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Bad tastes, odours and toxins in our drinking water reservoirs: are benthic cyanobacteria the culprits? Cyanobacteria (blue-green algae) produce toxins and bad tastes that contaminate drinking water sources, cause public concern about water quality. This project will address a critical knowledge gap by investigating species that grow on the sediments of reservoirs, thus providing more comprehensive management solutions to the water industry.
Next-generation models to predict cyanobacteria harmful algal blooms. This project aims to address the need for improved predictions of cyanobacteria (blue-green algae) harmful algal blooms. Accurate predictions of blooms with computer models are important to support management strategies to prevent their occurrence. This project is expected to generate new knowledge of strain-level variation in cyanobacteria that leads to toxic blooms. This project will lead to new knowledge of the significance ....Next-generation models to predict cyanobacteria harmful algal blooms. This project aims to address the need for improved predictions of cyanobacteria (blue-green algae) harmful algal blooms. Accurate predictions of blooms with computer models are important to support management strategies to prevent their occurrence. This project is expected to generate new knowledge of strain-level variation in cyanobacteria that leads to toxic blooms. This project will lead to new knowledge of the significance of strain-level variation in cyanobacteria harmful algal blooms, how strains influence toxin production and models for prediction of bloom and toxins. The project will generate significant benefits for water security for the purposes human consumption and recreation, and ecosystem health.Read moreRead less
Australia's freshwater ecosystems: how microbial diversity and functionality influence harmful cyanobacterial blooms. Toxic cyanobacterial blooms are a constant threat to safe drinking water supplies. A bloom is a poorly understood interaction between many species and the environment. This project will investigate the entire microbial population and their physiologies present in a bloom event in order to identify potential targets for their management.
Are nutrients the key driver in stimulating toxic algae in subtropical water reservoirs? This project aims to determine the key factors causing blooms of the toxic algae, Cylindrospermopsis raciborskii, which dominates many freshwater reservoirs throughout Queensland. Little is known of why blooms of this species occur. Without the development of this understanding and research capacity to tackle this issue in Queensland, the severity of the problem is likely to increase, putting ever-greater ....Are nutrients the key driver in stimulating toxic algae in subtropical water reservoirs? This project aims to determine the key factors causing blooms of the toxic algae, Cylindrospermopsis raciborskii, which dominates many freshwater reservoirs throughout Queensland. Little is known of why blooms of this species occur. Without the development of this understanding and research capacity to tackle this issue in Queensland, the severity of the problem is likely to increase, putting ever-greater pressure on drinking water supplies. The outcomes from this project would therefore be an increased capacity to predict blooms, and identification of management options for reducing the occurrence of blooms to ensure a cost-effective and safe water supply.Read moreRead less
Maximizing reservoir water quality security through the use of a Lake Diagnostic System (LDS) and a Controlled Lagrangian Drogue (CLD). It is proposed to build on recent advancements in limnological research and existing measurement technologies to develop the hardware, algorithms and software to form a unique real time reservoir water quality management system, driven by minimal measurement inputs. This will remove the reliance on extensive expensive reservoir monitoring, previously necessary ....Maximizing reservoir water quality security through the use of a Lake Diagnostic System (LDS) and a Controlled Lagrangian Drogue (CLD). It is proposed to build on recent advancements in limnological research and existing measurement technologies to develop the hardware, algorithms and software to form a unique real time reservoir water quality management system, driven by minimal measurement inputs. This will remove the reliance on extensive expensive reservoir monitoring, previously necessary to characterize the lake spatial variability and seasonality, for full 3D modelling. This project will deliver to industry: two measurement tools to simplify reservoir monitoring, the LDS and CLD; and software tools to manage real time data collection, provide decision support to reservoir managers and to enable ?on-demand? scenario predictions.Read moreRead less
Catchment-scale and riparian zone stormwater retention: can it restore stream hydrology? This project will test whether or not stormwater retention systems dispersed throughout a catchment can restore pre-development streamflows in peri-urban streams. It will provide a new model for the design of stormwater drainage systems which both protect aquatic ecosystems and reduce the demand for imported water in cities.
Environmental drivers for production of the toxin, cylindrospermopsin, by the cyanobacterium Cylindrospermopsis raciborskii. Water authorities spend significant resources to monitor and control algal blooms. A significant part of this is monitoring freshwater toxic algal blooms that can impact on drinking water and recreational uses. One of the difficulties in monitoring blooms is that the toxin content of individual species can vary considerably. It is unclear whether this is caused by changes ....Environmental drivers for production of the toxin, cylindrospermopsin, by the cyanobacterium Cylindrospermopsis raciborskii. Water authorities spend significant resources to monitor and control algal blooms. A significant part of this is monitoring freshwater toxic algal blooms that can impact on drinking water and recreational uses. One of the difficulties in monitoring blooms is that the toxin content of individual species can vary considerably. It is unclear whether this is caused by changes in environmental conditions, i.e. nutrient, light, temperature. This project would provide the link between environmental conditions and toxin production to improve the ability to predict and monitor toxin production.Read moreRead less
Restoring functional links between riparian zones and streams by enhancing structural retention. This project aims to test whether structural retention, whereby plant detritus (logs, bark, leaves) is trapped and retained within river channels, can offset the impacts caused by widespread clearance of vegetation along river banks, a widespread problem in Australia and the world. Theoretically, retention is a major environmental driver of ecosystem change in rivers, but this has rarely been tested, ....Restoring functional links between riparian zones and streams by enhancing structural retention. This project aims to test whether structural retention, whereby plant detritus (logs, bark, leaves) is trapped and retained within river channels, can offset the impacts caused by widespread clearance of vegetation along river banks, a widespread problem in Australia and the world. Theoretically, retention is a major environmental driver of ecosystem change in rivers, but this has rarely been tested, particularly in a restoration context. The aim of this project is to show that increasing retention results in higher species diversity, thus providing managers with a relatively straightforward method for improving the environmental conditions of rivers, while simultaneously testing three hypotheses about rectifying ecosystem degradation caused by human impacts.Read moreRead less
Resilience of lake ecosystems to water-level manipulation. Which lakes recover from fluctuations in water level and which do not? Manipulations of water levels in lakes will need to intensify as droughts become more frequent. This project will develop robust ways of forecasting how lakes will respond to changes in manipulations of water levels, to minimise extinctions and maintain aesthetics and water quality.
Sources of phosphorus promoting cyanobacteria in subtropical reservoirs. Water managers around Australia are currently considering various strategies to deal with water shortages. Many of these management actions have potential to impact water quality, through altering the nutrient balance within reservoirs and hence affecting nutrients available for cyanobacteria. Cyanobacteria blooms pose an increasing threat to water supplies, with economic, social and environmental costs of $150M pa in Aus ....Sources of phosphorus promoting cyanobacteria in subtropical reservoirs. Water managers around Australia are currently considering various strategies to deal with water shortages. Many of these management actions have potential to impact water quality, through altering the nutrient balance within reservoirs and hence affecting nutrients available for cyanobacteria. Cyanobacteria blooms pose an increasing threat to water supplies, with economic, social and environmental costs of $150M pa in Australia. The project will provide tools to water quality managers to assess how changes to subtropical reservoirs, such as water recycling, catchment land-use changes and increased drawdown are likely to affect nutrient budgets and cyanobacteria blooms.Read moreRead less