Landscape level effects on dispersal behaviour and gene flow in the logrunner, a rainforest restricted bird. Dispersal is thought to be critical for the persistence of small avian populations in fragmented landscapes. However, our knowledge of dispersal is limited. I will combine behavioural observations on radiotagged birds and powerful genetic markers to examine the effects of habitat fragmentation on the dispersal behaviour of a rainforest restricted bird, the logrunner. This study will deter ....Landscape level effects on dispersal behaviour and gene flow in the logrunner, a rainforest restricted bird. Dispersal is thought to be critical for the persistence of small avian populations in fragmented landscapes. However, our knowledge of dispersal is limited. I will combine behavioural observations on radiotagged birds and powerful genetic markers to examine the effects of habitat fragmentation on the dispersal behaviour of a rainforest restricted bird, the logrunner. This study will determine how landscape structure influences the movement of juvenile logrunners, investigate the causes and consequences of variation in juvenile dispersal behaviour, and use molecular data to determine how connectivity between habitats effects the genetic structure of logrunner populations.Read moreRead less
Landscape-scale population dynamics of open forests in the Australian monsoon tropics. Over the last century there has been a trend of increasing tree cover in many landscapes. Yet the causes of this globally important ecological phenomenon are poorly understood, but may include the effects of climate, fire, grazing and CO2. We will determine how an area of forest has changed over 50 years in Kakadu National Park, linking forest demography with remote sensing techniques, re-measurement and analy ....Landscape-scale population dynamics of open forests in the Australian monsoon tropics. Over the last century there has been a trend of increasing tree cover in many landscapes. Yet the causes of this globally important ecological phenomenon are poorly understood, but may include the effects of climate, fire, grazing and CO2. We will determine how an area of forest has changed over 50 years in Kakadu National Park, linking forest demography with remote sensing techniques, re-measurement and analysis of long-term tree demography datasets, and simulation models of tree population dynamics on a landscape scale. This will provide a scientific framework to develop sustainable land management and the conservation of Australia's forest biodiversity.Read moreRead less
Tree water use and amelioration of dryland salinity. Dryland salinity is a huge problem for large areas of Australia. One proposal for ameliorating dryland salinity is to plant trees in upslope sites in the landscape. Such planted forests reduce movement of water through the landscape, thereby reducing mobilisation and discharge of stored salts downslope onto agricultural and sensitive riparian areas. This project will investigate tree water use in a native forest, compare it with a planted fo ....Tree water use and amelioration of dryland salinity. Dryland salinity is a huge problem for large areas of Australia. One proposal for ameliorating dryland salinity is to plant trees in upslope sites in the landscape. Such planted forests reduce movement of water through the landscape, thereby reducing mobilisation and discharge of stored salts downslope onto agricultural and sensitive riparian areas. This project will investigate tree water use in a native forest, compare it with a planted forest in the same location and investigate fundamental relationships among climate, tree size, canopy area and water use. The outcome of this project is a deep mechanistic understanding of the efficacy of trees for salinity abatement.Read moreRead less
Why isn’t the world full of mistletoe? An integrative approach to understanding dispersal, recruitment and distribution of parasitic plants. Parasitic plants are less affected by resource constraints than other plants, but they are characteristically rare in undisturbed habitats?an apparent paradox that challenges current thinking about ecological constraints. To determine which factors limit recruitment and distribution of parasitic plants, we will conduct integrative research on two mistleto ....Why isn’t the world full of mistletoe? An integrative approach to understanding dispersal, recruitment and distribution of parasitic plants. Parasitic plants are less affected by resource constraints than other plants, but they are characteristically rare in undisturbed habitats?an apparent paradox that challenges current thinking about ecological constraints. To determine which factors limit recruitment and distribution of parasitic plants, we will conduct integrative research on two mistletoes and a sandalwood in a structurally simple semi-arid shrubland, combining experimental germination trials and chemical analyses of hosts with ecological studies of seed vectors in a spatially-explicit framework. This study will also yield powerful insights into the general mechanisms underlying the relationships between life-history traits, species distributions and resource availability in dynamic landscapes.Read moreRead less
Managing tree densities in western New South Wales: development of a process-based model to predict woodland dynamics. This project will enhance woodland management in inland NSW by: (1) advancing our understanding of factors controlling woodland dynamics and (2) refining predictions of the effects of landuse scenarios on long-term vegetation dynamics. Outcomes will assist policy development and on-ground decision making by natural resource managers. Results will be used by managers of biodivers ....Managing tree densities in western New South Wales: development of a process-based model to predict woodland dynamics. This project will enhance woodland management in inland NSW by: (1) advancing our understanding of factors controlling woodland dynamics and (2) refining predictions of the effects of landuse scenarios on long-term vegetation dynamics. Outcomes will assist policy development and on-ground decision making by natural resource managers. Results will be used by managers of biodiversity, salinity, erosion, tree clearing, silviculture, rehabilitation and protected areas. Our findings will reduce conflicting perceptions about past and future vegetation changes in regional areas, thereby advancing uptake of sustainability plans to ensure long-term social, economic and environmental benefits for an environmentally sustainable Australia.Read moreRead less
