Development of a mechanistic model of marine biological activity. The development of predictive models of marine biological activity lags that in physical oceanography. While modellers of ocean circulation use primarily physical laws, biological processes have typically been modelled using empirical approximations. Many biological processes in the ocean, however, are constrained by quantifiable biophysical limits. This study aims to improve our ability to predict the dynamics of biological po ....Development of a mechanistic model of marine biological activity. The development of predictive models of marine biological activity lags that in physical oceanography. While modellers of ocean circulation use primarily physical laws, biological processes have typically been modelled using empirical approximations. Many biological processes in the ocean, however, are constrained by quantifiable biophysical limits. This study aims to improve our ability to predict the dynamics of biological populations in the marine environment by the development of a model based on mechanistic descriptions of organisms interacting with their environment. The model's performance will be assessed by its ability to predict in situ and remotely sensed data from Australian waters.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
Quantifying the role of salps in marine food webs and organic carbon export. Australia has recently committed significant resources to the observation and forecasting of ocean temperature and circulation that will vastly improve the understanding of environmental forcing of regional scale biological processes. This project will use ocean circulation hindcasts, ship-board measurements and laboratory studies to capture the dynamics of the zooplankton community, and in particular a fast-growing cla ....Quantifying the role of salps in marine food webs and organic carbon export. Australia has recently committed significant resources to the observation and forecasting of ocean temperature and circulation that will vastly improve the understanding of environmental forcing of regional scale biological processes. This project will use ocean circulation hindcasts, ship-board measurements and laboratory studies to capture the dynamics of the zooplankton community, and in particular a fast-growing class of gelatinous zooplankton, the salps, in the waters off southeast Australia. During bloom events, salps can alter the functioning of marine ecosystems. This project will quantify the impact of salp blooms on fish resources and ocean uptake of carbon in southeast Australian waters.Read moreRead less
Development of a coupled physical-biological model of size-structured biota in marine waters. The marine environment contains highly valued economic, social and environmental resources. Natural resource management in Australia is shifting from considering the value of a single resource, such as the South Eastern Trawl Fishery, to considering complete ecosystems with their multiple uses, such as the South East Australian coastal and shelf waters. With such a shift in perspective, Australia is a w ....Development of a coupled physical-biological model of size-structured biota in marine waters. The marine environment contains highly valued economic, social and environmental resources. Natural resource management in Australia is shifting from considering the value of a single resource, such as the South Eastern Trawl Fishery, to considering complete ecosystems with their multiple uses, such as the South East Australian coastal and shelf waters. With such a shift in perspective, Australia is a world leader. A new suite of tools is required to understand ecosystem dynamics and to formulate management strategies. By providing well-defined manageable outputs from a complex natural system the coupled physical-biological model to be developed will provide such a tool.Read moreRead less
Coastal Processes Driven by the East Australia Current. Coastal waters of Northern NSW are dominated by the East Australia Current (EAC). Through its strength, variability in space and time, and its proximity to the coast, the EAC directly controls not only the longshore currents, but also the cross-shelf transport of nutrients, plankton and other biota. A knowledge of EAC dynamics and ocean productivity will be achieved in this project by comparison of results from high resolution ocean models ....Coastal Processes Driven by the East Australia Current. Coastal waters of Northern NSW are dominated by the East Australia Current (EAC). Through its strength, variability in space and time, and its proximity to the coast, the EAC directly controls not only the longshore currents, but also the cross-shelf transport of nutrients, plankton and other biota. A knowledge of EAC dynamics and ocean productivity will be achieved in this project by comparison of results from high resolution ocean models (having additional biological modules) with data from Research Vessel Franklin cruises in 1998 and 1999.Read moreRead less
