The pharmacokinetics of plant secondary metabolites and their effects on feeding in the brushtail possum. Plant secondary metabolites (PSMs) are considered to protect against herbivory, although the mechanisms are not well understood. This project will determine how marsupial folivores avoid toxicity when browsing on Eucalyptus leaf. Blood levels of terpenes, phenols and their metabolites will be measured in the brushtail possum while it feeds on a diet of varying PSM content. We expect to be ab ....The pharmacokinetics of plant secondary metabolites and their effects on feeding in the brushtail possum. Plant secondary metabolites (PSMs) are considered to protect against herbivory, although the mechanisms are not well understood. This project will determine how marsupial folivores avoid toxicity when browsing on Eucalyptus leaf. Blood levels of terpenes, phenols and their metabolites will be measured in the brushtail possum while it feeds on a diet of varying PSM content. We expect to be able to show relationships between the ingestion and blood levels of PSMs and feeding behaviour. This will give a greater understanding of the effect of plant toxins on browsing behaviour, enabling improved foraging models and more effective habitat management.Read moreRead less
Managing Tasmanian devil populations affected by the Devil Facial Tumour Disease. This project aims to put the science behind management options for wild Tasmanian devil populations affected by the Devil Facial Tumour Disease (DFTD), a new emerging wildlife disease that is decimating devil populations across large parts of Tasmania. DFTD behaves atypically compared with well-studied wildlife disease models; this project may result in important breakthroughs in our understanding of wildlife disea ....Managing Tasmanian devil populations affected by the Devil Facial Tumour Disease. This project aims to put the science behind management options for wild Tasmanian devil populations affected by the Devil Facial Tumour Disease (DFTD), a new emerging wildlife disease that is decimating devil populations across large parts of Tasmania. DFTD behaves atypically compared with well-studied wildlife disease models; this project may result in important breakthroughs in our understanding of wildlife diseases. Conservation outcomes of the project may slow the spread of the disease and in aiding population recovery. Devils are an iconic species with economic benefits for ecotourism and livestock farms, industries which are based in economically depressed rural regions.Read moreRead less
Applying macroecology to assist in the management of Kakadu National Park. The ecological integrity of Kakadu National Park is threatened by fires, weeds, and feral animals. To help tackle these problems, we will develop a cost-effective, culturally appropriate, park-wide monitoring system based on changes in the boundaries of closed forests, woodland and grassland. We will gauge the effect of broad-scale land management interventions, and predict the consequences of future change. The findings ....Applying macroecology to assist in the management of Kakadu National Park. The ecological integrity of Kakadu National Park is threatened by fires, weeds, and feral animals. To help tackle these problems, we will develop a cost-effective, culturally appropriate, park-wide monitoring system based on changes in the boundaries of closed forests, woodland and grassland. We will gauge the effect of broad-scale land management interventions, and predict the consequences of future change. The findings of this study will be transferable to other landscape settings in Australia and overseas. It will contribute to debates about the ecological consequences of current land management practices and how these compare with past Aboriginal land management.Read moreRead less
Incorporation of vulnerability and irreplaceability into marine protected area planning. The primary national benefit will be to better safeguard biological diversity by reducing extinction risk for marine species. This will be achieved through analysis of factors affecting extinction risk, and through the development of protocols to improve the siting of marine protected areas for conservation outcomes. A more effective National Representative System of Marine Protected Areas will be achieved t ....Incorporation of vulnerability and irreplaceability into marine protected area planning. The primary national benefit will be to better safeguard biological diversity by reducing extinction risk for marine species. This will be achieved through analysis of factors affecting extinction risk, and through the development of protocols to improve the siting of marine protected areas for conservation outcomes. A more effective National Representative System of Marine Protected Areas will be achieved through decreased extinction risk and lower opportunity costs. In addition, a quantitative baseline dataset will be obtained for evaluating long-term changes in threatened marine species populations, and the effectiveness of future management actions aimed to safeguard threatened species.Read moreRead less
Partitioning of primary production by crustacean grazers in the Antarctic sea ice zone. Crustaceans are an important component of the Antarctic marine ecosystem. Large numbers live in or close to the sea-ice cover, using it as a refuge from predation and a source of food. However, the impact of these animals on algae that grows in the sea-ice is unknown. This study will examine the diets and grazing rates of crustaceans in the Antarctic sea-ice ecosystem. These results will aid our understanding ....Partitioning of primary production by crustacean grazers in the Antarctic sea ice zone. Crustaceans are an important component of the Antarctic marine ecosystem. Large numbers live in or close to the sea-ice cover, using it as a refuge from predation and a source of food. However, the impact of these animals on algae that grows in the sea-ice is unknown. This study will examine the diets and grazing rates of crustaceans in the Antarctic sea-ice ecosystem. These results will aid our understanding of the fate of algal production in sea-ice and will enable the construction of realistic carbon budgets for this ecosystem.Read moreRead less
