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Ecosystem Assembly in Old Fields in the Western Australian Wheatbelt. This project aims to examine the process of ecosystem re-assembly on land which is taken out of agricultural production and left without further management. Land abandonment is common in many parts of the world and could increase dramatically in Australia due to land degradation, salinity and structural change. We will investigate the factors which influence whether native plant species can recolonise abandoned farmland, usin ....Ecosystem Assembly in Old Fields in the Western Australian Wheatbelt. This project aims to examine the process of ecosystem re-assembly on land which is taken out of agricultural production and left without further management. Land abandonment is common in many parts of the world and could increase dramatically in Australia due to land degradation, salinity and structural change. We will investigate the factors which influence whether native plant species can recolonise abandoned farmland, using field and greenhouse studies. We will do this within the context of ecosystem assembly, thereby answering a practical question and also providing input to a conceptual area which is currently of great interest inRead moreRead less
A molecular ecophysiological assessment of the importance of using local provenance seed in plant biodiversity restoration. The rehabilitation of Australia's unique plant diversity, following disturbance, is an increasingly important activity nationally, involving industry, government and community. The use of local seeds is recognised as best practise, but how local is local? We will use molecular tools to identify the extent of local seed transfer zones, conduct trials to assess the relative ....A molecular ecophysiological assessment of the importance of using local provenance seed in plant biodiversity restoration. The rehabilitation of Australia's unique plant diversity, following disturbance, is an increasingly important activity nationally, involving industry, government and community. The use of local seeds is recognised as best practise, but how local is local? We will use molecular tools to identify the extent of local seed transfer zones, conduct trials to assess the relative performance of local and non-local seeds (is there a home-site advantage?), and assess the consequences of mixing provenances for future generations. We will work closely with industry and community restoration practitioners to improve the effectiveness of restoration, with benefits flowing nationally through general provenance guidelines.Read moreRead less
Ecosystem restoration of bauxite-processing residue sand disposal areas in Western Australia: Important biogeochemical processes and effective fertilisation strategies. Alumina production is one of Australia's most important mining activities. Residue from bauxite-processing must be managed appropriately to minimise detrimental impacts on the surrounding environment. The location of Alcoa's WA Refineries in environmentally- and community- sensitive areas necessitates a detailed understanding of ....Ecosystem restoration of bauxite-processing residue sand disposal areas in Western Australia: Important biogeochemical processes and effective fertilisation strategies. Alumina production is one of Australia's most important mining activities. Residue from bauxite-processing must be managed appropriately to minimise detrimental impacts on the surrounding environment. The location of Alcoa's WA Refineries in environmentally- and community- sensitive areas necessitates a detailed understanding of residue disposal area (RDA) management. Currently little is known about the biogeochemical cycling of nitrogen, phosphorus and carbon in the residue sand despite its importance for sustainable rehabilitation practice. Findings from this project are critical for developing improved fertilisation strategies and protocols for ecosystem restoration of RDAs, which will be applicable both in Australia and overseas. Read moreRead less
Soil physical limitations to growth in sub-tropical hardwood plantations. Large areas of eucalypt plantations are being established to replace native forest wood production in many areas of Australia. A major impediment facing the industry in subtropical eastern Australia is inappropriate site species matching. This is largely due to lack of understanding of the major soil types in the region and the effect on growth of different species. This project will compare site productivity and soil ch ....Soil physical limitations to growth in sub-tropical hardwood plantations. Large areas of eucalypt plantations are being established to replace native forest wood production in many areas of Australia. A major impediment facing the industry in subtropical eastern Australia is inappropriate site species matching. This is largely due to lack of understanding of the major soil types in the region and the effect on growth of different species. This project will compare site productivity and soil characteristics in two major hardwood species and investigate fundamental relationships between soil characteristics and tree root growth. The outcome will be a mechanistic understanding of soil physical limitations to tree growth.Read moreRead less
Novel strategy for optimising fertilizer input coupled with organic residue management for sustainable reconstruction of jarrah forest ecosystem. This project is aimed at judicious management of the rehabilitation process following surface mining by reducing initial fertilizer input along with using organic residue accumulated following pre-mine clearing of vegetation. This approach has the potential for 'speeding-up' the ecosystem development process by initiating early microbial development in ....Novel strategy for optimising fertilizer input coupled with organic residue management for sustainable reconstruction of jarrah forest ecosystem. This project is aimed at judicious management of the rehabilitation process following surface mining by reducing initial fertilizer input along with using organic residue accumulated following pre-mine clearing of vegetation. This approach has the potential for 'speeding-up' the ecosystem development process by initiating early microbial development in rehabilitation practice and reducing the deleterious effect of heavy fertilization. Apart from these ecological advantages, reducing fertilizer application lowers minesite rehabilitation cost incurred by mining companies. This project will be the first attempt to use organic residue and streamlining the use of mineral fertilizers in mine rehabilitation practice.Read moreRead less
