Maximising the essential oil yield of blue mallee plantations. Felton, Grimwade and Bickford Pty Ltd will collaborate with us to develop plant material and methods for establishing profitable plantations of blue mallee (Eucalyptus polybractea) for eucalyptus oil production. This is important because, as a result of recent legislation, the forest patches currently used in oil production will soon be unavailable to the company. We will also investigate the physiological and biochemical mechanism ....Maximising the essential oil yield of blue mallee plantations. Felton, Grimwade and Bickford Pty Ltd will collaborate with us to develop plant material and methods for establishing profitable plantations of blue mallee (Eucalyptus polybractea) for eucalyptus oil production. This is important because, as a result of recent legislation, the forest patches currently used in oil production will soon be unavailable to the company. We will also investigate the physiological and biochemical mechanisms underlying oil quality and quantity in blue mallee. This knowledge will assist the industry in the longer term by allowing them to improve and modify their products in response to changes in market demands.Read moreRead less
Enhancing natural enemy mortality of chrysomelids in young eucalypt plantations through habitat manipulation. Eucalyptus plantations are the future of Australian forestry. In eucalypt plantations leaf-feeding beetles reduce tree growth by an average of 53%, substantially reducing profits. Sustainable management of these pests is best done by maximising the impact of native beneficial agents, eg wasps and spiders. This research will quantify the beneficial insects in plantations and increase ....Enhancing natural enemy mortality of chrysomelids in young eucalypt plantations through habitat manipulation. Eucalyptus plantations are the future of Australian forestry. In eucalypt plantations leaf-feeding beetles reduce tree growth by an average of 53%, substantially reducing profits. Sustainable management of these pests is best done by maximising the impact of native beneficial agents, eg wasps and spiders. This research will quantify the beneficial insects in plantations and increase their efficacy by manipulating the plantation environment so it provides more of the resources (food & shelter) these beneficials require. This approach is significant as it has not been previously attempted in forestry. Our management recommendations will make the plantation sector more profitable and sustainable.Read moreRead less
Accelerated breeding for a changing environment: genomic and physiological profiling of newly generated polyploid trees. Global climate change threatens the health and productivity of forests and plantations. Because tree breeding is slow, elite trees cannot be adapted rapidly to new environments. A new procedure for accelerated tree breeding has been developed by the industry partner. The procedure, termed polyploidisation, increases DNA content and produces novel traits that can improve plant ....Accelerated breeding for a changing environment: genomic and physiological profiling of newly generated polyploid trees. Global climate change threatens the health and productivity of forests and plantations. Because tree breeding is slow, elite trees cannot be adapted rapidly to new environments. A new procedure for accelerated tree breeding has been developed by the industry partner. The procedure, termed polyploidisation, increases DNA content and produces novel traits that can improve plant growth and resilience. Polyploidisation is a natural force in plant evolution and its routine application for tree breeding has much potential. Using diverse approaches, we will investigate how newly synthesised polyploid tree species perform under heat and drought stress.Read moreRead less
Enhancing the essential oil yield of clonal blue mallee plantations. Production of high quality eucalyptus oil in Victoria involves sustainable harvesting of foliage from public land. A recent review of land use by the Victorian Government has required that, over the next few years, oil producers move their harvesting operations into plantations on private land. This project will assist producers by developing methods for establishing plantations of eucalypts (blue mallee) with very high and e ....Enhancing the essential oil yield of clonal blue mallee plantations. Production of high quality eucalyptus oil in Victoria involves sustainable harvesting of foliage from public land. A recent review of land use by the Victorian Government has required that, over the next few years, oil producers move their harvesting operations into plantations on private land. This project will assist producers by developing methods for establishing plantations of eucalypts (blue mallee) with very high and economically viable yields of eucalyptus oil. This research will help restore Victoria's position as one of the major producers of high quality eucalyptus oil. Read moreRead less
Quantifying tree and soil respiration and their responses to global change. The Australian Greenhouse Office, as well as independent analysis, recognizes that belowground processes must be better quantified if Australia's contributions to atmospheric concentrations of greenhouse gases (GG) are to be firmly based. A major issue is the lack of dedicated research focused on soil and plant root emissions of GG and, in particular, a lack of testing of methodologies suited to Australian soils and con ....Quantifying tree and soil respiration and their responses to global change. The Australian Greenhouse Office, as well as independent analysis, recognizes that belowground processes must be better quantified if Australia's contributions to atmospheric concentrations of greenhouse gases (GG) are to be firmly based. A major issue is the lack of dedicated research focused on soil and plant root emissions of GG and, in particular, a lack of testing of methodologies suited to Australian soils and conditions. This project will address these concerns. We will also be addressing the clear need for further training of PhD qualified researchers in the field of climate change. Read moreRead less
