Understanding and manipulating stress physiology of eucalypt seedlings to improve survival and growth. Eucalyptus globulus and E. nitens are the major species being established to meet the 2020 Vision (Anon 1999) of trebling Australia's plantation estate. Seedling mortality and/or reduced growth after planting, linked to the transition from ideal growing conditions in the nursery to stressful conditions (high drought and browsing risk) at the planting sites, significantly increase the costs of ....Understanding and manipulating stress physiology of eucalypt seedlings to improve survival and growth. Eucalyptus globulus and E. nitens are the major species being established to meet the 2020 Vision (Anon 1999) of trebling Australia's plantation estate. Seedling mortality and/or reduced growth after planting, linked to the transition from ideal growing conditions in the nursery to stressful conditions (high drought and browsing risk) at the planting sites, significantly increase the costs of plantation production. By investigating physiological mechanisms of seedlings and their responses to drought and browsing stress during establishment in the field, methods for the production of seedlings acclimated to drought or browsing stress will be developed. The research outcomes will help maximise the financial return on over $28 M per annum being invested by the 8 project partners in seedling production and planting over 80, 000 ha per year for the next 19 years to meet the requirements of Vision 2020.Read moreRead less
Linking environmental stress in pine plantations to bark stripping by browsers and fungal attack: developing novel options for management. The Australian forest industry, under the pressure of certification requirements, is moving towards a more integrated, reduced chemical, environmentally sustainable approach to protecting forest. Novel insights into the stress biology of pine will provide valuable information that will underpin efforts to reduce risk e.g. the matching of specific genotypes to ....Linking environmental stress in pine plantations to bark stripping by browsers and fungal attack: developing novel options for management. The Australian forest industry, under the pressure of certification requirements, is moving towards a more integrated, reduced chemical, environmentally sustainable approach to protecting forest. Novel insights into the stress biology of pine will provide valuable information that will underpin efforts to reduce risk e.g. the matching of specific genotypes to site so that pest resistance can be maintained even under environmental stress conditions. By understanding the 'attraction' factor of stressed pine to wallabies we will develop and test an urgently and nationally required diversionary feed for this browser. Lethal control involving poison is becoming increasingly restricted.Read moreRead less
Environmental and genetic control over blackwood (Acacia melanoxylon) timber colour, density, and recovery. The project will investigate the roles of environment and genetics in the expression of wood characteristics in blackwood. It will determine the potential heritability of valuable blackwood wood traits and provide a sound understanding of the basis of colour expression. Heartwood characteristics, particularly colour, density, ring width and knottiness determine the commercial value of blac ....Environmental and genetic control over blackwood (Acacia melanoxylon) timber colour, density, and recovery. The project will investigate the roles of environment and genetics in the expression of wood characteristics in blackwood. It will determine the potential heritability of valuable blackwood wood traits and provide a sound understanding of the basis of colour expression. Heartwood characteristics, particularly colour, density, ring width and knottiness determine the commercial value of blackwood. The limited research on these characteristics, all undertaken outside Australia, points to combined genetic and environmental control. By understanding the relative importance that environmental conditions and genetic material have in producing desirable wood traits, growers will be better able to realise the full commercial value of blackwood.Read moreRead less
Assessing the risk of genetic pollution from Eucalyptus globulus and Corymbia plantations. We will provide the biological information necessary to assess the risk of genetic pollution of native eucalypt forest from plantations of Eucalyptus globulus and Corymbia torelliana. Key biological factors that can act as barriers to hybridisation including flowering time, pollen and seed dispersal distances, crossability, hybrid fitness and the potential for backcrossing will be identified and used to de ....Assessing the risk of genetic pollution from Eucalyptus globulus and Corymbia plantations. We will provide the biological information necessary to assess the risk of genetic pollution of native eucalypt forest from plantations of Eucalyptus globulus and Corymbia torelliana. Key biological factors that can act as barriers to hybridisation including flowering time, pollen and seed dispersal distances, crossability, hybrid fitness and the potential for backcrossing will be identified and used to develop strategies to reduce the risk of genetic pollution. The molecular differentiation between populations of the E. globulus complex, including plantations, will be studied to provide a genetic framework for the management of the genepool of this most important hardwood plantation species.Read moreRead less
