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Establishing baseline ecological conditions for the Lower Lakes, South Australia: the applications of palaeoecology to sustainable resource management. The Lower Lakes of the Murray River are in a critical ecological state due to record low water levels. Management of these lakes needs to integrate water security demands with maintaining healthy ecosystem functions. Proposed management options such as allowing seawater incursion and the construction of a weir to impede freshwater flows are based ....Establishing baseline ecological conditions for the Lower Lakes, South Australia: the applications of palaeoecology to sustainable resource management. The Lower Lakes of the Murray River are in a critical ecological state due to record low water levels. Management of these lakes needs to integrate water security demands with maintaining healthy ecosystem functions. Proposed management options such as allowing seawater incursion and the construction of a weir to impede freshwater flows are based on assumptions about what the Lakes were like naturally (pre-European). This study will reconstruct environmental variability within the Lower Lakes over the past 7000 years, concentrating on salinity to document the extent of marine incursion, and pH to examine the impacts of acid sulphate release from exposed sediments during low flow events. Read moreRead less
Multiphase flow and transport in complex coastal wetland systems. Salt marshes play an essential role in maintaining Australia's coastal bio-diversity. They also function as barriers to fluxes of terrestrial pollutants to our coastal sea. Australia has a large number of salt marshes listed by the Ramsar Convention as coastal wetlands of international importance but many of them are subject to loss and degradation due to competing land uses. This project, examining in detail the flow and transpor ....Multiphase flow and transport in complex coastal wetland systems. Salt marshes play an essential role in maintaining Australia's coastal bio-diversity. They also function as barriers to fluxes of terrestrial pollutants to our coastal sea. Australia has a large number of salt marshes listed by the Ramsar Convention as coastal wetlands of international importance but many of them are subject to loss and degradation due to competing land uses. This project, examining in detail the flow and transport processes in marsh soils, will lead to (1) better understanding of the marsh's response to anthropogenic stress; and (2) improvement of strategies and methods for marsh wetland preservation and restoration.Read moreRead less
Multi-Scale Analysis of the Vulnerability of Coral Reefs to Ocean Acidification. The Great Barrier Reef (GBR) is one of Australia's biggest icons, and represents more than 10% of the world's coral reefs. It is a World Heritage Area and is home to more than 1 million species. The GBR provides Australia with more than $6 billion in annual national revenue. To help manage for sustained resilience of the GBR in an era of climate change, Australia needs to understand the major threats, in particular ....Multi-Scale Analysis of the Vulnerability of Coral Reefs to Ocean Acidification. The Great Barrier Reef (GBR) is one of Australia's biggest icons, and represents more than 10% of the world's coral reefs. It is a World Heritage Area and is home to more than 1 million species. The GBR provides Australia with more than $6 billion in annual national revenue. To help manage for sustained resilience of the GBR in an era of climate change, Australia needs to understand the major threats, in particular ocean acidification. By producing an innovative framework for assessing acidification risks, the project will help Australia demonstrate continued stewardship of one of the world's richest and most sensitive ecosystems.Read moreRead less
Management of fire-prone shrublands in Western Australia: testing the effects of frequent fire. Understanding the impacts of different fire regimes (frequency, intensity, patchiness, size of fires) on high diversity shrublands will help CALM (the land managers) develop fire management prescriptions that ensure the conservation of rare and threatened flora, and maintain biodiversity. The research will identify relationships between weather, fuel and fire behaviour that is currently lacking for s ....Management of fire-prone shrublands in Western Australia: testing the effects of frequent fire. Understanding the impacts of different fire regimes (frequency, intensity, patchiness, size of fires) on high diversity shrublands will help CALM (the land managers) develop fire management prescriptions that ensure the conservation of rare and threatened flora, and maintain biodiversity. The research will identify relationships between weather, fuel and fire behaviour that is currently lacking for shrubland vegetation types. It offers advances in our understanding of ecosystem structure and function, with applied value in fire management for conservation and asset protection. The project contributes to development of ecological theory, and provides a scientific basis for improved management of Australia's unique natural heritage.Read moreRead less
