The ecological impact of large carnivore restoration. This project aims to assess the ecological changes that have arisen due to the repatriation of estuarine crocodiles to Australian ecosystems. It is significant because the restoration provides a rare opportunity to empirically test changes in ecosystem processes under varying degrees of large carnivore predation pressure. Expected outcomes include improved understanding of the processes that govern the strength of predator-ecosystem interacti ....The ecological impact of large carnivore restoration. This project aims to assess the ecological changes that have arisen due to the repatriation of estuarine crocodiles to Australian ecosystems. It is significant because the restoration provides a rare opportunity to empirically test changes in ecosystem processes under varying degrees of large carnivore predation pressure. Expected outcomes include improved understanding of the processes that govern the strength of predator-ecosystem interactions and an ability to quantify the biomass, social structure, and behaviours of predators required to influence these processes. Benefits should include improvements in how the ecological role of large carnivores is measured, and when and where carnivore populations should be culled or conserved.Read moreRead less
Where's the beef? A systems model for taming a wicked environmental problem. Demand for beef is increasing dramatically, particularly in Asia. This project aims to build systems models of local environmental impacts of beef production coupled with models of global beef trade to analyse production and policy scenarios. Beef is the food commodity with the largest ecological footprint, and increased production will have globally significant impacts on land and water resources, biodiversity, and cli ....Where's the beef? A systems model for taming a wicked environmental problem. Demand for beef is increasing dramatically, particularly in Asia. This project aims to build systems models of local environmental impacts of beef production coupled with models of global beef trade to analyse production and policy scenarios. Beef is the food commodity with the largest ecological footprint, and increased production will have globally significant impacts on land and water resources, biodiversity, and climate. The scale of these impacts depends on where and how cattle production occurs. Outcomes of this research include a framework for projecting regional and global ecological impacts of domestic cattle production policies, allowing informed decisions that consider and benefit environmental and socio-economic values.Read moreRead less
Nitrogen characteristics of plant communities along the North Australian Tropical Transect (NATT). It has become evident that biosphere processes need to be addressed at a global scale to understand global changes. Continental transects analyse ecosystem processes in a global context. The North Australian Tropical Transect (Darwin to Tennant Creek) represents 25% of Australia's vegetation. Biogeological research is underway on NATT ecosystems. Nitrogen availability strongly affects ecosystem pro ....Nitrogen characteristics of plant communities along the North Australian Tropical Transect (NATT). It has become evident that biosphere processes need to be addressed at a global scale to understand global changes. Continental transects analyse ecosystem processes in a global context. The North Australian Tropical Transect (Darwin to Tennant Creek) represents 25% of Australia's vegetation. Biogeological research is underway on NATT ecosystems. Nitrogen availability strongly affects ecosystem productivity, and is of major interest as nitrogen pollution threatens the biosphere. In Australia, nitrogen levels are generally low, but overall knowledge is limited. An integrated ecophysiological approach will relate soil and plant nitrogen characteristics, and provide an analysis of nitrogen relations along NATT. Results will be linked to existing NATT and international transect research.Read moreRead less
A novel approach to tracking estuarine food chains: combined use of fatty acid and stable isotope biomarkers. Fatty acid biomarkers provide promising novel tracers for studying estuarine food chains. Stable isotopes, commonly employed in food chain studies, lack specificity to allow easy determination of feeding relationships. Different primary producers are characterised by unique fatty acid sequences. This study will thoroughly evaluate the applicability of fatty acid biomarkers in tracking ....A novel approach to tracking estuarine food chains: combined use of fatty acid and stable isotope biomarkers. Fatty acid biomarkers provide promising novel tracers for studying estuarine food chains. Stable isotopes, commonly employed in food chain studies, lack specificity to allow easy determination of feeding relationships. Different primary producers are characterised by unique fatty acid sequences. This study will thoroughly evaluate the applicability of fatty acid biomarkers in tracking both natural and human-impacted estuarine food chains. By developing a new approach of combining the advantages of fatty acid bioamrkers and stable isotopes in studying estuarine trophodynamics, this study will provide essential information for the management of estuarine biotic resources.Read moreRead less
Biodiversity in high rainfall mediterranean-climate ecosystems: Integrating fields of ecological enquiry to achieve improved conservation outcomes. This project targets research priority 'An Environmentally Sustainable Australia' through the management and protection of Australia's terrestrial biodiversity, and by increasing understanding of the impact of climate change and variability at the local to regional level. By linking disparate data sets across similar climatic regions, and through dir ....Biodiversity in high rainfall mediterranean-climate ecosystems: Integrating fields of ecological enquiry to achieve improved conservation outcomes. This project targets research priority 'An Environmentally Sustainable Australia' through the management and protection of Australia's terrestrial biodiversity, and by increasing understanding of the impact of climate change and variability at the local to regional level. By linking disparate data sets across similar climatic regions, and through direct links to management agencies, this project will enable development of a landscape conservation culture for improved conservation outcomes, and more direct information use through science-based adaptive management. Efficient use of existing data and the 'promotion of an innovation culture and economy' by linking global perspectives to local conservation needs, are hallmarks of this project.Read moreRead less
