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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
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
Forest ecosystem diversity, function and service in response to perturbations: the key regulatory role of biogeochemical cycling. The natural and anthropogenic perturbations such as elevated atmospheric carbon dioxide (CO2), nitrogen(N) deposition, fires and land contamination have transformed much of the land surface on the earth and significantly modified terrestrial biogeochemical cycles in the past century. This project seeks to develop and apply novel nuclear magnetic resonance spectroscopy ....Forest ecosystem diversity, function and service in response to perturbations: the key regulatory role of biogeochemical cycling. The natural and anthropogenic perturbations such as elevated atmospheric carbon dioxide (CO2), nitrogen(N) deposition, fires and land contamination have transformed much of the land surface on the earth and significantly modified terrestrial biogeochemical cycles in the past century. This project seeks to develop and apply novel nuclear magnetic resonance spectroscopy, isotopic and bio-molecular techniques to examine the key role of interactive biogeochemical cycles of carbon and major elements (N, Phosphorous) in regulating forest ecosystem responses to these perturbations. This project will result in improved mitigation and adaptation strategies for such perturbations, thereby restoring and sustaining forest ecosystems and conserving biodiversity in natural ecosystems.Read moreRead less