Forest ecosystem water use: Does species diversity matter? Forest water use and susceptibility to drought are major concerns for forest plantation establishment in Australia. This research will provide fundamental information about how plantation water use and drought tolerance are modified by species diversity. This work has the potential to transform tree plantation establishment practices toward inclusion of greater species diversity or toward species with particular complementary traits. It ....Forest ecosystem water use: Does species diversity matter? Forest water use and susceptibility to drought are major concerns for forest plantation establishment in Australia. This research will provide fundamental information about how plantation water use and drought tolerance are modified by species diversity. This work has the potential to transform tree plantation establishment practices toward inclusion of greater species diversity or toward species with particular complementary traits. It has significant potential to enhance benefits from reforestation projects, including better drought survival, reduced water use, soil bioremediation and enhanced biodiversity. Read moreRead less
Setting and achieving realistic restoration goals in human-dominated ecosystems. Federal and state programs and community and NGO activities increasingly focus on ecosystem restoration as a tool in conservation and natural resource management. Clearer understanding of ecosystem dynamics and better articulation of realistic restoration goals can lead to much improved restoration success and better investment of government and private funds. This project will provide a better understanding of ecos ....Setting and achieving realistic restoration goals in human-dominated ecosystems. Federal and state programs and community and NGO activities increasingly focus on ecosystem restoration as a tool in conservation and natural resource management. Clearer understanding of ecosystem dynamics and better articulation of realistic restoration goals can lead to much improved restoration success and better investment of government and private funds. This project will provide a better understanding of ecosystem dynamics both under current conditions and also as influenced by future environmental changes. The contribution to the theoretical and conceptual development of the field of restoration ecology will increase the profile of Australian science and enhance our reputation as leaders in this field. 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
Carboxylate exudation and phosphate nutrition in Hakea prostrata (Proteaecea). Nonmycorrhizal Proteaceae are very successful in acquiring phosphate from nutrient-impoverished soils; their cluster roots account for this. They are also extremely sensitive to phosphate toxicity. We will elucidate aspects of production and release of carboxylates that are associated with functioning of cluster roots, using Hakea prostrata (Proteaceae) as a model. Types and rates of exudation by cluster roots, as in ....Carboxylate exudation and phosphate nutrition in Hakea prostrata (Proteaecea). Nonmycorrhizal Proteaceae are very successful in acquiring phosphate from nutrient-impoverished soils; their cluster roots account for this. They are also extremely sensitive to phosphate toxicity. We will elucidate aspects of production and release of carboxylates that are associated with functioning of cluster roots, using Hakea prostrata (Proteaceae) as a model. Types and rates of exudation by cluster roots, as influenced by development and environmental signals, will be assessed. Our findings will provide key information on adaptive mechanisms associated with both phosphate acquisition from phosphate-fixing soils and phosphate toxicity.Read moreRead less
Models for biodiversity futures for massively altered agricultural landscapes. Problems with soil and water and declines in native biodiversity have been linked to clearance of native vegetation. We consider future landscapes with substantially more native vegetation than at present to deal with these natural resource problems. Plantings will be slow to mature so optimal planning for landscape revegetation must consider how long it will take for the new vegetation to provide suitable habitat, bo ....Models for biodiversity futures for massively altered agricultural landscapes. Problems with soil and water and declines in native biodiversity have been linked to clearance of native vegetation. We consider future landscapes with substantially more native vegetation than at present to deal with these natural resource problems. Plantings will be slow to mature so optimal planning for landscape revegetation must consider how long it will take for the new vegetation to provide suitable habitat, both at patch and landscape scales. We will develop an optimization framework incorporating models of vegetation maturation and biotic responses to aid designs for placement and scheduling of replantings to give the best outcomes for biodiversity management given constraints on amounts of retired area and costs of implementation.Read moreRead less
