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
Climate, Vegetation and Fire in the Australian Paleomonsoon: An investigation using paleodata synthesis, contemporary observations and model experiments. This investigation of the history and development of the Australian monsoon will provide much needed information for the prediction of future climatic changes in the Australasian region and beyond. Furthermore, our work will elucidate the impact of current north Australian fire regimes on the strength of the Australian monsoon that is so critic ....Climate, Vegetation and Fire in the Australian Paleomonsoon: An investigation using paleodata synthesis, contemporary observations and model experiments. This investigation of the history and development of the Australian monsoon will provide much needed information for the prediction of future climatic changes in the Australasian region and beyond. Furthermore, our work will elucidate the impact of current north Australian fire regimes on the strength of the Australian monsoon that is so critical to the environment and economy of the north Australian region, a region that produces wealth for Australia out of proportion to its population. The work has important policy implications for water and fire management in Northern Australia and is significant to aboriginals, pastoralists and other community groups.Read moreRead less
A cross-national study of the relative impact of an oral component on PhD examination quality, language and practice. High quality doctoral degrees call for the most effective forms of assessment. This project investigates the role of oral examination in PhD assessment, common internationally but not in Australia, and is the first to compare the relative impact of oral and 'no oral' models on examination quality, language and practice.
Understanding how bacteria form multicellular biofilm communities on surfaces: the role of cyclic diguanylate as a potent biofilm activator. Bacteria usually exist as multicellular communities called biofilms when attached to surfaces, frequently to the detriment of the environment, industry and health. This project will explore the strategies bacteria use to switch from living as free-floating, individual cells to forming biofilms by studying how bacteria 'switch on' their biofilm genes.
MICROSCALE PLANKTON AND PARTICLE DYNAMICS: COMPARING AND CONTRASTING AUSTRALIAN AND INTERNATIONAL SEAS. Microscopic phytoplankton are the basis of ocean ecosystems, but most predictions and measurements focus on processes that occur over kilometres. Our recent work shows that definite and regular submetre seascape topography exists. This grant will test the extent to which this seascape topography is the fundamental organisational unit of marine ecosystems and the extent to which it characteris ....MICROSCALE PLANKTON AND PARTICLE DYNAMICS: COMPARING AND CONTRASTING AUSTRALIAN AND INTERNATIONAL SEAS. Microscopic phytoplankton are the basis of ocean ecosystems, but most predictions and measurements focus on processes that occur over kilometres. Our recent work shows that definite and regular submetre seascape topography exists. This grant will test the extent to which this seascape topography is the fundamental organisational unit of marine ecosystems and the extent to which it characterises Australian coastal waters and open ocean water masses. This research takes a leadership role in defining and advancing our understanding of how marine ecosystems function. The project will bring over $200 million of Japanese infrastructure to Australia for 3 years.Read moreRead less
Characterising the tropical "heat engine" of global climate: combined coral, stalagmite and tree-ring records from the Indo-Pacific region. The recent anthropogenic global warming is causing polar icecap melting, sea level rise, reef coral bleaching and degradation, and increased frequency and intensity of severe droughts, floods, tropical cyclones/hurricanes/typhoons in the past decades, focusing daily media headlines worldwide. Our study will enhance understanding of global climate change, El ....Characterising the tropical "heat engine" of global climate: combined coral, stalagmite and tree-ring records from the Indo-Pacific region. The recent anthropogenic global warming is causing polar icecap melting, sea level rise, reef coral bleaching and degradation, and increased frequency and intensity of severe droughts, floods, tropical cyclones/hurricanes/typhoons in the past decades, focusing daily media headlines worldwide. Our study will enhance understanding of global climate change, El Niño and Asian-Australian monsoon variability and coral reef degradation, and provide improved knowledge for future predictions. The outcome will impact on our National Research Priority 1: An Environmentally Sustainable Australia, enhance Australia's leadership in coral reef research, and contribute to an improved relationship with our neighbours in science, education and training.Read moreRead less
