Enhancing nutrient retention in soils through management of microbial biomass. Soil microbial-processes are generally studied in relation to mineralisation of nutrients but rarely for their potential to retain nutrients and reduce nutrient leaching. We hypothesise that management of microbial immobilisation will enhance nutrient retention in nutrient enriched soils during seasonal rains. This hypothesis will be tested under strongly seasonal environments of southwest Australia where nutrient lea ....Enhancing nutrient retention in soils through management of microbial biomass. Soil microbial-processes are generally studied in relation to mineralisation of nutrients but rarely for their potential to retain nutrients and reduce nutrient leaching. We hypothesise that management of microbial immobilisation will enhance nutrient retention in nutrient enriched soils during seasonal rains. This hypothesis will be tested under strongly seasonal environments of southwest Australia where nutrient leaching from soils degrades quality of surface and groundwater. We will first investigate pathways and conditions leading to microbial immobilisation. We will then explore the regulation of substrate and nutrient conditions to promote such retention, and subsequently develop management interventions based on microbially-mediated nutrient retention.Read moreRead less
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
Assessment of the Mass Flux in a Benthic Boundary Layer of a Stratified Lake. Understanding the underlying processes responsible for Benthic Bundary Layer (BBL) mass flux in stratified lakes is of fundamental ecological importance. By verifying the ability of the current Centre for Water Research hydrodynamics models to reproduce the dynamics of the BBL, Australia will cement its position as an international leader in the development of technologies to guide the management of lakes, reservoirs, ....Assessment of the Mass Flux in a Benthic Boundary Layer of a Stratified Lake. Understanding the underlying processes responsible for Benthic Bundary Layer (BBL) mass flux in stratified lakes is of fundamental ecological importance. By verifying the ability of the current Centre for Water Research hydrodynamics models to reproduce the dynamics of the BBL, Australia will cement its position as an international leader in the development of technologies to guide the management of lakes, reservoirs, estuaries and coastal areas. Furthermore, these water bodies are important sources and sinks of carbon and the extent to which they contribute to the national and international carbon inventory can be assessed using this technology.Read moreRead less
Sources of genetic and phenotypic variation in sexual selection. This project will contribute towards Australia's reputation as a country where excellent and original research in evolutionary biology is conducted. The project will focus on the evolution of mate choice in the Western Australian rainbowfish, which has never been formally studied. Our research will therefore work towards a better understanding of Australian native fauna. Conceptually, the work encompasses new and innovative experim ....Sources of genetic and phenotypic variation in sexual selection. This project will contribute towards Australia's reputation as a country where excellent and original research in evolutionary biology is conducted. The project will focus on the evolution of mate choice in the Western Australian rainbowfish, which has never been formally studied. Our research will therefore work towards a better understanding of Australian native fauna. Conceptually, the work encompasses new and innovative experimental procedures that will address fundamental questions in sexual selection. The results will ultimately be geared towards publication in the highest ranking journals, thereby promoting Australian science on the international stage. Australian science will further benefit from the training of young scientists.Read moreRead less
Postcopulatory sexual selection and intraspecific variation in sperm competition traits. This project will contribute towards Australia's burgeoning reputation as a country where excellent and original research in behavioural ecology and evolution is conducted. By focusing on the evolution and function of sperm and genitalic traits, the project will address fundamental questions at the core of contemporary evolutionary research, thereby yielding results that will have a significant international ....Postcopulatory sexual selection and intraspecific variation in sperm competition traits. This project will contribute towards Australia's burgeoning reputation as a country where excellent and original research in behavioural ecology and evolution is conducted. By focusing on the evolution and function of sperm and genitalic traits, the project will address fundamental questions at the core of contemporary evolutionary research, thereby yielding results that will have a significant international impact. Australian science will further benefit from the research fellow's established collaborations with international scientists and through the training of young scientists.Read moreRead less