Assessment of the Risks Posed to an Antarctic Keystone Species, Antarctic krill (Euphausia superba), Through Exposure to Persistent Organic Pollutants. POPs are subject to a global treaty seeking to reduce and eventually eliminate these chemicals from the environment. Inhibiting the development of effective intervention strategies is a lack of knowledge regarding biological dose-response and cause-effect relationships. The proposed study will develop multiple endpoint assays to investigate these ....Assessment of the Risks Posed to an Antarctic Keystone Species, Antarctic krill (Euphausia superba), Through Exposure to Persistent Organic Pollutants. POPs are subject to a global treaty seeking to reduce and eventually eliminate these chemicals from the environment. Inhibiting the development of effective intervention strategies is a lack of knowledge regarding biological dose-response and cause-effect relationships. The proposed study will develop multiple endpoint assays to investigate these species-specific relationships and undertake a multidisciplinary risk assessment of increasing POP levels to E. superba. The research will fulfil national treaty requirements and represents an excellent opportunity to advance the field of polar and marine POP ecotoxicology. Outcomes will be critical for the sustainable management of a commercial resource and a pressured keystone species. Read moreRead less
Integrating the conservation and ecosystem-service value of Australia's catchments. This project addresses the Priority Goal of Sustainable Use of Biodiversity by explicitly linking the intrinsic value of biodiversity and supporting ecosystems with the services they provide to humanity (e.g. carbon storage and nutrient cycling). It will employ a comprehensive, innovative approach to integrating conservation, market and non-market values of land holdings in Australia's catchments using the concep ....Integrating the conservation and ecosystem-service value of Australia's catchments. This project addresses the Priority Goal of Sustainable Use of Biodiversity by explicitly linking the intrinsic value of biodiversity and supporting ecosystems with the services they provide to humanity (e.g. carbon storage and nutrient cycling). It will employ a comprehensive, innovative approach to integrating conservation, market and non-market values of land holdings in Australia's catchments using the concept of nature's services. Through extensive collaboration among leading scientists and land managers, the project will identify sites of high value requiring special attention, yield important theoretical advancements to how we value ecosystems, and provide practical and easily applied guidelines for land managers. Read moreRead less
Conservation of tropical forests for their carbon and biodiversity values. International efforts to save tropical forests for the carbon they store could help mitigate climate change and biodiversity loss. This project will aid these efforts by developing methods to model future deforestation and extending decision theory for the new challenges presented by international carbon-payment schemes.
Operationalizing marine reserve design for rebuilding tropical fisheries. Operationalizing marine reserve design for rebuilding tropical fisheries. This project intends to maximise the scope for rebuilding reef fisheries while ensuring short-term levels do not become too low. Like many developing countries, Indonesia wishes to rebuild its heavily over-exploited coral reef fisheries. Marine reserves allow fish populations to recover and replenish fished areas. However, because reserves remove fis ....Operationalizing marine reserve design for rebuilding tropical fisheries. Operationalizing marine reserve design for rebuilding tropical fisheries. This project intends to maximise the scope for rebuilding reef fisheries while ensuring short-term levels do not become too low. Like many developing countries, Indonesia wishes to rebuild its heavily over-exploited coral reef fisheries. Marine reserves allow fish populations to recover and replenish fished areas. However, because reserves remove fishing grounds, fish catches tend to decrease in the short-term while fish recover in reserves; a process that can take a decade. Loss of yield can be so burdensome that managers abandon fisheries. This research is intended to improve the economic security of fishers and food security, and inform World Bank and Australian aid programs.Read moreRead less
Tipping points and early warning signals in complex ecosystems. This project aims to create a theory of early warning that uses spatial data available on system state, connectivity and environmental stress, and to create tools to infer the risk of ecosystem collapse. Many ecosystems have irreversible tipping points. Since their locations are often unknown, metrics may provide an early warning of collapse but are difficult to apply because they need long time series which are usually lacking. Thi ....Tipping points and early warning signals in complex ecosystems. This project aims to create a theory of early warning that uses spatial data available on system state, connectivity and environmental stress, and to create tools to infer the risk of ecosystem collapse. Many ecosystems have irreversible tipping points. Since their locations are often unknown, metrics may provide an early warning of collapse but are difficult to apply because they need long time series which are usually lacking. This project will use the Great Barrier Reef as a testbed because it has both long time series (standard approach) and rich spatial data (new approach), and exhibits early warning signs. We will use these tools to gauge whether symptoms on the Great Barrier Reef predict local collapse and to develop intervention plans.Read moreRead less