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How does warming prevent soil nitrogen availability from declining in response to elevated CO2? The sustainable use of the terrestrial environment depends upon maintaining ecosystem productivity which in turn depends upon nutrient availability within the soil. Increasing levels of CO2 in the atmosphere are known to decrease nutrient availability while warming prevents this from happening. The aims of this project are to determine how warming is able to prevent elevated CO2 concentrations from re ....How does warming prevent soil nitrogen availability from declining in response to elevated CO2? The sustainable use of the terrestrial environment depends upon maintaining ecosystem productivity which in turn depends upon nutrient availability within the soil. Increasing levels of CO2 in the atmosphere are known to decrease nutrient availability while warming prevents this from happening. The aims of this project are to determine how warming is able to prevent elevated CO2 concentrations from reducing soil N availability and hence productivity in a native grassland ecosystems. This is important, as it will allow likely problems caused by global climate change to be predicted by increasing the understanding of the underlying mechanisms as well as improving the management of grasslands in an environmentally sustainable way. Read moreRead less
Vineyard soil health and microbial biodiversity under different cover crop and floor management practices. This project will examine vineyard ?soil health? by monitoring the populations of soil microorganisms under different vineyard cultural practices, with an emphasis on microbial populations capable of suppressing soil borne disease and of increasing the nutrient uptake by the vine. The project will identify vineyard cover crop and floor management practices for the improvement of soil healt ....Vineyard soil health and microbial biodiversity under different cover crop and floor management practices. This project will examine vineyard ?soil health? by monitoring the populations of soil microorganisms under different vineyard cultural practices, with an emphasis on microbial populations capable of suppressing soil borne disease and of increasing the nutrient uptake by the vine. The project will identify vineyard cover crop and floor management practices for the improvement of soil health and sustainability in the rapidly expanding wine industry, providing considerable economic and environmental advantages to regional and rural communities.Read moreRead less
Understanding fungal diversity and functioning in forest soils using molecular and stable isotope approaches. The project aims to investigate fungal community structure and functioning in forest soils using novel molecular, stable isotope and physiological approaches. This will provide new insights into the linkage between diversity and functioning in forest soil fungal communities and the importance of these organisms in ecosystem processes. In addition, this pioneering research will facilitate ....Understanding fungal diversity and functioning in forest soils using molecular and stable isotope approaches. The project aims to investigate fungal community structure and functioning in forest soils using novel molecular, stable isotope and physiological approaches. This will provide new insights into the linkage between diversity and functioning in forest soil fungal communities and the importance of these organisms in ecosystem processes. In addition, this pioneering research will facilitate development and refinement of methodologies that will pave the way for future investigations of fungal ecology. The on-going collaboration will produce high quality joint publications and provide significant opportunities for early career researchers to gain international experience in a dynamic research environment.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150100408
Funder
Australian Research Council
Funding Amount
$393,416.00
Summary
Understanding plant:fungal communication to increase plant productivity. Relationships between mutualistic fungi and plants are exploited as they foster plant productivity and vigour. One significant problem facing the agro-forestry and agricultural industries is that the ability of beneficial fungi to colonise plant hosts is highly dependent on the genetic background of the host. Ultimately, this means that if fungal inoculants are not matched with the appropriate plant host, maximal benefits f ....Understanding plant:fungal communication to increase plant productivity. Relationships between mutualistic fungi and plants are exploited as they foster plant productivity and vigour. One significant problem facing the agro-forestry and agricultural industries is that the ability of beneficial fungi to colonise plant hosts is highly dependent on the genetic background of the host. Ultimately, this means that if fungal inoculants are not matched with the appropriate plant host, maximal benefits from these relationships are not achieved. This project aims to identify the first genetic markers to be used for matching plants with appropriate fungal isolates, thereby guaranteeing optimal plant performance. This will add a critical component to the global effort of increasing the productivity of our natural resources.Read moreRead less
Factors controlling ectomycorrhizal contributions to plant N nutrition. This project aims to define the mechanistic link between nitrogen metabolism in symbiotic ectomycorrhizal fungi and its effect on the quantity of nitrogen shared with a plant host. Using a genetically diverse population of a key Australian fungal species, the project expects to uncover genetic features related to nitrogen metabolism that correlate to improved support of plant nutrition. Expected outcomes include better under ....Factors controlling ectomycorrhizal contributions to plant N nutrition. This project aims to define the mechanistic link between nitrogen metabolism in symbiotic ectomycorrhizal fungi and its effect on the quantity of nitrogen shared with a plant host. Using a genetically diverse population of a key Australian fungal species, the project expects to uncover genetic features related to nitrogen metabolism that correlate to improved support of plant nutrition. Expected outcomes include better understanding of plant-microbe interactions, groundwork for tools to better model the role of fungi in soil nutrient cycling and guidelines for plant:fungal pairings in reforestation practices. Overall, these should provide significant benefit to the global effort in understanding the role of soil microbes in plant nutrition.Read moreRead less