Factors controlling phytoplankton patchiness in a seasonally stratified lake. This project will determine what processes result in the formation of phytoplankton patches in lakes, over what scale, and how they can be parameterized into models to assist in managing aquatic systems. This will allow key parameters to be measured at the correct time and space scales. The Controlled Lagrangian Drogue coupled with correctly parameterized hydrodynamic and water quality models will provide the Austra ....Factors controlling phytoplankton patchiness in a seasonally stratified lake. This project will determine what processes result in the formation of phytoplankton patches in lakes, over what scale, and how they can be parameterized into models to assist in managing aquatic systems. This will allow key parameters to be measured at the correct time and space scales. The Controlled Lagrangian Drogue coupled with correctly parameterized hydrodynamic and water quality models will provide the Australian and International water industry with tools to measure and predict phytoplankton patchiness and make decisions about water quality treatment, offtake regimes and reservoir management. This will minimize the economic costs of water quality management and enhance the security of the quality of our water resources. Read moreRead less
Maximizing reservoir water quality security through the use of a Lake Diagnostic System (LDS) and a Controlled Lagrangian Drogue (CLD). It is proposed to build on recent advancements in limnological research and existing measurement technologies to develop the hardware, algorithms and software to form a unique real time reservoir water quality management system, driven by minimal measurement inputs. This will remove the reliance on extensive expensive reservoir monitoring, previously necessary ....Maximizing reservoir water quality security through the use of a Lake Diagnostic System (LDS) and a Controlled Lagrangian Drogue (CLD). It is proposed to build on recent advancements in limnological research and existing measurement technologies to develop the hardware, algorithms and software to form a unique real time reservoir water quality management system, driven by minimal measurement inputs. This will remove the reliance on extensive expensive reservoir monitoring, previously necessary to characterize the lake spatial variability and seasonality, for full 3D modelling. This project will deliver to industry: two measurement tools to simplify reservoir monitoring, the LDS and CLD; and software tools to manage real time data collection, provide decision support to reservoir managers and to enable ?on-demand? scenario predictions.Read moreRead less
Between a hot place & hypoxia: Quantifying fish-kill risk in inland rivers. Native fish populations in Australian ephemeral rivers are highly valued but are subject to widespread decline. During drought waterholes serve as critical refuges for native fish, however thermal extremes and hypoxia (lack of oxygen) have led to regular fish-kill events. Whilst we know the general conditions that lead to fish-kills, we do not have a clear understanding of why some species are more tolerant than others, ....Between a hot place & hypoxia: Quantifying fish-kill risk in inland rivers. Native fish populations in Australian ephemeral rivers are highly valued but are subject to widespread decline. During drought waterholes serve as critical refuges for native fish, however thermal extremes and hypoxia (lack of oxygen) have led to regular fish-kill events. Whilst we know the general conditions that lead to fish-kills, we do not have a clear understanding of why some species are more tolerant than others, or how we can help decision-makers anticipate fish-kill risks. This project will combine laboratory ecophysiology investigations and novel field monitoring techniques to develop a next-generation fish habitat model for stakeholders to use to assess fish-kill risks and plan for restoration. 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
Predicting plankton patchiness in lakes using a high resolution sampling system. This research will benefit Australian Society through a better understanding and prediction of the response of aquatic systems to major shifts in the environment. Eutrophication and toxic algal blooms represent serious threats to the security of water supplies in Australia and elsewhere. Through development of high resolution technology (SPS), this project will provide the necessary knowledge and data for producing ....Predicting plankton patchiness in lakes using a high resolution sampling system. This research will benefit Australian Society through a better understanding and prediction of the response of aquatic systems to major shifts in the environment. Eutrophication and toxic algal blooms represent serious threats to the security of water supplies in Australia and elsewhere. Through development of high resolution technology (SPS), this project will provide the necessary knowledge and data for producing management tools capable of detailed predictions of the behaviour of aquatic systems. Successful management of Australian waters relies heavily on a better understanding of the scale dependent processes which govern the response to external perturbations such as increased nutrient export and consequent eutrophication.Read moreRead less