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Restoration and Conservation

Forest and woodland areas have seen significant declines due to historical and current land use practices. Restoration of these areas requires a solid foundation in scientific research. Projects in this research area focus on developing techniques for restoration that are cost effective, successful and provide the structural complexity of the original landscape. There is also a focus on ensuring that restoration is conducted that will be able to adapt to future climate conditions, with studies examining the role of species and provenance choice on restoration success.

Current Projects

Climate adaptation capacity in Australia's declining woodlands

Supervisors: Peter Harrison, Rebecca Jordan (CSIRO), René Vaillancourt, Julianne O’Reilly-Wapstra

This research project is on the adaptive capacity of a south-east Australian eucalypt species, Eucalyptus ovata to climate change. Eucalyptus ovata was once much more common across Tasmania, but land-use change has resulted in the clearing and fragmentation of populations and now climate change may be causing tree decline. Restoration of native ecosystems will be vital in mitigating the impact of climate change. Research into best practices for conservation and restoration under changing climate is imperative to ensure the best outcome into the future. This project is using population and landscape genomics to aid restoration of this important grassland and riparian species.

headshot of Meridy Price

The impacts of assisted migration and translocation on community genetics in restoration ecology

Supervisors: Dr Peter Harrison, Assoc Prof Julianne O’Reilly-Wapstra & Dr Glen Bain

This project aims to investigate how the genetics of trees shape dependent community composition using a multi-provenance field trial of two eucalypt species, Eucalyptus pauciflora and Eucalyptus ovata. I will apply community genetics theory to an applied restoration problem by investigating how the provenance of foundation trees influence the arthropod and fungal communities that colonise and establish in the canopy, and whether this has extended effects across trophic levels through the foraging behaviour of insectivorous birds.

The flow-on effects of translocation are particularly important to understand in a restoration context, as foundation species such as forest trees have been shown to exert an extended phenotype effect on above- and below-ground dependent communities. Results from this study will improve understanding of differential provenance performance and inform restoration planting strategies for future climate change resilience.

headshot of Alice Grieve

Forty spotted pardalote and manna gum: joining the spots to save an Australian endangered bird species

Supervisors: Associate Professor Julianne O'Reilly-Wapstra, Dr Geoff While, Dr Peter Harrison

Understanding how flora and fauna interact across both ecological and evolutionary time scales represents a major challenge that is fundamental for biodiversity conservation.

This project will address this issue by investigating what drives variation availability and quality of food for one of Australia’s most endangered birds, the forty-spotted pardalote (Pardalotus quadragintus). The forty-spotted pardalote relies on manna, a sugary exudate produced by manna gum (Eucalyptus viminalis). Manna is a key resource for a range of woodland birds, however, the forty-spotted pardalote is the only species that actively stimulates manna production through its unique mining behaviours. This interaction could have a range of cascading effects on other species, communities and even the wider ecosystem. Thus, it is critical to understand what factors underpin variation in manna quantity and quality, and how these factors drive pardalote behaviour, fitness and ultimately the community more broadly.

headshot of Meridy Price

Provenance choice in native forest management

Supervisors: Dr Peter Harrison, Assoc Prof Julianne O’Reilly-Wapstra and Dr Dean Williams

Forest tree species are expected to be negatively affected by climate change as unprecedented selective pressures cause an increase in local extinction events. This project will examine the influence of seed source (provenance) choice on the performance and resilience of eucalypt forest revegetation by generating new knowledge on the genetic basis of climate adaptation in the ash eucalypts (Eucalyptus obliquaE. delegatensisE. regnans).

Signals of adaptation will be detected at three genetic levels. At the individual-level, differences in gene expression through epigenetic modifications following a climate stress event will be examined using a controlled glasshouse experiment and an integrated DNA-methylation and metabolomics approach. At the population-level, changes in allele frequency of single nucleotide polymorphisms (SNPs) along climatic gradients will be uncovered using a genome-environment association analysis to identify regions and underlying gene families putatively associated with climate adaptation. At the species-level, parallel responses of the ash eucalypts to climate will be examined through a joint phenotype-genotype approach to understand the extent to which climate adaptation can be predicted and extrapolated to other species. The performance of seed will then be experimentally tested using field trials to determine early establishment transfer functions.

This project will contribute to our understanding of forest tree adaptations and their vulnerability to future climate stress, and provide an evidence-based framework for seed-sourcing to promote resilient forest revegetation in the face of climate change, thus improving the management of forest resources globally.

headshot of Ellen