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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
Environmental fingerprints of biogeochemical cycles embedded in tree rings: Linking global climate change to local long-term forest productivity. Forests cover one-third of the Earth's land surface and account for 80-90% of plant carbon and 30-40% of soil carbon. Forest carbon stocks and dynamics respond to and interact with global climate change (GCC). Recent tree ring research highlights the worsening impact of GCC and acid deposition on long-term forest productivity in central Europe. This pr ....Environmental fingerprints of biogeochemical cycles embedded in tree rings: Linking global climate change to local long-term forest productivity. Forests cover one-third of the Earth's land surface and account for 80-90% of plant carbon and 30-40% of soil carbon. Forest carbon stocks and dynamics respond to and interact with global climate change (GCC). Recent tree ring research highlights the worsening impact of GCC and acid deposition on long-term forest productivity in central Europe. This project seeks to develop and apply novel tree ring technologies for linking biogeochemical cycles of carbon and nutrients to long-term forest productivity in different regions, and to provide a scientific basis for accounting for long-term forest productivity and carbon stocks in response to future GCC.Read moreRead less
The nature and ecological functions of soil soluble organic nitrogen in contrasting forest ecosystems. This project employs a series of innovative techniques to investigate the dynamic nature and ecological significance of soil soluble organic nitrogen - one of the important nutrient pools, in contrasting tropical, subtropical and temperate forest ecosystems. The successful conduct of this project will lead to: a) better fertilization recommendation schemes, reduced ecosystem N losses, improved ....The nature and ecological functions of soil soluble organic nitrogen in contrasting forest ecosystems. This project employs a series of innovative techniques to investigate the dynamic nature and ecological significance of soil soluble organic nitrogen - one of the important nutrient pools, in contrasting tropical, subtropical and temperate forest ecosystems. The successful conduct of this project will lead to: a) better fertilization recommendation schemes, reduced ecosystem N losses, improved forest productivity and sustainability, minimised environmental pollution and improved water quality in forested watersheds; b) effective conservation of biodiversity in both managed and natural forests; and c) enhanced international cooperation and reputation of the Australian scientists in the relevant research fields.Read moreRead less
Improved growth of Pinus radiata through better modelling and management of photosynthesis and respiration. This research will use recently developed technologies to deliver the first comprehensive analysis of the effects of thinning and fertilizer on distribution of photosynthetically active proteins and nitrogenous metabolites in P. radiata. We seek to develop mechanistic and empirical understandings of photosynthesis, respiration, water use and growth and thus better model and predict effec ....Improved growth of Pinus radiata through better modelling and management of photosynthesis and respiration. This research will use recently developed technologies to deliver the first comprehensive analysis of the effects of thinning and fertilizer on distribution of photosynthetically active proteins and nitrogenous metabolites in P. radiata. We seek to develop mechanistic and empirical understandings of photosynthesis, respiration, water use and growth and thus better model and predict effects of management actions on yield of commercial softwood plantations. We will also apply similarly new but complementary and compatible technologies to assess photosynthesis, water use and respiration characteristics of a range of P. radiata genotypes of known growth potential. Our aim here is to develop new tools to help selection of high-yielding genotypes. The data collected will again be used to inform our development of a new growth model where the 'driver' of growth is respiration and where hydraulic architecture and soil water balance limits photosynthesis and water use.
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Soil microbial ecology and function in forest nutrient cycling: Improving the understanding and management with bio-molecular and stable isotope techniques. An improved understanding of soil microbial ecology and function is required to advance our knowledge and management of important carbon and nutrient cycling processes underpinning forest productivity and sustainability. Recent advances in bio-molecular techniques and application of stable isotope 13C and 15N methodologies have highlighted t ....Soil microbial ecology and function in forest nutrient cycling: Improving the understanding and management with bio-molecular and stable isotope techniques. An improved understanding of soil microbial ecology and function is required to advance our knowledge and management of important carbon and nutrient cycling processes underpinning forest productivity and sustainability. Recent advances in bio-molecular techniques and application of stable isotope 13C and 15N methodologies have highlighted the exciting opportunities and potential for studying soil microbial ecology and function in forest nutrient cycling. These innovative bio-molecular and stable isotope techniques will be effectively used to examine the impacts of management practices and global change on the soil carbon and nutrient cycling processes for enhancing both productivity and environmental benefits of forest ecosystems.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