Kelp forest ecosystems near and far: Putting a new theory explaining dynamic ecological systems to the test. Few, if any, ecological models account for the biological diversity and observed vulnerability of ecosystems, from the molecular to the oceanic scale. This project aims to investigate kelp forests in ways that integrate previously disparate approaches to the study of ecosystems in order to prove the value of a novel framework for understanding how broad-scale and local phenomena interrela ....Kelp forest ecosystems near and far: Putting a new theory explaining dynamic ecological systems to the test. Few, if any, ecological models account for the biological diversity and observed vulnerability of ecosystems, from the molecular to the oceanic scale. This project aims to investigate kelp forests in ways that integrate previously disparate approaches to the study of ecosystems in order to prove the value of a novel framework for understanding how broad-scale and local phenomena interrelate to maintain the diversity and function of ecosystems or to provoke their decline, transition or collapse. This new conceptualisation of ecosystem processes will assist in forecasting the consequences of their management and the effects of external stimuli on normally robust systems. 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
Factors controlling marine food webs: consumer vs. nutrient limitation of mobile invertebrates and algae. An understanding of the strength of interactions in marine food webs is crucial to predicting change in coastal habitats due to human activities. The outcomes of this research will indicate the relative importance of changes in nutrient inputs from terrestrial runoff (eutrophication) and predation pressures (via overfishing) - both of which may strongly affect the structure of marine habitat ....Factors controlling marine food webs: consumer vs. nutrient limitation of mobile invertebrates and algae. An understanding of the strength of interactions in marine food webs is crucial to predicting change in coastal habitats due to human activities. The outcomes of this research will indicate the relative importance of changes in nutrient inputs from terrestrial runoff (eutrophication) and predation pressures (via overfishing) - both of which may strongly affect the structure of marine habitats - on an extremely abundant and diverse component of coastal marine habitats.Read moreRead less
Unraveling Pathways of Nitrogen Cycling in the Sediments of Shallow Coastal Systems using Biomarkers, Stable Isotope Tracer Experiments and Modeling. Many 100's of millions of dollars are likely to be spent over the next ten years on the management of nitrogen enrichment, and protection of biodiversity, in Australia's coastal waters. This project will significantly advance our understanding of how organisms from bacteria to macrofauna affect the functioning of our coastal systems. Understanding ....Unraveling Pathways of Nitrogen Cycling in the Sediments of Shallow Coastal Systems using Biomarkers, Stable Isotope Tracer Experiments and Modeling. Many 100's of millions of dollars are likely to be spent over the next ten years on the management of nitrogen enrichment, and protection of biodiversity, in Australia's coastal waters. This project will significantly advance our understanding of how organisms from bacteria to macrofauna affect the functioning of our coastal systems. Understanding the role that organisms at all levels play in the functioning of coastal ecosystems is the first step towards protecting this biodiversity. As such the findings from this research will have direct implications to the management, rehabilitation and protection of waterways (including biodiversity) in Australia. Read moreRead less
Resolving uncertainty over the importance of N-fixation versus denitrification in coastal systems. Nutrient enrichment of coastal waters is a significant national and international problem requiring urgent action. Despite many studies and many millions of dollars in research funding we know virtually nothing about the relative importance of the major nitrogen cycling pathways, N-fixation and denitrification. Many hundred's of millions of dollars are likely to be spent over the next ten years on ....Resolving uncertainty over the importance of N-fixation versus denitrification in coastal systems. Nutrient enrichment of coastal waters is a significant national and international problem requiring urgent action. Despite many studies and many millions of dollars in research funding we know virtually nothing about the relative importance of the major nitrogen cycling pathways, N-fixation and denitrification. Many hundred's of millions of dollars are likely to be spent over the next ten years on the management of nitrogen enrichment of Australia's coastal waters. This study will use a new method for directly measuring N-fixation to resolve uncertainty over the importance of N-fixation versus denitrification in coastal systems; information which is critical for the efficient allocation of management resources.Read moreRead less
Assessing and understanding ecological changes in highly disturbed estuaries: addressing the complexity of multiple stressors. The conservation of estuarine ecosystems is necessary due to the intrinsic value of their biodiversity and the ecosystem services they provide to humans (food, tourism, recreation). This project will identify anthropogenic stressors that pose ecological threats to estuaries. We will identify indicator species and biomarkers that are cost-effective signs of ecological cha ....Assessing and understanding ecological changes in highly disturbed estuaries: addressing the complexity of multiple stressors. The conservation of estuarine ecosystems is necessary due to the intrinsic value of their biodiversity and the ecosystem services they provide to humans (food, tourism, recreation). This project will identify anthropogenic stressors that pose ecological threats to estuaries. We will identify indicator species and biomarkers that are cost-effective signs of ecological change, useful to any manager of Australian estuaries. The simultaneous assessment of multiple stressors is a great advance in the ecological assessment of estuarine health. We will develop a manual of methods and indicators for measuring the success of environmental management programs.Read moreRead less