Density regulation as a major determinant of population persistence: advancing empirical and theoretical approaches to conserve biodiversity. Without efficient application of limited conservation resources, more species will go extinct and invasive species will continue to proliferate. With a better understanding of extinction processes, a higher benefit:cost ratio will ensure better outcomes for biodiversity. We will directly address (1) the sustainable use of Australia's biodiversity by provid ....Density regulation as a major determinant of population persistence: advancing empirical and theoretical approaches to conserve biodiversity. Without efficient application of limited conservation resources, more species will go extinct and invasive species will continue to proliferate. With a better understanding of extinction processes, a higher benefit:cost ratio will ensure better outcomes for biodiversity. We will directly address (1) the sustainable use of Australia's biodiversity by providing evidence-based support for minimum viable population size targets to avoid extinction; (2) responding to climate change by determining the species- and environmentally specific contexts leading to elevated risks of extinction; and (3) protecting Australia from invasive diseases and pests by determining density targets that maximise eradication success.Read moreRead less
Applying search theory for eradicating invasive species. Invasive species have major economic and environmental impacts in Australia and are a major cause of extinctions worldwide. Monitoring is crucial for the timely control of invasive species in sensitive environments. Early detection increases the probability of eradication and increased accuracy in detection reduces the impact of control programs on non-target species. Efficient monitoring also is crucial in determining whether eradication ....Applying search theory for eradicating invasive species. Invasive species have major economic and environmental impacts in Australia and are a major cause of extinctions worldwide. Monitoring is crucial for the timely control of invasive species in sensitive environments. Early detection increases the probability of eradication and increased accuracy in detection reduces the impact of control programs on non-target species. Efficient monitoring also is crucial in determining whether eradication has succeeded. Search Theory has been applied for over 60 years in a wide range of non-biological monitoring problems, resulting in large increases in target detection rates. Gains of a similar magnitude in invasive species detection would greatly enhance Australia's capacity to manage these threats.Read moreRead less
A landscape-scale experimental test of factors driving mammal declines in northern Australia. Australia has suffered the highest rate of modern mammal extinctions in the world. Foxes have been largely responsible for this extinction in southern Australia and probably also Central Australia. However the decline in mammals in northern Australia has occurred later than that in the south, and in the absence of foxes. We will adopt an experimental approach to determine the mechanisms driving mammal d ....A landscape-scale experimental test of factors driving mammal declines in northern Australia. Australia has suffered the highest rate of modern mammal extinctions in the world. Foxes have been largely responsible for this extinction in southern Australia and probably also Central Australia. However the decline in mammals in northern Australia has occurred later than that in the south, and in the absence of foxes. We will adopt an experimental approach to determine the mechanisms driving mammal declines and extinctions in northern Australia. Populations of brush-tail tree rats (Conilurus penicillatus) will be translocated to suitable habitat on mainland sites that experience different fire regimes and predation pressures.Read moreRead less
Early warning of cyanobacteria blooms in drinking water reservoirs by means of evolutionary algorithms. Estimated economic cost of cyanobacteria blooms to Australia are at $150 million p.a. Early warning for cyanobacteria blooms will inform water managers to conduct preventive and operational control in reservoirs and water works, and significantly lower risks for public health and costs for monitoring and treatment. Resulting early warning systems will be novel prototypes for cyanobacteria bloo ....Early warning of cyanobacteria blooms in drinking water reservoirs by means of evolutionary algorithms. Estimated economic cost of cyanobacteria blooms to Australia are at $150 million p.a. Early warning for cyanobacteria blooms will inform water managers to conduct preventive and operational control in reservoirs and water works, and significantly lower risks for public health and costs for monitoring and treatment. Resulting early warning systems will be novel prototypes for cyanobacteria blooms in drinking water reservoirs based on forecasting models adaptable to environmental and climate change. Model-based scenario analysis will also assist in informed decisions on effects of drought, injection of recycled water and global warming to cyanobacteria growth.Read moreRead less