Managing for persistence of the saproxylic biota in production forest landscapes. The pattern of 'fragmentation' and 'matrix alteration' being examined in this study mirrors not just other areas of Tasmania but also much of south-eastern Australia. The research addresses a conservation biology issue in a new and novel way and has been developed with, and is supported by an industry partner working in multiple-use forest management, so the research provides both immediate applied and strategic o ....Managing for persistence of the saproxylic biota in production forest landscapes. The pattern of 'fragmentation' and 'matrix alteration' being examined in this study mirrors not just other areas of Tasmania but also much of south-eastern Australia. The research addresses a conservation biology issue in a new and novel way and has been developed with, and is supported by an industry partner working in multiple-use forest management, so the research provides both immediate applied and strategic outcomes. These outcomes directly relate to forest sustainability especially the management of the biodiverse dead wood habitat including the harvesting of fuelwood.Read moreRead less
Risk, impact on productivity and control of Mycosphaerella infections in plantations in plantations of E. nitens and E. globulus. Mycosphaerella, a defoliating fungal pathogen of eucalypts, has the potential to change markedly the economics of plantation development. This research will explore the fundamental physiological and pathological processes associated with the disease, link these findings into established process-based models of forest plantation growth for predictive purposes and util ....Risk, impact on productivity and control of Mycosphaerella infections in plantations in plantations of E. nitens and E. globulus. Mycosphaerella, a defoliating fungal pathogen of eucalypts, has the potential to change markedly the economics of plantation development. This research will explore the fundamental physiological and pathological processes associated with the disease, link these findings into established process-based models of forest plantation growth for predictive purposes and utilise hyperspectral remote sensing techniques to scale impact from the tree to plantation level. In doing this research not only are questions of key importance to an important and growing industry sector addressed, but an innovative approach to disease impact assessment established and a skills base and methodology widely applicable to other tree and agricultural disease problems established.Read moreRead less
Cellular automata model of forest stands to predict size-class distribution and survival. Existing forest growth models predict well stand level processes such as growth. However, they provide little information on forest structure and how this affects commercial forest products, risks of growing plantations and stand dynamics that determine carbon sequestration and water-use and result in age-related decline in productivity and self-thinning. By using newly developed technology to quantify in ....Cellular automata model of forest stands to predict size-class distribution and survival. Existing forest growth models predict well stand level processes such as growth. However, they provide little information on forest structure and how this affects commercial forest products, risks of growing plantations and stand dynamics that determine carbon sequestration and water-use and result in age-related decline in productivity and self-thinning. By using newly developed technology to quantify inter-tree competition, tree level resource supply, between tree genetic differences and the importance of chance events this project will draw on complexity theory to develop an innovative model that partitions stand level production to forecast the growth and size of individual trees.Read moreRead less
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
Acceptability of Forest Harvesting Systems. Fierce public debate over forest management has prompted forest agencies to develop and test alternative harvesting systems. This project will examine community response to these harvesting and regeneration options. It will avoid the biases of existing research by developing an interactive simulation of the forest environment that will allow participants to view visual, ecological and economic outcomes of harvest options, as well as changes over time ....Acceptability of Forest Harvesting Systems. Fierce public debate over forest management has prompted forest agencies to develop and test alternative harvesting systems. This project will examine community response to these harvesting and regeneration options. It will avoid the biases of existing research by developing an interactive simulation of the forest environment that will allow participants to view visual, ecological and economic outcomes of harvest options, as well as changes over time as forest regenerates. Public judgements of the acceptability of harvesting options will be integrated with the outcomes of related biophysical studies to identify socially and ecologically sustainable management options for Australian native forests.Read moreRead less