Quantifying and mitigating the barrier effect of roads on the movement and dispersal of wildlife. In fragmented landscapes, wildlife need to move between habitat patches to exchange genes, increase the size of declining populations and recolonise areas were animals have become extinct. For many species, roads may act as barriers that prevent or limit dispersal, potentially isolating some habitats. In this study, we aim to quantify the extent to which major highways in regional Australia form a ....Quantifying and mitigating the barrier effect of roads on the movement and dispersal of wildlife. In fragmented landscapes, wildlife need to move between habitat patches to exchange genes, increase the size of declining populations and recolonise areas were animals have become extinct. For many species, roads may act as barriers that prevent or limit dispersal, potentially isolating some habitats. In this study, we aim to quantify the extent to which major highways in regional Australia form a barrier to the movement of mammals and invertebrates. We will then test the effectiveness of measures that may facilitate safe crossing by measuring their rate of use, reduction in road kill and increase in population viability. This information can then be used to construct major roads that are more environmentally sustainable.Read moreRead less
A Bayesian framework for metapopulation dynamics of species in endangered communities: integrating demographic, environmental and genetic data. Biodiversity conservation is a spatial and temporal problem. Populations change in time, constrained by the structure and spatial division of their habitat. This study will develop a tool that can be used to assess the influence of environmental fluctuations and landscape heterogeneity on the persistence of endemic species in the mound springs of the Gr ....A Bayesian framework for metapopulation dynamics of species in endangered communities: integrating demographic, environmental and genetic data. Biodiversity conservation is a spatial and temporal problem. Populations change in time, constrained by the structure and spatial division of their habitat. This study will develop a tool that can be used to assess the influence of environmental fluctuations and landscape heterogeneity on the persistence of endemic species in the mound springs of the Great Artesian Basin. Using a Bayesian framework to integrate data from diverse sources, we will develop models for the biodiversity impacts of groundwater withdrawal and climate change in central Australia. These tools are essential for management of this ecosystem, which has been listed as an 'endangered community' under the Environmental Protection and Biodiversity Conservation Act of 1999.Read moreRead less
Devising ecologically sustainable restoration programs for degraded rural landscapes by integrating landscape ecology, genetics and ecophysiology. Concern about tree decline in rural landscape is widespread, and disturbingly climate change is predicted to exacerbate this problem. Past ill-considered tree plantings have proven to be economically wasteful, achieved limited ecological resilience and negligible improvement of biodiversity values. Using Tasmania as a 'model system', we will advance t ....Devising ecologically sustainable restoration programs for degraded rural landscapes by integrating landscape ecology, genetics and ecophysiology. Concern about tree decline in rural landscape is widespread, and disturbingly climate change is predicted to exacerbate this problem. Past ill-considered tree plantings have proven to be economically wasteful, achieved limited ecological resilience and negligible improvement of biodiversity values. Using Tasmania as a 'model system', we will advance this problem by undertaking research to determine how seedling establishment, tree growth, carbon storage and water use are influenced by landscape setting, management history, climate change, species type and local varieties. This research will provide a much needed evidence to devise ecologically sustainable tree-plantings in southern Australia.Read moreRead less
Fire regimes and demographic responses interact to threaten woody species. This project aims to extend and test an Interval Squeeze conceptual model which predicts fire-climate interaction effects on plant species persistence. Complex processes affect future species persistence, and an evidence-based conceptual framework is needed. Working across two continents, this project will quantify the effects of projected shortening of fire intervals, lower rainfall and elevated temperatures on woody pla ....Fire regimes and demographic responses interact to threaten woody species. This project aims to extend and test an Interval Squeeze conceptual model which predicts fire-climate interaction effects on plant species persistence. Complex processes affect future species persistence, and an evidence-based conceptual framework is needed. Working across two continents, this project will quantify the effects of projected shortening of fire intervals, lower rainfall and elevated temperatures on woody plant species. Field evidence spans global change predictions, ecosystems and species representing key system dominants and functional response types. The project will synthesise this data into larger simulation models and extend its conceptual framework to directly inform conservation and fire management.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE160101141
Funder
Australian Research Council
Funding Amount
$366,000.00
Summary
Critical regions and network connectivity of coral reef ecosystems. This project aims to measure the degree of connectivity between isolated reefs in Australia's Coral Sea and the Great Barrier Reef and identify the biological and environmental mechanisms that enhance management strategies or mitigate against disturbances. The movement of individuals in fragmented landscapes plays a central role in the ecology and evolution of species. The project seeks to measure connectivity at multiple scales ....Critical regions and network connectivity of coral reef ecosystems. This project aims to measure the degree of connectivity between isolated reefs in Australia's Coral Sea and the Great Barrier Reef and identify the biological and environmental mechanisms that enhance management strategies or mitigate against disturbances. The movement of individuals in fragmented landscapes plays a central role in the ecology and evolution of species. The project seeks to measure connectivity at multiple scales and identify critical regions for the design of networks of marine protected areas. This is anticipated to improve our understanding of connectivity in marine seascapes and benefit management of important fishery species and current efforts in coral reef conservation.Read moreRead less