Origins of invertebrate fauna in Australia since the Cretaceous: a molecular approach using bees as a model taxon. Australia's unique biota is vital for ecological, recreational, and economic reasons, and is a major resource that we need to understand and manage. This project is aimed at understanding the genesis of this biota, and will help us anticipate what lies ahead, in terms of the impact of exotic species and climate change. Benefits also include developing world class scientific profiles ....Origins of invertebrate fauna in Australia since the Cretaceous: a molecular approach using bees as a model taxon. Australia's unique biota is vital for ecological, recreational, and economic reasons, and is a major resource that we need to understand and manage. This project is aimed at understanding the genesis of this biota, and will help us anticipate what lies ahead, in terms of the impact of exotic species and climate change. Benefits also include developing world class scientific profiles with consequent flow-on effects, including international collaboration, and enhanced teaching and awareness of native biota. The project will maintain our already strong track record for training a large number of postgraduate and honours students in benchmark evolutionary research techniques. Read moreRead less
Regressive evolution of eyes in subterranean water beetles of arid-zone Australia: A comparative phylogenetic approach. Reduction or total loss of non-functional characters are common evolutionary phenomena, but little is known of the genetic basis of this regressive evolution. This project will use a phylogenetic framework to investigate the forces responsible for evolution of eyelessness in subterranean water beetles, by studying molecular genetic variation in three key eye developmental genes ....Regressive evolution of eyes in subterranean water beetles of arid-zone Australia: A comparative phylogenetic approach. Reduction or total loss of non-functional characters are common evolutionary phenomena, but little is known of the genetic basis of this regressive evolution. This project will use a phylogenetic framework to investigate the forces responsible for evolution of eyelessness in subterranean water beetles, by studying molecular genetic variation in three key eye developmental genes. The water beetles are explicitly suitable to address the questions due to their numerous independently evolved eyeless species and relatively old age of divergence from surface relatives. The research will provide a major new perspective on regressive evolution and the relationship between gene structure and function.Read moreRead less
Impact of Phytophthora cinnamomi on native vegetation in South Australia - understanding underlying mechanisms to improve management. The disease Phytophthora dieback threatens many Australian native plants and the animals that rely on them for food and habitat. This research will provide new knowledge of the susceptibility to the disease of plant species that are threatened with extinction, and of the effects of plant and soil microbial community composition on patterns of spread of the disease ....Impact of Phytophthora cinnamomi on native vegetation in South Australia - understanding underlying mechanisms to improve management. The disease Phytophthora dieback threatens many Australian native plants and the animals that rely on them for food and habitat. This research will provide new knowledge of the susceptibility to the disease of plant species that are threatened with extinction, and of the effects of plant and soil microbial community composition on patterns of spread of the disease. This knowledge will assist the recovery of rare and threatened plant species and ecological communities statewide and nationwide. Read moreRead less
Building sound ecological restoration strategies for endangered amphibians. This project integrates the principles of ecology and restoration ecology to secure the persistence of a population of an endangered frog in the context of a large urban renewal and ecological rehabilitation precinct at the Sydney Olympic Park. Habitat rehabilitation at the site provides an unrivalled opportunity for ecology to provide robust scientific direction and support for conservation management practices and deve ....Building sound ecological restoration strategies for endangered amphibians. This project integrates the principles of ecology and restoration ecology to secure the persistence of a population of an endangered frog in the context of a large urban renewal and ecological rehabilitation precinct at the Sydney Olympic Park. Habitat rehabilitation at the site provides an unrivalled opportunity for ecology to provide robust scientific direction and support for conservation management practices and develops the site as a model site illustrating adaptive management practices. The project investigates the role of two threatening processes in amphibian decline in a habitat management context and the outcomes have wide implications for the global amphibian decline. 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
Planning for a transformed future: Modelling synergistic climate change and land use impacts on biodiversity. Climate change poses a dire threat to Australia's biodiversity and natural resources due to its all-encompassing reach and the speed at which human-driven changes are taking place in already heavily modified systems. The proposed research, on modelling the synergistic impacts of anthropogenic threats, will provide new knowledge and innovative solutions for protecting unique ecosystems fa ....Planning for a transformed future: Modelling synergistic climate change and land use impacts on biodiversity. Climate change poses a dire threat to Australia's biodiversity and natural resources due to its all-encompassing reach and the speed at which human-driven changes are taking place in already heavily modified systems. The proposed research, on modelling the synergistic impacts of anthropogenic threats, will provide new knowledge and innovative solutions for protecting unique ecosystems facing severe environmental challenges this century. The validation of these new methods, which aim to capture ecological responses to global change, will represent a major and timely addition to the national research capability on climate change adaptation, and add to Australia's reputation as a global leader in the field of ecology.Read moreRead less