Early warning of cyanobacteria blooms in drinking water reservoirs by means of evolutionary algorithms. Estimated economic cost of cyanobacteria blooms to Australia are at $150 million p.a. Early warning for cyanobacteria blooms will inform water managers to conduct preventive and operational control in reservoirs and water works, and significantly lower risks for public health and costs for monitoring and treatment. Resulting early warning systems will be novel prototypes for cyanobacteria bloo ....Early warning of cyanobacteria blooms in drinking water reservoirs by means of evolutionary algorithms. Estimated economic cost of cyanobacteria blooms to Australia are at $150 million p.a. Early warning for cyanobacteria blooms will inform water managers to conduct preventive and operational control in reservoirs and water works, and significantly lower risks for public health and costs for monitoring and treatment. Resulting early warning systems will be novel prototypes for cyanobacteria blooms in drinking water reservoirs based on forecasting models adaptable to environmental and climate change. Model-based scenario analysis will also assist in informed decisions on effects of drought, injection of recycled water and global warming to cyanobacteria growth.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
Complex system dynamics: restoring riparian and riverine ecosystems. Attempts to restore damaged ecosystems reveal inadequacies in theories describing ecosystem structure and function. For rivers, it is unclear whether theories relating to fluvial geomorphology and ecosystem dynamics are adequate to predict system trajectories following restoration. We will use empirical data on a degraded river to develop cross-scale models of system function, and predict ecosystem structure and dynamics follow ....Complex system dynamics: restoring riparian and riverine ecosystems. Attempts to restore damaged ecosystems reveal inadequacies in theories describing ecosystem structure and function. For rivers, it is unclear whether theories relating to fluvial geomorphology and ecosystem dynamics are adequate to predict system trajectories following restoration. We will use empirical data on a degraded river to develop cross-scale models of system function, and predict ecosystem structure and dynamics following restoration. Following revegetation of riparian habitats and replacement of large woody debris in in-stream habitats of the river, we will test theoretical predictions about changes to physical processes, biotic community assemblage rules and food webs to develop improved ecosystem-based restoration guidelines.Read moreRead less
Molecular biosignatures for isolating pollution problems in aquatic ecosystems using macroinvertebrate bioindicators. Aquatic ecosystems are under increasing threat by human activities. This has been further exacerbated by drought and climate change. In the future, understanding the major factors impairing aquatic ecosystems will be a vital part of sustaining water resources. This project develops new molecular tools to better monitor and assess aquatic pollution. We will develop a new high-tech ....Molecular biosignatures for isolating pollution problems in aquatic ecosystems using macroinvertebrate bioindicators. Aquatic ecosystems are under increasing threat by human activities. This has been further exacerbated by drought and climate change. In the future, understanding the major factors impairing aquatic ecosystems will be a vital part of sustaining water resources. This project develops new molecular tools to better monitor and assess aquatic pollution. We will develop a new high-tech deoxyribonucleic acid (DNA) approach to identify insect indicator species and combine this with a field-based microcosm method that uses local aquatic insects to isolate pollution effects from other impacts. This proposal will facilitate fast identification of pollution problems and provide the water industry with an innovative means to assess pollution and monitor remedial actions.Read moreRead less
Conservation genetics of the threatened Malleefowl. This project will provide national benefit at four levels. First, our comprehensive genetic analysis will provide our industry partners with vital information for sustainable management of the Malleefowl. The research findings will also enrich educational and ecotourism activities in rural Australia. The publication and popular dissemination of our findings will enhance Australia's international profile as a leader in conservation genetics r ....Conservation genetics of the threatened Malleefowl. This project will provide national benefit at four levels. First, our comprehensive genetic analysis will provide our industry partners with vital information for sustainable management of the Malleefowl. The research findings will also enrich educational and ecotourism activities in rural Australia. The publication and popular dissemination of our findings will enhance Australia's international profile as a leader in conservation genetics research. Finally, our research will promote undergraduate and postgraduate education by providing cutting-edge training and research opportunities for young scientists.Read moreRead less
