Novel, Cost-Effective Methods for Measuring Methane Emissions from Grazing Livestock. Agriculture is second only to energy generation as a source of greenhouse gas emissions in Australia. Methane from cattle and sheep constitute 60% of these agricultural emissions. Their abatement is a win-win goal for the agricultural industry, reducing greenhouse emissions while increasing food efficiency. This project will develop a novel, cost- and-labour efficient method for on-farm measurements of the emis ....Novel, Cost-Effective Methods for Measuring Methane Emissions from Grazing Livestock. Agriculture is second only to energy generation as a source of greenhouse gas emissions in Australia. Methane from cattle and sheep constitute 60% of these agricultural emissions. Their abatement is a win-win goal for the agricultural industry, reducing greenhouse emissions while increasing food efficiency. This project will develop a novel, cost- and-labour efficient method for on-farm measurements of the emissions of methane from free-grazing cattle and sheep in their undisturbed environment. The method will be used to assess the dependence of methane emissions on factors such as diet and the efficacy of proposed methods for abatement of methane emissions, as well as providing improved data to the National Greenhouse Gas Inventory.Read moreRead less
Evolution of diverse symbiotic phenotypes among native soil bacteria following spread of a genomic island from a rhizobial inoculant. The quality of legume protein depends on symbiotic nitrogen fixation by root nodule bacteria (RNB). Sustainable legume production in Australian agriculture depends on legume inoculation with effective strains of these bacteria. Unfortunately inoculant strains transfer DNA to other soil bacteria resulting in soil populations of RNB that compete for nodulation but a ....Evolution of diverse symbiotic phenotypes among native soil bacteria following spread of a genomic island from a rhizobial inoculant. The quality of legume protein depends on symbiotic nitrogen fixation by root nodule bacteria (RNB). Sustainable legume production in Australian agriculture depends on legume inoculation with effective strains of these bacteria. Unfortunately inoculant strains transfer DNA to other soil bacteria resulting in soil populations of RNB that compete for nodulation but are less effective in nitrogen fixation. This transfer of DNA threatens a $2 billion asset in Australian agriculture. We will use molecular microbial ecology to investigate the mechanisms of genetic transfer of symbiotic DNA in RNB, and use this knowledge to prevent it.Read moreRead less
Assessing the viability of ecosystem processes in habitat fragments: lessons from land-clearing in the tropical savannas. Climate change and land degradation in southern Australia is increasing the demand for agricultural land in northern Australia. Broad scale land-clearing is prohibited in all Australian jurisdictions apart from the Northern Territory. However, our understanding of the impact of fragmentation on ecosystems processes in tropical savannas is poor. This research will set new stan ....Assessing the viability of ecosystem processes in habitat fragments: lessons from land-clearing in the tropical savannas. Climate change and land degradation in southern Australia is increasing the demand for agricultural land in northern Australia. Broad scale land-clearing is prohibited in all Australian jurisdictions apart from the Northern Territory. However, our understanding of the impact of fragmentation on ecosystems processes in tropical savannas is poor. This research will set new standards in pursuit of sustainability and conservation objectives within a regional planning context for northern Australian landscapes. We aim to contribute to a sustainability framework and integrated planning process for tropical savannas, so that it reaches its agricultural potential in a sustainable way, while maintaining the area's natural systems and biodiversity.Read moreRead less
Use of Distichlis spicata for sustainable forage production on saline land to manage dryland salinity. Sustainable and productive use of salt-affected lands is a priority for many farmers. This project aims to develop management strategies that optimise yield, water use and nutritive value of Distichlis spicata (a salt-tolerant grass) forage on salinised lands, and to understand how this forage species affects the salt cycle, water use and fertility improvement of saline soils.