Drivers of fine scale genetic spatial structuring in aquatic organisms. Understanding factors that influence genetic spatial structure of species is essential for conserving biodiversity. Movement of freshwater organisms in riverine environments is severely constrained by dendritic structure of streams, variation in aridity, and geomorphology. The project aims to test hypotheses of how these factors impact genetic patterns across east-west climatic gradients in eastern Australia. For most aquati ....Drivers of fine scale genetic spatial structuring in aquatic organisms. Understanding factors that influence genetic spatial structure of species is essential for conserving biodiversity. Movement of freshwater organisms in riverine environments is severely constrained by dendritic structure of streams, variation in aridity, and geomorphology. The project aims to test hypotheses of how these factors impact genetic patterns across east-west climatic gradients in eastern Australia. For most aquatic species, research is limited on genetic patterns across spatial scales with varying riverine dendritic structure and rarely incorporates historical data. Uncovering genetic spatial structure in aquatic ecosystems is necessary for conservation management and predicting species movements in the current changing climate.Read moreRead less
Upland swamps and chains-of-ponds as unique and rare Australian river types: understanding their function to improve conservation and rehabilitation. Upland swamps and chains-of-ponds are nationally listed endangered ecosystems. They regulate water supply and quality in catchments. This project will deliver science on the physical and ecological function of these systems so conservation and rehabilitation initiatives within catchment action plans are effectively designed and implemented.
Robust strategies for restoring aquatic and riparian biodiversity. Effective restoration of Australia's degraded river ecosystems requires a diverse range of spatial data, models and a structured decision-making framework to predict ecological responses to alternative management interventions. This collaboration of universities and National Resource Management agencies will create the necessary tools to make and validate such predictions.
Resilience of lake ecosystems to water-level manipulation. Which lakes recover from fluctuations in water level and which do not? Manipulations of water levels in lakes will need to intensify as droughts become more frequent. This project will develop robust ways of forecasting how lakes will respond to changes in manipulations of water levels, to minimise extinctions and maintain aesthetics and water quality.
Resolving nitrogen and phosphorus transformations along subterranean estuary - sediment/water interface continuums in carbonate sands. Humans are modifying global nitrogen (N) and phosphorus (P) cycles at an alarming rate. The release of N and P into the environment drives eutrophication, one of the greatest threats to coastal ecosystems worldwide. Globally, there is little effort being made to control increasing N and P emissions. The transport of contaminated groundwater is a major source of N ....Resolving nitrogen and phosphorus transformations along subterranean estuary - sediment/water interface continuums in carbonate sands. Humans are modifying global nitrogen (N) and phosphorus (P) cycles at an alarming rate. The release of N and P into the environment drives eutrophication, one of the greatest threats to coastal ecosystems worldwide. Globally, there is little effort being made to control increasing N and P emissions. The transport of contaminated groundwater is a major source of N and P to the coastal zone and an overlooked driver of eutrophication. Yet, research into the processes that influence N and P transformation in groundwater are scarce, they neglect carbonate sand systems and have ignored the processes in key groundwater transition zones. This project will generate new knowledge that will help us understand the role that groundwater plays in coastal eutrophication.Read moreRead less
The effect of catchment revegetation on waterways. The effect of catchment revegetation on waterways. This project will examine the forms, transformations and fate of dissolved organic matter (DOM) in aquatic ecosystems and the link to human health with water treatment. Catchment revegetation is a management tool used to reduce excessive nutrient loads to waterways, which in turn causes poor water quality. However, catchment revegetation also produces DOM. DOM is typically poorly characterised a ....The effect of catchment revegetation on waterways. The effect of catchment revegetation on waterways. This project will examine the forms, transformations and fate of dissolved organic matter (DOM) in aquatic ecosystems and the link to human health with water treatment. Catchment revegetation is a management tool used to reduce excessive nutrient loads to waterways, which in turn causes poor water quality. However, catchment revegetation also produces DOM. DOM is typically poorly characterised and its effect on ecosystem health unclear. DOM also reacts with chlorine in water treatment plants to form disinfection by-products that affect human health. This research is expected to provide important new information to guide future catchment restoration efforts.Read moreRead less
Designing effective fish-friendly waterway culverts: integration of hydrodynamics and swimming performance. Man-made in-stream structures (for example, dams and road crossings) have contributed to major declines in native fish numbers, with more than 6,000 barriers to fish migration occurring in New South Wales alone. Recognising this, Fisheries New South Wales led the development of national guidelines for the design and construction of fish friendly road crossings. Unfortunately, these guideli ....Designing effective fish-friendly waterway culverts: integration of hydrodynamics and swimming performance. Man-made in-stream structures (for example, dams and road crossings) have contributed to major declines in native fish numbers, with more than 6,000 barriers to fish migration occurring in New South Wales alone. Recognising this, Fisheries New South Wales led the development of national guidelines for the design and construction of fish friendly road crossings. Unfortunately, these guidelines have little empirical backing. This project will integrate data on the swimming ability of Australian fish species with culvert hydrodynamic modelling to better understand fish requirements in and around road crossings. These data will strengthen national design guidelines and provide the tools engineers and planners need to balance fish migration with effective water management.Read moreRead less
Forecasting fish resilience to environmental change in northern Australia. This project aims to use a traits-based modelling framework, incorporating variability both within and between species, to forecast the resilience of freshwater fishes in northern Australia to impending environmental change. While northern Australian rivers are among the most pristine and productive on earth, they face profound change due to human activity. Emerging evidence suggests that flexibility in functional traits ....Forecasting fish resilience to environmental change in northern Australia. This project aims to use a traits-based modelling framework, incorporating variability both within and between species, to forecast the resilience of freshwater fishes in northern Australia to impending environmental change. While northern Australian rivers are among the most pristine and productive on earth, they face profound change due to human activity. Emerging evidence suggests that flexibility in functional traits (e.g. life history, physiology, behaviour, diet) may result in resilience to environmental change. This project aims to provide decision-makers with essential information and new tools to underpin future planning and resource management.Read moreRead less
Water, carbon, and economics: resolving complex linkages for river health. By linking landscapes into our emerging low-carbon economy, this project will investigate how land management practices can be improved through payments for ecosystem services. With a focus on water and carbon, the main goal is to develop mechanisms to support integrated land and water management at the catchment scale.
Dynamics and management of riverine freshwater lenses. Rivers are the main source of freshwater for many ecosystems in semi-arid zones. River water may seep into the floodplain aquifer, providing an accessible store of low-salinity water within freshwater lenses. The project aims to investigate lens dynamics using numerical groundwater models supported by extensive field data from the lower River Murray, where freshwater lenses are declining. The project aims to model lens extent, growth and dec ....Dynamics and management of riverine freshwater lenses. Rivers are the main source of freshwater for many ecosystems in semi-arid zones. River water may seep into the floodplain aquifer, providing an accessible store of low-salinity water within freshwater lenses. The project aims to investigate lens dynamics using numerical groundwater models supported by extensive field data from the lower River Murray, where freshwater lenses are declining. The project aims to model lens extent, growth and decline in response to natural variations in climate and to changes in land use, river regulation and groundwater pumping. Project results intend to evaluate management options to promote freshwater lenses, with the aim of improving river salinity and floodplain vegetation health.Read moreRead less