealth. Nonetheless, Australia's coral reef communities are threatened by various human activities and climate change. Wisely designed systems of marine reserves are critical to mitigating threats to coral reefs, but existing approaches do not incorporate crucial information about ecological connections between reefs. We will use graph theory metrics to identify priority reefs for protection based on empirical genetic and hydrological connectivity information. In addition, we will determine the sensitivity of these priorities to climate change scenarios.Read moreRead less