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
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
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
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
Post-invasion trait-mediated indirect interactions: ecological and evolutionary impacts of the invasive European green crab. A multitude of ecological interactions determine the success and impacts of invasive species. We will advance current knowledge of the impacts of invasive European green crabs in Australia by detailing ecological and evolutionary interactions with native molluscs. This information will be useful in understanding the crab's invasion success and impacts on native communiti ....Post-invasion trait-mediated indirect interactions: ecological and evolutionary impacts of the invasive European green crab. A multitude of ecological interactions determine the success and impacts of invasive species. We will advance current knowledge of the impacts of invasive European green crabs in Australia by detailing ecological and evolutionary interactions with native molluscs. This information will be useful in understanding the crab's invasion success and impacts on native communities in Australia and other regions invaded by the crab worldwide. More broadly, this work will provide an evolutionary perspective of post-invasion processes that has been substantiated in terrestrial systems but is often lacking in marine systems. Read moreRead less