Testing the Flood Pulse Concept for rivers with variable flow regimes. For floodplain rivers the major unifying conceptual model linking hydrology, biogeochemistry and ecology is the Flood Pulse Concept (FPC). The model is based on rivers that have a seasonally predictable and long duration inundation of floodplain habitats. Recent reviews of the FPC indicate that the model needs to be broadened to describe the function of rivers with more variable flow regimes. This project will test some of th ....Testing the Flood Pulse Concept for rivers with variable flow regimes. For floodplain rivers the major unifying conceptual model linking hydrology, biogeochemistry and ecology is the Flood Pulse Concept (FPC). The model is based on rivers that have a seasonally predictable and long duration inundation of floodplain habitats. Recent reviews of the FPC indicate that the model needs to be broadened to describe the function of rivers with more variable flow regimes. This project will test some of the predictions of the FPC for variable dryland rivers by investigating how food webs in the channels of a floodplain reach respond to flows of different magnitude, seasonal timing and duration.Read moreRead less
Mining, irrigation, and groundwater: Towards a reliable protocol for assessing the impacts of extraction on groundwater fauna and ecology. Groundwater fluctuations associated with mining and increased irrigation demands, potentially threaten many of Australia's unique groundwater invertebrates (stygofauna) with extinction. Stygofauna represent a hidden store of biodiversity and are thought to have a critical, but poorly understood, role in enhancing groundwater quality. Environmentally sustainab ....Mining, irrigation, and groundwater: Towards a reliable protocol for assessing the impacts of extraction on groundwater fauna and ecology. Groundwater fluctuations associated with mining and increased irrigation demands, potentially threaten many of Australia's unique groundwater invertebrates (stygofauna) with extinction. Stygofauna represent a hidden store of biodiversity and are thought to have a critical, but poorly understood, role in enhancing groundwater quality. Environmentally sustainable development of groundwater resources is hampered by a dearth of information on the ecological needs of stygofauna and how they respond to human-induced change. Using field and laboratory experiments, we aim to determine how water table fluctuations threaten stygofauna. From our results we will develop sampling and management protocols to monitor and protect stygofauna communities.Read moreRead less
Environmental risk assessment of acid sulfate soil formation and pollutant generation in Swan Coastal Plain. The urgency and importance of securing water sources for human use in a sustainable manner is dictated by drying climate and rapid population expansion in Australia. Dropping groundwater levels (less recharge, increased abstraction, enhanced drainage) result in formation of acid sulfate soils in oxidised layers that contain acid-bearing minerals. This project will produce an environmental ....Environmental risk assessment of acid sulfate soil formation and pollutant generation in Swan Coastal Plain. The urgency and importance of securing water sources for human use in a sustainable manner is dictated by drying climate and rapid population expansion in Australia. Dropping groundwater levels (less recharge, increased abstraction, enhanced drainage) result in formation of acid sulfate soils in oxidised layers that contain acid-bearing minerals. This project will produce an environmental risk assessment framework as a basis for (i) educated decisions regarding land development and soil disturbance vs conservation as well as (ii) identifying areas suitable for water abstraction from groundwater resources. This will ensure sustainable use of precious groundwater resources in this drying continent of ours.Read moreRead less
Risks to human health and the ecosystem from feral pigs in Perth metropolitan water catchments. This project aims to investigate the potential risk feral pigs pose to public health through the dissemination of water borne pathogens within water catchment areas, and to investigate their role in the maintenance and spread of diseases of public and animal health concern in the south west of Western Australia. As well as providing a frontline approach to protecting our water supplies, this project ....Risks to human health and the ecosystem from feral pigs in Perth metropolitan water catchments. This project aims to investigate the potential risk feral pigs pose to public health through the dissemination of water borne pathogens within water catchment areas, and to investigate their role in the maintenance and spread of diseases of public and animal health concern in the south west of Western Australia. As well as providing a frontline approach to protecting our water supplies, this project will also provide valuable data on the nature and extent of the risk feral pigs pose to biodiversity conservation and the environment generally. The outcomes of this research will provide a scientific basis for the development of prioritised strategies for the control of feral pigs in Western Australia.Read moreRead less
Integration of Surface Water and Ground Water Processes in Coastal Catchments. The hydrologic processes which describe surface water and groundwater movement often occur at completely different temporal and spatial scales. These two distinct flow regimes, however, are intrinsically coupled in coastal catchments in Australia. The superposition of local flow systems on a regional groundwater framework results in complex interactions which are difficult to accurately predict with existing numeric ....Integration of Surface Water and Ground Water Processes in Coastal Catchments. The hydrologic processes which describe surface water and groundwater movement often occur at completely different temporal and spatial scales. These two distinct flow regimes, however, are intrinsically coupled in coastal catchments in Australia. The superposition of local flow systems on a regional groundwater framework results in complex interactions which are difficult to accurately predict with existing numerical models, and are not truly understood even at the conceptual level. This work aims to study a single catchment at a very detailed level to allow for the production of a new integrated approach to the simulation of the complete hydrologic systemRead moreRead less