Ocean-reef interactions as drivers of continental shelf productivity in a changing climate. Poor coastal management results in the irreparable destruction of reef systems' function and biodiversity, nationally and globally. To manage marine resources effectively we must implement sustainable practices, including forward planning in the context of climate change. A critical limitation in determining appropriate actions is a poor understanding of mechanisms driving productivity. Our project will p ....Ocean-reef interactions as drivers of continental shelf productivity in a changing climate. Poor coastal management results in the irreparable destruction of reef systems' function and biodiversity, nationally and globally. To manage marine resources effectively we must implement sustainable practices, including forward planning in the context of climate change. A critical limitation in determining appropriate actions is a poor understanding of mechanisms driving productivity. Our project will provide key information on the oceanographic mechanisms supporting Australia's coastal systems, linking nutrient supply, physical drivers and climate. By linking all these factors we will both assist in determining appropriate ecosystem management, and provide a knowledge base to support adaptation to future changes in Australia's climate.Read moreRead less
Hydrodynamics of Fringing Reef Systems. Ningaloo Marine Park is part of the National Representative System of Marine Protected Areas. Coral reefs are in a state of decline worldwide, yet Ningaloo Reef has remained in a relatively pristine state. However, its close proximity to land makes it particularly vulnerable to human activities, which are forecast to significantly grow in the near future. Results from this project will advance our ability to predict circulation on reefs and other similar c ....Hydrodynamics of Fringing Reef Systems. Ningaloo Marine Park is part of the National Representative System of Marine Protected Areas. Coral reefs are in a state of decline worldwide, yet Ningaloo Reef has remained in a relatively pristine state. However, its close proximity to land makes it particularly vulnerable to human activities, which are forecast to significantly grow in the near future. Results from this project will advance our ability to predict circulation on reefs and other similar coastal systems. This will provide insight into various ecological processes that are linked to hydrodynamics (e.g. recruitment), and will provide a foundation for conducting risk analysis of processes that threaten the integrity of nearshore environments (e.g. contaminant spills).Read moreRead less
Improved tools for comprehensive monitoring of water-clarity and light availability in coral reef ecosystems. The Great Barrier Reef is a World Heritage Area, home to over 1 million species and provides Australia with $6 billion in annual revenue. The capacity to monitor Australia’s natural resources and changes in condition are integral components of a sustainably and adaptively managed resource. By providing key synoptic tools to comprehensively monitor water quality and ecosystem status, the ....Improved tools for comprehensive monitoring of water-clarity and light availability in coral reef ecosystems. The Great Barrier Reef is a World Heritage Area, home to over 1 million species and provides Australia with $6 billion in annual revenue. The capacity to monitor Australia’s natural resources and changes in condition are integral components of a sustainably and adaptively managed resource. By providing key synoptic tools to comprehensively monitor water quality and ecosystem status, the project will contribute directly to an Environmentally Sustainable Australia and improve national capacity for responding to climate change and variability in coral reef environments. It will enable Australian remote sensing scientists to contribute knowledge and tools to the international community for application to coral reef and coastal waters globally. Read moreRead less
Coupled physical and biogeochemical dynamics on the Australian North West Shelf. Information regarding the natural function of the Australian North West Shelf is urgently required to sustainably manage the often conflicting uses of the region. This project will study the role of ocean processes in driving ocean productivity on the North West Shelf and determine the impact of projected climate variability.
Changes in the ocean's biological pump: innovative models and diagnostics. This Project aims to quantify how the ocean’s biological pump, which exports newly formed organic matter into the ocean interior, responds to environmental change. The biological pump is a key control on the global carbon and oxygen cycles, and hence on the viability of marine life. New, efficient numerical models will be developed and analysed with highly innovative mathematical methods. Expected outcomes are optimised .... Changes in the ocean's biological pump: innovative models and diagnostics. This Project aims to quantify how the ocean’s biological pump, which exports newly formed organic matter into the ocean interior, responds to environmental change. The biological pump is a key control on the global carbon and oxygen cycles, and hence on the viability of marine life. New, efficient numerical models will be developed and analysed with highly innovative mathematical methods. Expected outcomes are optimised predictive models and a new understanding of the possible future evolutions of the ocean carbon cycle, acidification, and oxygenation. This should provide significant benefits such as predictions of future ocean health, identification of processes that are sensitive to change, and strategies for marine resource management.Read moreRead less