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
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
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100141
Funder
Australian Research Council
Funding Amount
$420,000.00
Summary
High-resolution ITRAX XRF core scanning facility for global change research. This facility will enable researchers to obtain high-resolution geochemical profiles in the study of environmental change and climate variability. It will provide archive data on the variation of density and chemical element composition along sediment and soil cores, rock cores, wood samples, speleothems and corals. These archives contain important information such as human activity, climate variability, water quality c ....High-resolution ITRAX XRF core scanning facility for global change research. This facility will enable researchers to obtain high-resolution geochemical profiles in the study of environmental change and climate variability. It will provide archive data on the variation of density and chemical element composition along sediment and soil cores, rock cores, wood samples, speleothems and corals. These archives contain important information such as human activity, climate variability, water quality changes, pollution histories, recent geomorphological change, land-use change, introduction of invasive species and the occurrence of bushfires. A better understanding of the occurrence and timing of these major environmental issues is of national and regional importance.Read moreRead less
European impact on Eastern Australian coastal lakes: understanding pre-impact conditions and post-settlement modification. Coastal lakes are vulnerable to European impact, yet little is known about how they have been altered in the last 200 years. For example: Are blue-green algal blooms a natural occurrence in coastal lakes? How long have freshwater lakes been isolated from the ocean? Preliminary results indicate that, at key sites, blue-green algae were more abundant before European settlement ....European impact on Eastern Australian coastal lakes: understanding pre-impact conditions and post-settlement modification. Coastal lakes are vulnerable to European impact, yet little is known about how they have been altered in the last 200 years. For example: Are blue-green algal blooms a natural occurrence in coastal lakes? How long have freshwater lakes been isolated from the ocean? Preliminary results indicate that, at key sites, blue-green algae were more abundant before European settlement and that coastal lakes thought to be permanently fresh have been exposed to the ocean within the past 200 years. By documenting change at representative sites, the project will identify which lake types are most vulnerable to impact. Results from the project will ensure that costly restoration efforts are not misplaced.Read moreRead less
Bottom-up effects of nutrients on estuarine fish related ecosystems. Over 84% of Australians live within 50 km of the coast, and have large impacts on coastal ecosystems, such as increasing nutrients in estuaries. Nutrients have strong bottom-up effects on fish ecosystems, especially during critical juvenile life history stages. Elevated nutrients can alter fish productivity and sustainability, having ecosystem and social implications. This project will combine experimental evidence with novel a ....Bottom-up effects of nutrients on estuarine fish related ecosystems. Over 84% of Australians live within 50 km of the coast, and have large impacts on coastal ecosystems, such as increasing nutrients in estuaries. Nutrients have strong bottom-up effects on fish ecosystems, especially during critical juvenile life history stages. Elevated nutrients can alter fish productivity and sustainability, having ecosystem and social implications. This project will combine experimental evidence with novel approaches of fatty acid tracers in food-webs and fish otolith (earbone) chemistry, to determine how nutrients affect fish ecosystems, recruitment, and survivorship. This project will provide information needed to create sustainable fisheries, to safeguard Australia's fisheries resources for future generations.Read moreRead less
The interplay between natural and human perturbations in structuring marine habitats. Empirical predictions of which could be the changes to natural habitats caused by human perturbations will increase the ability to prevent irreversible losses of biodiversity. This project will enable the planning of sound strategies for the conservation of valuable ecosystems, such as kelp forests, in view of the massive changes that will likely take place as a consequence of increasing exploitation of marine ....The interplay between natural and human perturbations in structuring marine habitats. Empirical predictions of which could be the changes to natural habitats caused by human perturbations will increase the ability to prevent irreversible losses of biodiversity. This project will enable the planning of sound strategies for the conservation of valuable ecosystems, such as kelp forests, in view of the massive changes that will likely take place as a consequence of increasing exploitation of marine resources and of global climatic changes. The scientific knowledge generated by this project is necessary for a sustainable development of coastal areas, which would guarantee the provision of goods and services to Australian future generations.Read moreRead less
Local and regional investigations into perturbations of marine habitat. Surprising changes to coastal ecology are forecast as increasing physical stresses (e.g. nutrient and sediment runoff) initiate changes to habitat. Lack of information about perturbations remains a major gap in marine ecology and coastal management. Multifactorial experiments will examine perturbations to one of temperate Australia's most widespread subtidal habitats (kelp forests) to test predictions derived from ecologic ....Local and regional investigations into perturbations of marine habitat. Surprising changes to coastal ecology are forecast as increasing physical stresses (e.g. nutrient and sediment runoff) initiate changes to habitat. Lack of information about perturbations remains a major gap in marine ecology and coastal management. Multifactorial experiments will examine perturbations to one of temperate Australia's most widespread subtidal habitats (kelp forests) to test predictions derived from ecological theory. Tests focus on (1) models about abrupt switches of habitat to contrasting states, and (2) responses among regions bearing striking differences in consumer control. These trans-Australian tests may change the way we view one of the world's most extensive temperate coastlines.Read moreRead less
Managing Australia's unique south coast. Innovative coastal management based on sound ecological understanding is a pressing issue in state and federal government. A federal initiative seeks integration of marine protected areas with other spatial arrangements for conservation of biodiversity. This proposal will inform the forthcoming selection of marine protected areas in South Australia. Significantly, it assesses whether adjacent land-use (natural vegetation, urbanisation, agriculture) can ....Managing Australia's unique south coast. Innovative coastal management based on sound ecological understanding is a pressing issue in state and federal government. A federal initiative seeks integration of marine protected areas with other spatial arrangements for conservation of biodiversity. This proposal will inform the forthcoming selection of marine protected areas in South Australia. Significantly, it assesses whether adjacent land-use (natural vegetation, urbanisation, agriculture) can enhance or compromise the utility of marine protected areas as a biodiversity repository.
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