Complex system dynamics: restoring riparian and riverine ecosystems. Attempts to restore damaged ecosystems reveal inadequacies in theories describing ecosystem structure and function. For rivers, it is unclear whether theories relating to fluvial geomorphology and ecosystem dynamics are adequate to predict system trajectories following restoration. We will use empirical data on a degraded river to develop cross-scale models of system function, and predict ecosystem structure and dynamics follow ....Complex system dynamics: restoring riparian and riverine ecosystems. Attempts to restore damaged ecosystems reveal inadequacies in theories describing ecosystem structure and function. For rivers, it is unclear whether theories relating to fluvial geomorphology and ecosystem dynamics are adequate to predict system trajectories following restoration. We will use empirical data on a degraded river to develop cross-scale models of system function, and predict ecosystem structure and dynamics following restoration. Following revegetation of riparian habitats and replacement of large woody debris in in-stream habitats of the river, we will test theoretical predictions about changes to physical processes, biotic community assemblage rules and food webs to develop improved ecosystem-based restoration guidelines.Read moreRead less
The evolution and maintenance of specificity, mutualism and diversity in plant-soil microbe interactions. This research will significantly advance knowledge regarding the evolution of mutualisms between plant and soil microbes. Results will provide valuable data on the importance of below-ground microbial community structure to growth and productivity of an ecologically important component of the Australian flora (Acacia spp.), and contribute to the development of best ecosystem restoration prac ....The evolution and maintenance of specificity, mutualism and diversity in plant-soil microbe interactions. This research will significantly advance knowledge regarding the evolution of mutualisms between plant and soil microbes. Results will provide valuable data on the importance of below-ground microbial community structure to growth and productivity of an ecologically important component of the Australian flora (Acacia spp.), and contribute to the development of best ecosystem restoration practices. Furthermore, it will see the continued development of the Acacia-rhizobia system as a world-class model for exploring interactions between perennial legumes and microbial symbionts. The research also investigates the adaptability and potential for rapid evolution of critical elements of the soil microflora to environmental change.Read moreRead less
Investigation of the metabolism, molecular targets and environmental fate of the seed germination stimulant, butenolide. The potent germination stimulant, known as butenolide, is expected to provide substantial benefits for improving seed germination and seedling vigour of many plant species used in agriculture, land restoration and rehabilitation. Currently, little is known about the stability, persistence and distribution of the butenolide in natural environments and the mechanism of seed dorm ....Investigation of the metabolism, molecular targets and environmental fate of the seed germination stimulant, butenolide. The potent germination stimulant, known as butenolide, is expected to provide substantial benefits for improving seed germination and seedling vigour of many plant species used in agriculture, land restoration and rehabilitation. Currently, little is known about the stability, persistence and distribution of the butenolide in natural environments and the mechanism of seed dormancy breaking. This study now provides a unique opportunity for Australian research to establish a world-leading position in understanding the processes that regulate seed dormancy, particularly in relation to post-mining land rehabilitation. The research findings will also have wider application in plant conservation, weed control and crop production.Read moreRead less
The Potential of the Fungicide Phosphite to Control the Autonomous Spread of Phytophthora cinnamomi in Natural and Rehabilitated Ecosystems. Phytophthora cinnamomi is recognised by the Federal Government as a key threatening process to Australia's biodiversity. This project will enhance the existing methodologies and protocols to improve the effectiveness and persistence of phosphite to reduce or contain the autonomous spread of this pathogen through susceptible and threatened plant communities. ....The Potential of the Fungicide Phosphite to Control the Autonomous Spread of Phytophthora cinnamomi in Natural and Rehabilitated Ecosystems. Phytophthora cinnamomi is recognised by the Federal Government as a key threatening process to Australia's biodiversity. This project will enhance the existing methodologies and protocols to improve the effectiveness and persistence of phosphite to reduce or contain the autonomous spread of this pathogen through susceptible and threatened plant communities. It will provide environmental, mining and land-care organisations with improved techniques to control P. cinnamomi in a range of plant communities and environments associated with mining and natural ecosystems.Read moreRead less
Development of cryopreservation for high value provenance collections of recalcitrant plant species used in post-mining restoration. This project will develop new and innovative ways to store highly valued native plant germplasm at ultra cold temperatures (-196 °C, in liquid nitrogen) as a means to ensure that elite genotypes used in minesite restoration and critically endangered species are not lost forever to extinction. This project will be the first of its type in Australia utilising a multi ....Development of cryopreservation for high value provenance collections of recalcitrant plant species used in post-mining restoration. This project will develop new and innovative ways to store highly valued native plant germplasm at ultra cold temperatures (-196 °C, in liquid nitrogen) as a means to ensure that elite genotypes used in minesite restoration and critically endangered species are not lost forever to extinction. This project will be the first of its type in Australia utilising a multidisciplinary approach to answer key storage questions and will provide significant national benefits to conservation programs and landcare groups, providing these with additional resources to ensure the long-term survival of native plant germplasm collections. Read moreRead less