The importance of edge effects in determining the value of seagrass landscapes as fish nurseries. Seagrasses are a conspicuous element of Australian marine environments, and are crucial in the conservation and maintenance of biodiversity. Degradation of seagrass ecosystems from climatic extremes, increased sediment and nutrients in the water, and other pollutants results in loss and fragmentation of meadows. These changes to seagrass are linked with increased coastal erosion, severe loss of bio ....The importance of edge effects in determining the value of seagrass landscapes as fish nurseries. Seagrasses are a conspicuous element of Australian marine environments, and are crucial in the conservation and maintenance of biodiversity. Degradation of seagrass ecosystems from climatic extremes, increased sediment and nutrients in the water, and other pollutants results in loss and fragmentation of meadows. These changes to seagrass are linked with increased coastal erosion, severe loss of biodiversity, and collapse of fisheries. Increased understanding of how biological processes such as predation and food availability influence animal associations with seagrasses, and how these effects change with landscape structure, will have important applications in the sustainable management of Australia's threatened coastal habitats.Read moreRead less
Assessing absolute sustainability of global cities. The project aims to create a quantitative modelling framework for assessing the absolute sustainability of cities by combining global multi-region input-output analysis with the 'safe and just space' concept for human development. The model will allow assessment of the full supply chain environmental and social impacts of urban economic activities against biophysical planetary limits as well as social foundation thresholds defined in the litera ....Assessing absolute sustainability of global cities. The project aims to create a quantitative modelling framework for assessing the absolute sustainability of cities by combining global multi-region input-output analysis with the 'safe and just space' concept for human development. The model will allow assessment of the full supply chain environmental and social impacts of urban economic activities against biophysical planetary limits as well as social foundation thresholds defined in the literature. The project will advance sustainability science methodology and will greatly benefit worldwide initiatives for urban sustainability. Case studies on Australian cities will assess where interventions can be most practically, realistically and effectively implemented.Read moreRead less
Fingerprints of global climate change and forest management on rhizosphere carbon and nutrient cycling. Using a series of innovative techniques, this project seeks to capture the excellent, exciting opportunities for studying impacts of global climate change (GCC) and forest management on plant-soil-microbe interactions in rhizosphere carbon and nutrient cycling, with two of the world's best GCC forest experiments in Sweden and USA and three long-term forest management experiments in Australia. ....Fingerprints of global climate change and forest management on rhizosphere carbon and nutrient cycling. Using a series of innovative techniques, this project seeks to capture the excellent, exciting opportunities for studying impacts of global climate change (GCC) and forest management on plant-soil-microbe interactions in rhizosphere carbon and nutrient cycling, with two of the world's best GCC forest experiments in Sweden and USA and three long-term forest management experiments in Australia. The successful conduct of this multidisciplinary collaborative research will result in: improved understanding and management of forest ecosystems in response to GCC and effective biodiversity conservation in managed forests; and enhanced international reputation and expertise of the Australian scientists in the relevant research fields.Read moreRead less
Sustainable Australian food production within secure global supply chains. This project aims at exploring future pathways for the Australian food system to remain secure under future disruptive changes, environmentally and socially sustainable, and able to offer healthy food choices. It will reveal the connections among food supply chains, diets and human health, and portray a food system that achieves public health and sustainability goals while positioning Australia securely into the global su ....Sustainable Australian food production within secure global supply chains. This project aims at exploring future pathways for the Australian food system to remain secure under future disruptive changes, environmentally and socially sustainable, and able to offer healthy food choices. It will reveal the connections among food supply chains, diets and human health, and portray a food system that achieves public health and sustainability goals while positioning Australia securely into the global supply chain network. These goals will be achieved by creating the Australian Food Lab, which will provide a collaborative research platform for environmental scientists, economists, public health experts, and food industry representatives for investigating issues pertaining to the future of our food system.Read moreRead less