A new hypothesis for the development of hollows in Box-Ironbark forest. Timber harvesting in Box-Ironbark forest over the past 150 years has significantly affected the habitat of hollow dependent fauna. Current management aims at speeding the growth of trees to accelerate hollow formation. Recent studies suggest that hollows form in trees of the Box-Ironbark forest following basal stem damage by fire or windstorm, rather than from branch damage as previously assumed. This hypothesis will be t ....A new hypothesis for the development of hollows in Box-Ironbark forest. Timber harvesting in Box-Ironbark forest over the past 150 years has significantly affected the habitat of hollow dependent fauna. Current management aims at speeding the growth of trees to accelerate hollow formation. Recent studies suggest that hollows form in trees of the Box-Ironbark forest following basal stem damage by fire or windstorm, rather than from branch damage as previously assumed. This hypothesis will be tested in relation to wildfires in 1985, 1991 and 1993 and by experimental simulation of these events. The results of this research are likely to have major implications for the management of Box- Ironbark forests.Read moreRead less
Pest Status and Management of a Creiss psyllid in Eucalyptus plantations. Research studies are required on the ecology and epidemiology of a Creiis psyllid, recently found causing significant damage in young Eucalyptus dunnii plantations. The susceptibility to psyllid damage to a range of selected clonal types will be examined. With increasing community concerns associated with insecticide usage and to reduce costs, exploitation of natural resistance is an avenue that counters economic threat f ....Pest Status and Management of a Creiss psyllid in Eucalyptus plantations. Research studies are required on the ecology and epidemiology of a Creiis psyllid, recently found causing significant damage in young Eucalyptus dunnii plantations. The susceptibility to psyllid damage to a range of selected clonal types will be examined. With increasing community concerns associated with insecticide usage and to reduce costs, exploitation of natural resistance is an avenue that counters economic threat from herbivorous insects. Since Australia is currently planting 100,000 ha of eucalypts per year results from this project are essential to build better management strategies for reduce the impact of this and all pests on tree survival and growth.Read moreRead less
The Sustainable Effluent Irrigation Project - Effects of effluent irrigation on soil sodicity and groundwater quality. The land application of recycled municipal effluent is now regularly practised by a number of local authorities and agencies responsible for centralised collection of wastewater, its treatment and disposal. Treated municipal effluent is often land applied and used to grow hardwood plantations. Hardwood plantations are very effective in producing large amounts of biomass and also ....The Sustainable Effluent Irrigation Project - Effects of effluent irrigation on soil sodicity and groundwater quality. The land application of recycled municipal effluent is now regularly practised by a number of local authorities and agencies responsible for centralised collection of wastewater, its treatment and disposal. Treated municipal effluent is often land applied and used to grow hardwood plantations. Hardwood plantations are very effective in producing large amounts of biomass and also assist agencies in off-setting wastewater treatment and disposal costs associated with advanced wastewater treatment to remove nutrients. This project will examine the effects of effluent irrigation on soil chemistry and groundwater quality at two hardwood plantations in the Hunter Valley, NSW. It is increasingly clear that large-scale reuse schemes, particularly those involving hardwood plantations, must be designed to be sustainable and have no significant impact on soil chemistry (increasing sodicity) and groundwater. This project will develop irrigation regimes for hardwood plantations which will promote soil productivity and optimize effluent application rates for pollutant removal and biomass production.
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Social acceptability of forest management options: Landscape level visualisation and evaluation. Sustainable forest policy requires social acceptance. Prior research has investigated relative acceptability of options at a forest stand level. However, we have insufficient understanding of public acceptance of forest management systems implemented across the wider landscape. Only detailed knowledge of public reaction to social, environmental and economic impacts and the trade-offs involved can red ....Social acceptability of forest management options: Landscape level visualisation and evaluation. Sustainable forest policy requires social acceptance. Prior research has investigated relative acceptability of options at a forest stand level. However, we have insufficient understanding of public acceptance of forest management systems implemented across the wider landscape. Only detailed knowledge of public reaction to social, environmental and economic impacts and the trade-offs involved can reduce the divisive nature of the forest management debate. This project will use interactive, still and animated computer representations of landscapes to examine social acceptability of alternatives to clearfell harvesting. This knowledge will be integrated with biophysical data to improve management of forested landscapes.Read moreRead less
Links between carbon and nitrogen cycling processes in forest soils: An innovative approach with both NMR and stable isotope techniques. Understanding the critical links between soil carbon and nitrogen cycling processes in forest ecosystems is necessary for developing effective site management to enhance forest productivity and environmental benefits. In the first application of 14N-nuclear magnetic resonance (NMR) to soil humic acid (HA), we have discovered that surprisingly nitrate-N is prese ....Links between carbon and nitrogen cycling processes in forest soils: An innovative approach with both NMR and stable isotope techniques. Understanding the critical links between soil carbon and nitrogen cycling processes in forest ecosystems is necessary for developing effective site management to enhance forest productivity and environmental benefits. In the first application of 14N-nuclear magnetic resonance (NMR) to soil humic acid (HA), we have discovered that surprisingly nitrate-N is present in soil HAs, with the HA-nitrate N extremely sensitive to forest management practices. This project represents the first attempt to integrate the use of advanced NMR and stable isotope techniques to examine both chemical and biological linkages between carbon and nitrogen cycling processes in Australian and US forest ecosystems.Read moreRead less