Effectiveness of temperate Australian marine protected areas as tools for biodiversity conservation and informing fisheries management. The effectiveness of marine protected areas (MPAs) for biodiversity protection and informing fisheries management will be investigated at a continental scale for the first time. Communities of fishes, invertebrates and plants at >100 sites within MPAs in WA, NSW and Tasmania will be studied from prior to fisheries protection, with changes over time compared with ....Effectiveness of temperate Australian marine protected areas as tools for biodiversity conservation and informing fisheries management. The effectiveness of marine protected areas (MPAs) for biodiversity protection and informing fisheries management will be investigated at a continental scale for the first time. Communities of fishes, invertebrates and plants at >100 sites within MPAs in WA, NSW and Tasmania will be studied from prior to fisheries protection, with changes over time compared with changes at fished reference sites. This study represents a human predator exclusion experiment with a scale sufficiently large to distinguish general patterns from among site specific and species specific variability. It will provide management authorities with information crucial to determining MPA number, size and configuration.Read moreRead less
Evolution, disease and extinction - using ancient and modern Deoxyribonucleic acid (DNA) to investigate molecular evolution in the Tasmanian devil. The Tasmanian devil is Australia's largest living marsupial carnivore and one of Tasmania's key tourism icons. Extinction in the wild will have long-term impacts on Tasmanian native ecosystems and economy. This study will provide critical genetic data and tools to monitor and prioritise conservation strategies, including insurance populations and dis ....Evolution, disease and extinction - using ancient and modern Deoxyribonucleic acid (DNA) to investigate molecular evolution in the Tasmanian devil. The Tasmanian devil is Australia's largest living marsupial carnivore and one of Tasmania's key tourism icons. Extinction in the wild will have long-term impacts on Tasmanian native ecosystems and economy. This study will provide critical genetic data and tools to monitor and prioritise conservation strategies, including insurance populations and disease suppression, aimed at preventing extinction. It will strengthen ongoing conservation programs carried out by the Save the Tasmanian Devil Program and will help publicise the plight of the devil both nationally and internationally.Read moreRead less
Assessing the risk of genetic pollution from Eucalyptus globulus and Corymbia plantations. We will provide the biological information necessary to assess the risk of genetic pollution of native eucalypt forest from plantations of Eucalyptus globulus and Corymbia torelliana. Key biological factors that can act as barriers to hybridisation including flowering time, pollen and seed dispersal distances, crossability, hybrid fitness and the potential for backcrossing will be identified and used to de ....Assessing the risk of genetic pollution from Eucalyptus globulus and Corymbia plantations. We will provide the biological information necessary to assess the risk of genetic pollution of native eucalypt forest from plantations of Eucalyptus globulus and Corymbia torelliana. Key biological factors that can act as barriers to hybridisation including flowering time, pollen and seed dispersal distances, crossability, hybrid fitness and the potential for backcrossing will be identified and used to develop strategies to reduce the risk of genetic pollution. The molecular differentiation between populations of the E. globulus complex, including plantations, will be studied to provide a genetic framework for the management of the genepool of this most important hardwood plantation species.Read moreRead less
Range dynamics and demographics of spatially structured populations under global change. Why are particular species present in some locations, but not others? This is a simple, fundamental ecological question, yet surprisingly, our answers on this point remain far from complete. Using an integrated, systems-based approach, we will determine the interplay between: (i) birth, death and movement rates, (ii) species interactions, and (iii) the constraints of the physical environment (temperature, ra ....Range dynamics and demographics of spatially structured populations under global change. Why are particular species present in some locations, but not others? This is a simple, fundamental ecological question, yet surprisingly, our answers on this point remain far from complete. Using an integrated, systems-based approach, we will determine the interplay between: (i) birth, death and movement rates, (ii) species interactions, and (iii) the constraints of the physical environment (temperature, rainfall, soil type), which determine the limits of species' ranges. Our models will provide Australian conservation managers with a novel, validated toolbox to explore the trade-offs, and synergies, inherent in trying to adapt to climate change and other stressors on biodiversity.Read moreRead less
Disease in endangered species: The importance of multiple-host infection and spatial structure. Pathogens are increasingly recognised as threats to endangered species. Managing such threats requires models to assess alternative strategies. Most current models deal with a single host and single pathogen, without spatial structure, although multiple-host pathogens pose the greatest conservation threats. This project develops a new generation of spatially-structured multiple-host models, and applie ....Disease in endangered species: The importance of multiple-host infection and spatial structure. Pathogens are increasingly recognised as threats to endangered species. Managing such threats requires models to assess alternative strategies. Most current models deal with a single host and single pathogen, without spatial structure, although multiple-host pathogens pose the greatest conservation threats. This project develops a new generation of spatially-structured multiple-host models, and applies them to two case studies. The first is the chytrid fungus that is thought to have lead to widespread declines and extinctions of frogs in Australia and overseas. The second is birdpox and malaria that have led to the extinction and endangerment of much of Hawaii's endemic avifauna.Read moreRead less