Characterising controls of carbon flow from trees into mycorrhizal fungi. This project aims to improve our understanding of below-ground carbon sequestration. A significant portion of plant photosynthate is shuttled to root-associated mutualistic ectomycorrhizal fungi in forest ecosystems. Therefore, fungal partners of forest trees are valuable carbon sinks. One problem impeding below-ground carbon accounting in forest soils is a lack of understanding concerning the genetic control of how photos ....Characterising controls of carbon flow from trees into mycorrhizal fungi. This project aims to improve our understanding of below-ground carbon sequestration. A significant portion of plant photosynthate is shuttled to root-associated mutualistic ectomycorrhizal fungi in forest ecosystems. Therefore, fungal partners of forest trees are valuable carbon sinks. One problem impeding below-ground carbon accounting in forest soils is a lack of understanding concerning the genetic control of how photosynthetically fixed sugars are passed to root-associated microbes. This project aims to identify and characterise the sugar transporters that shuttle carbon in ectomycorrhizal plant–fungal interactions and investigate how these are affected by elevated carbon dioxide. It may also identify isolates of mutualistic fungi that could be paired with eucalypt hosts to maximise carbon sequestration and forest productivity.Read moreRead less
Get tough, get toxic or get a bodyguard: how root herbivores shape grass defences. The weight of root-feeding beetles can exceed that of sheep on Australian pastures and can result in significant losses in productivity. Grasses fight back against aboveground herbivores using toughness (physical defence), toxicity (chemical defence) and bodyguards (recruitment of the herbivore’s enemies). Little is known about belowground defences however, but grasses depend on roots for re-growth so good root de ....Get tough, get toxic or get a bodyguard: how root herbivores shape grass defences. The weight of root-feeding beetles can exceed that of sheep on Australian pastures and can result in significant losses in productivity. Grasses fight back against aboveground herbivores using toughness (physical defence), toxicity (chemical defence) and bodyguards (recruitment of the herbivore’s enemies). Little is known about belowground defences however, but grasses depend on roots for re-growth so good root defences seem essential. This study will apply optimal defence theory to consider these three defences against belowground herbivory across a range of grasses. The project will ask whether domestication has disarmed grass species and if defensive traits differ between photosynthetic pathways, before field-testing these patterns with root herbivore populations. Read moreRead less
Switching partners: a driving force for tree productivity in a changing environment? Eucalypts take part in a mutually beneficial association with diverse communities of mycorrhizal fungi to satisfy nutrient demands. The fungi that eucalypts interact with change as they grow but the reasons for this shift are not known. To improve forestry management strategies, the project will determine why and how this shift occurs.
Fingerprinting the soil microbial metagenome. The understanding of the impact of current farming systems on soil biology is in its infancy. Technology previously used to examine soil biology only investigates a very small percentage of all soil organisms. We will use an innovative new technology (DArT) to rapidly gain an overview of all soil microbial biodiversity. We will then evaluate the impact of agricultural practices on that biodiversity, firstly based on our long term trial site exhibiti ....Fingerprinting the soil microbial metagenome. The understanding of the impact of current farming systems on soil biology is in its infancy. Technology previously used to examine soil biology only investigates a very small percentage of all soil organisms. We will use an innovative new technology (DArT) to rapidly gain an overview of all soil microbial biodiversity. We will then evaluate the impact of agricultural practices on that biodiversity, firstly based on our long term trial site exhibiting common farming practices, and then by a broader regional survey. Our longer term goal is to find microbiological indicators of healthy soil through a vastly improved ability to determine a wide range of beneficial and disease organisms to identify sustainable farming practices.Read moreRead less
Biofertiliser technology for improved yields and environmental sustainability of rice and wheat crops. Australia faces the double challenge of improving the efficiency of its crop production while minimising the agricultural impact on its fragile biodiversity. Our project will meet this challenge by providing the technology for using natural biofertilisers in cereal crops. This will reduce our heavy reliance on chemical fertilisers - with associated soil loss, salinity and acidity, and high dema ....Biofertiliser technology for improved yields and environmental sustainability of rice and wheat crops. Australia faces the double challenge of improving the efficiency of its crop production while minimising the agricultural impact on its fragile biodiversity. Our project will meet this challenge by providing the technology for using natural biofertilisers in cereal crops. This will reduce our heavy reliance on chemical fertilisers - with associated soil loss, salinity and acidity, and high demand on scarce water resources - and significantly increase our crop yields. Our advances will help Australian farmers to reduce the costs and increase the productivity of our substantial export crops while improving their environmental sustainability.Read moreRead less