Fire management of complex rehabilitated forests - quantifying and understanding spatial variability of forest structure and fuels. Up to 5 million ha of forest is burnt by bushfire in Australia in severe fire years. The cost of fire suppression in 2002/3 in WA was in excess of 12 million dollars. Consequently, development and application of technologies and knowledge for enhancing fire management and reducing wildfire risk is of high priority and substantial economic, social and environmental b ....Fire management of complex rehabilitated forests - quantifying and understanding spatial variability of forest structure and fuels. Up to 5 million ha of forest is burnt by bushfire in Australia in severe fire years. The cost of fire suppression in 2002/3 in WA was in excess of 12 million dollars. Consequently, development and application of technologies and knowledge for enhancing fire management and reducing wildfire risk is of high priority and substantial economic, social and environmental benefit. The opportunity to conduct experimental fires across a complex landscape will enable calibration and development of technologies not previously possible. This research will define the way prescribed fire is used to integrate young rehabilitated forest into management of the broader landscape and develop more cost-effective tools for fire management.Read moreRead less
Increasing sandalwood (Santalum spicatum) recruitment in regional Western Australia through mammal conservation. The highly prized sandalwood is the basis of an industry that employs over 100 people and generates $12 million export income annually in regional WA. Natural recruitment of sandalwood is poor. This project will build on research, conducted by Murdoch University and the Forest Products Commission, that indicates natural recruitment of the tree is greatly enhance in the presence of nat ....Increasing sandalwood (Santalum spicatum) recruitment in regional Western Australia through mammal conservation. The highly prized sandalwood is the basis of an industry that employs over 100 people and generates $12 million export income annually in regional WA. Natural recruitment of sandalwood is poor. This project will build on research, conducted by Murdoch University and the Forest Products Commission, that indicates natural recruitment of the tree is greatly enhance in the presence of native rat-kangaroos who cache the seeds. This project will train an APA(I) postgraduate through an industry based project that will evaluate increased recruitment of sandalwood by native mammal caching. Many of these mammals are Conservation Dependent or Threatened with extinction.Read moreRead less
Linking River Health with Urban Drains: the Swan-Canning River Case Study. The continuous deterioration of the Swan-Canning estuary in WA has triggered the need to identify the effects of chronic contamination on biota. Contaminant entry points into the river have been identified as being urban drains and the Helena river. The aim of this research is to relate effects observed in 'drain fish' to effects observed in 'river fish'. Biomarkers of fish health such as EROD and ECOD activities, DNA dam ....Linking River Health with Urban Drains: the Swan-Canning River Case Study. The continuous deterioration of the Swan-Canning estuary in WA has triggered the need to identify the effects of chronic contamination on biota. Contaminant entry points into the river have been identified as being urban drains and the Helena river. The aim of this research is to relate effects observed in 'drain fish' to effects observed in 'river fish'. Biomarkers of fish health such as EROD and ECOD activities, DNA damage, stress proteins, biliary metabolites, etc. will be compared between drain and river fishes. Chemical analysis of contaminants will complement biomarker determinations. The outcomes will be applicable Australia wide, and provide information to better manage urban drain systems to reduce their impacts on native biota.Read moreRead less
The cause(s) and management of the Eucalyptus gomphocephala decline epidemic in Western Australia. Tree declines are prevalent throughout rural and metropolitan Australia. Apart from loss of habitat, biodiversity, shade and aesthetics, tree death is a financial burden to land managers. This project will increase our understanding of factors that drive tree declines by: (a) understanding changes in hydrological processes that occur through declining rainfall or ground water use; (b) exploring t ....The cause(s) and management of the Eucalyptus gomphocephala decline epidemic in Western Australia. Tree declines are prevalent throughout rural and metropolitan Australia. Apart from loss of habitat, biodiversity, shade and aesthetics, tree death is a financial burden to land managers. This project will increase our understanding of factors that drive tree declines by: (a) understanding changes in hydrological processes that occur through declining rainfall or ground water use; (b) exploring tree nutrient requirements in relation to soil fertility and land management; (c) identifying revegetation strategies for disturbed lands; and (c) through linking environmental correlates with tuart decline. It will provide the community with tools to mitigate decline such as though improved revegetation strategiesRead moreRead less
Dynamics of woody vegetation and water in the central Pilbara - understanding and managing for environmental change. The development and application of technologies and knowledge for enhancing sustainable management of semi-arid environments are of high priority and significant economic, social and environmental benefit. The value of iron ore exports from the Pilbara is expected to grow by nearly 30% in the next year, while the projected production of iron ore over the next 4 years is expected t ....Dynamics of woody vegetation and water in the central Pilbara - understanding and managing for environmental change. The development and application of technologies and knowledge for enhancing sustainable management of semi-arid environments are of high priority and significant economic, social and environmental benefit. The value of iron ore exports from the Pilbara is expected to grow by nearly 30% in the next year, while the projected production of iron ore over the next 4 years is expected to be valued in excess of 60 billion dollars. However, continued and rapid expansion in the development of these resources is contingent on environmental oversight and adoption of an adaptive management approach. This research will thus make a major contribution to understanding the Pilbara ecosystems that provide tremendous economic wealth for all Australians.Read moreRead less