Mixed species plantations: does diversity help tropical eucalypts grow faster, better, longer? To test the assumption that mixtures are better than monocultures, using data from experiments (QFRI) and community plantings. Growth rate, habit (form, branching), timber and soil characteristics in Eucalyptus pellita (Red Mahogany) plantings should elucidate whether mixtures:
1. grow (above-ground woody biomass) faster than pure plantings;
2. have straighter trees with smaller branches;
3. improve ....Mixed species plantations: does diversity help tropical eucalypts grow faster, better, longer? To test the assumption that mixtures are better than monocultures, using data from experiments (QFRI) and community plantings. Growth rate, habit (form, branching), timber and soil characteristics in Eucalyptus pellita (Red Mahogany) plantings should elucidate whether mixtures:
1. grow (above-ground woody biomass) faster than pure plantings;
2. have straighter trees with smaller branches;
3. improve soil fertility; and whether
4. differences are accentuated in subsequent rotations.
E. pellita has valuable dark-red timber, and is widely planted in north Queensland, despite variable performance (3-30 m3/ha/yr, average 10m3/ha/yr). Analyses will reveal opportunities for conservation outcomes and sustainable timber production.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
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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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
Forestry effects on headwater ecosystem health: a multi-catchment experiment. Most catchments in southern Australia have been logged historically. Increasingly, native forest harvesting occurs in regrowth or drier areas. Although foresters have empirical data on ecological effects of harvesting in pristine or wetter catchments, little exists for drier regrowth areas, hampering effective management to minimize impacts on stream ecosystem health. This project will supply ecological data on stre ....Forestry effects on headwater ecosystem health: a multi-catchment experiment. Most catchments in southern Australia have been logged historically. Increasingly, native forest harvesting occurs in regrowth or drier areas. Although foresters have empirical data on ecological effects of harvesting in pristine or wetter catchments, little exists for drier regrowth areas, hampering effective management to minimize impacts on stream ecosystem health. This project will supply ecological data on stream ecosystems to supplement 4 years of hydrological data collected by Forests NSW from 5 experimental catchments. Results will provide a firmer scientific basis for ecologically sustainable harvesting in this forest type, with flow-on benefits to our national economy, biodiversity, and environment.Read moreRead less
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
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
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
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0668477
Funder
Australian Research Council
Funding Amount
$350,000.00
Summary
Upgrade of existing university low field and high field nuclear magnetic resonance facilities. The ongoing pursuit of new medicines and therapies, the development of sustainable forestry management practices and the assessment of the impact of global climate change on Australian forest soils are some of the research objectives being addressed by researchers at Griffith University. The Eskitis Institute for Cell and Molecular Therapies and the Centre for Forestry and Horticultural Research (CFHR) ....Upgrade of existing university low field and high field nuclear magnetic resonance facilities. The ongoing pursuit of new medicines and therapies, the development of sustainable forestry management practices and the assessment of the impact of global climate change on Australian forest soils are some of the research objectives being addressed by researchers at Griffith University. The Eskitis Institute for Cell and Molecular Therapies and the Centre for Forestry and Horticultural Research (CFHR) bring together researchers from a range of disciplines to further research in these key areas. The instruments funded here will provide researchers with access to spectroscopic facilities with state-of-the-art performance. This will ensure the continued international competitiveness and the sustained productivity of our research programmes.Read moreRead less