Towards sustainable floodplain communities: Assessing River Red Gum health. Floodplain vegetation in Australia has suffered severe degradation from river regulation but there is limited understanding of the functioning, responses and requirements of the ecosystem's most critical species, the River Red Gum. We will address three knowledge gaps needed for effective management of floodplain river red gums by assessing current and past health, determining stressors affecting health and by building ....Towards sustainable floodplain communities: Assessing River Red Gum health. Floodplain vegetation in Australia has suffered severe degradation from river regulation but there is limited understanding of the functioning, responses and requirements of the ecosystem's most critical species, the River Red Gum. We will address three knowledge gaps needed for effective management of floodplain river red gums by assessing current and past health, determining stressors affecting health and by building a model for predicting future health based on projected trends. Outcomes from this study will help land managers to prioritise environmental flow allocations based on the requirements for sustaining future river red gum populations.Read moreRead less
Reconstructing landscapes for biodiversity: From predictive modelling to future scenarios. Many landscapes around the world have been effectively denuded of natural vegetation, causing precipitous declines in native biodiversity. Mitigation of such effects in the near/medium-term future requires substantial ecological advice. We will employ our skills developed in modelling distributions of species across landscapes based on terrain, soils and climate to assess alternative landscape-reconstructi ....Reconstructing landscapes for biodiversity: From predictive modelling to future scenarios. Many landscapes around the world have been effectively denuded of natural vegetation, causing precipitous declines in native biodiversity. Mitigation of such effects in the near/medium-term future requires substantial ecological advice. We will employ our skills developed in modelling distributions of species across landscapes based on terrain, soils and climate to assess alternative landscape-reconstruction scenarios. This links use of existing data sets for initial modelling, a validation phase for testing model reliability and for refining models, and a subsequent GIS-based modelling phase in which alternative options for reconstructing landscapes are evaluated for their effectiveness in sustaining landscape-scale native biodiversity.Read moreRead less
Australian Laureate Fellowships - Grant ID: FL0992007
Funder
Australian Research Council
Funding Amount
$3,000,000.00
Summary
Intervention ecology: managing ecosystems in the 21st century. The research will tackle fundamental issues relating to how we manage and restore ecosystems in Australia (and worldwide) in the face of rapid environmental change, an issue recognised as being of increasingly pressing importance. It will provide a better understanding of ecosystem dynamics in the face of future environmental changes, and develop an approach that considers different forms of management intervention, how these might b ....Intervention ecology: managing ecosystems in the 21st century. The research will tackle fundamental issues relating to how we manage and restore ecosystems in Australia (and worldwide) in the face of rapid environmental change, an issue recognised as being of increasingly pressing importance. It will provide a better understanding of ecosystem dynamics in the face of future environmental changes, and develop an approach that considers different forms of management intervention, how these might be triggered and what the ecological and social consequences might be. This will contribute both to the theoretical and conceptual development of ecology, restoration ecology and conservation biology and to policy and management in Australia and elsewhere.Read moreRead less
Fire management of complex rehabilitated forests - quantifying and understanding spatial variability of forest structure and fuels. Up to 5 million ha of forest is burnt by bushfire in Australia in severe fire years. The cost of fire suppression in 2002/3 in WA was in excess of 12 million dollars. Consequently, development and application of technologies and knowledge for enhancing fire management and reducing wildfire risk is of high priority and substantial economic, social and environmental b ....Fire management of complex rehabilitated forests - quantifying and understanding spatial variability of forest structure and fuels. Up to 5 million ha of forest is burnt by bushfire in Australia in severe fire years. The cost of fire suppression in 2002/3 in WA was in excess of 12 million dollars. Consequently, development and application of technologies and knowledge for enhancing fire management and reducing wildfire risk is of high priority and substantial economic, social and environmental benefit. The opportunity to conduct experimental fires across a complex landscape will enable calibration and development of technologies not previously possible. This research will define the way prescribed fire is used to integrate young rehabilitated forest into management of the broader landscape and develop more cost-effective tools for fire management.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