A new approach to understanding community variation in marine soft-sediments. Sustainable management of Australia's rich coastal biodiversity requires an mechanistic understanding of soft-sediment systems, as these dominate the benthic environment of our Exclusive Economic Zone. This project will substantially enhance our fundamental knowledge of soft-sediment systems by determining major processes responsible for variation in benthic community structure. This research will improve sustainable ....A new approach to understanding community variation in marine soft-sediments. Sustainable management of Australia's rich coastal biodiversity requires an mechanistic understanding of soft-sediment systems, as these dominate the benthic environment of our Exclusive Economic Zone. This project will substantially enhance our fundamental knowledge of soft-sediment systems by determining major processes responsible for variation in benthic community structure. This research will improve sustainable management of estuaries by (i) increasing the cost-effectiveness of detecting environmental change, (ii) determining any negative effects of changing detrital resources, and (iii) documenting soft-sediment species currently present in Botany Bay, which will aid in the early detection of invasive pests.Read moreRead less
Integrating seagrass recruitment and growth at the shoot scale with temporal and spatial dynamics of seagrass meadows in marine landscapes. In Australia, seagrass loss associated with human activity is one of the most serious issues affecting the marine environment. Despite this, processes contributing to maintenance of seagrass meadows are poorly understood. This project addresses meadow maintenance through measuring seedling recruitment, clonal growth and patch dynamics for 3 species of seagra ....Integrating seagrass recruitment and growth at the shoot scale with temporal and spatial dynamics of seagrass meadows in marine landscapes. In Australia, seagrass loss associated with human activity is one of the most serious issues affecting the marine environment. Despite this, processes contributing to maintenance of seagrass meadows are poorly understood. This project addresses meadow maintenance through measuring seedling recruitment, clonal growth and patch dynamics for 3 species of seagrasses, and modeling emergent patterns of meadow expansion. The outcomes will be integration of shoot-scale and meadow-scale dynamics in shallow subtidal landscapes, resulting in a clearer understanding of and ability to manage large-scale changes in seagrass meadows caused by natural and anthropogenic influences.
Read moreRead less
Characteristic length scales of marine systems: Can they be measured and what do they mean? A crucial question in ecology is the ?characteristic? scale or scales at which a system should be observed to most clearly observe its deterministic dynamics. We propose to modify methods recently developed for model ecosystems so they may be applied to real ecosystems, assess the performance of these measures in identifying unambiguous length scales, and ascertain what these scales reveal about the under ....Characteristic length scales of marine systems: Can they be measured and what do they mean? A crucial question in ecology is the ?characteristic? scale or scales at which a system should be observed to most clearly observe its deterministic dynamics. We propose to modify methods recently developed for model ecosystems so they may be applied to real ecosystems, assess the performance of these measures in identifying unambiguous length scales, and ascertain what these scales reveal about the underlying ecology. The work will provide significant advances to important applied scaling questions such as the optimal size of reserves and ecosystem management ?units?, and the appropriate scale of observation to detect deterministic trends in ecosystem dynamics.
Read moreRead less
Critical flux paths influencing ecological processes in an urban estuary. This study will focus on the roles of benthic algae, denitrification and consumers on nutrient fluxes and planktonic production in the Swan River estuary, Western Australia. A 5-year research program of measurements and numerical modelling has identified these processes as poorly quantified, critical to the estuary trophic status, and essential data in order to accurately predict potential impacts of remediation strategie ....Critical flux paths influencing ecological processes in an urban estuary. This study will focus on the roles of benthic algae, denitrification and consumers on nutrient fluxes and planktonic production in the Swan River estuary, Western Australia. A 5-year research program of measurements and numerical modelling has identified these processes as poorly quantified, critical to the estuary trophic status, and essential data in order to accurately predict potential impacts of remediation strategies. We will validate the impacts of denitrification through in situ measurements, review data on higher order consumers, and use this information in a numerical model to understand the interactions of biogeochemical fluxes, plant, animal and microbial communities, and transport processes in the estuary.Read moreRead less
Understanding the ecological resilience of nearshore marine communities. Our thinking about climate change and its effects on marine ecosystems is shifting from considering how we can prevent it occurring to understanding how natural systems might adapt to climate change, or how we might improve the ability of these ecosystems to recover, that is, their resilience to change. In many shallow water ecosystems, one or a few key species provide habitat structure that in turn determines the abundanc ....Understanding the ecological resilience of nearshore marine communities. Our thinking about climate change and its effects on marine ecosystems is shifting from considering how we can prevent it occurring to understanding how natural systems might adapt to climate change, or how we might improve the ability of these ecosystems to recover, that is, their resilience to change. In many shallow water ecosystems, one or a few key species provide habitat structure that in turn determines the abundance of a wide range of other species. This proposal will take two important temperate marine 'engineers' and identify the factors that make them most resilient.Read moreRead less