Testing the importance of large-scale climate factors to plant community assembly following land-use change. This project will examine the native plant species and functional diversity of Australia's rain forest communities to create a predictive framework of how plant communities recover following deforestation. Such a framework is key to focusing conservation efforts in degraded and multi-use landscapes.
Rapid evolution, and the dynamics and stability of ecological communities. Population sizes of species go up and down and often we do not know why. This is a problem because changes in population size underpin more complex ecological change, and understanding why population sizes change affects our ability to manage environmental impacts, and threatened, harvested and pest species. The aim of this project is to discover how rapid evolution – evolution occurring over just a few generations – driv ....Rapid evolution, and the dynamics and stability of ecological communities. Population sizes of species go up and down and often we do not know why. This is a problem because changes in population size underpin more complex ecological change, and understanding why population sizes change affects our ability to manage environmental impacts, and threatened, harvested and pest species. The aim of this project is to discover how rapid evolution – evolution occurring over just a few generations – drives changes in population sizes of plants in Australian freshwater ecosystems. By focusing on this fundamental yet poorly understood process, our results promise to rewrite our understanding of the causes of change in ecological communities, while highlighting a unique and little studied component of Australia’s biota.Read moreRead less
Habitat degradation on coral reefs. This project aims to determine how reef degradation modifies predator-prey dynamics in fish communities, and how parental effects may help species to cope with habitat change. Live corals are ecosystem engineers that support the world’s most biodiverse communities, but anthropogenic factors have led to unprecedented global declines in live coral. The transition from live to dead coral-dominated habitats is associated with a modified sensory landscape of fear f ....Habitat degradation on coral reefs. This project aims to determine how reef degradation modifies predator-prey dynamics in fish communities, and how parental effects may help species to cope with habitat change. Live corals are ecosystem engineers that support the world’s most biodiverse communities, but anthropogenic factors have led to unprecedented global declines in live coral. The transition from live to dead coral-dominated habitats is associated with a modified sensory landscape of fear for resident fishes, via chemical interference emanating from degraded coral. Inter-generational advantages would help management to regulate reef usage to promote resilience.Read moreRead less
The contribution of human/marine herbivore interactions to reef degradation. This project aims to define how interactions between human society and herbivores influence marine ecosystem structure and function. It will analyse geographic patterns from recent systematic sampling of reef communities worldwide and study fish, macro-invertebrate and meso-grazer herbivory to identify herbivores’ role in the collapse and recovery of reef ecosystems. This project will examine the match between a critica ....The contribution of human/marine herbivore interactions to reef degradation. This project aims to define how interactions between human society and herbivores influence marine ecosystem structure and function. It will analyse geographic patterns from recent systematic sampling of reef communities worldwide and study fish, macro-invertebrate and meso-grazer herbivory to identify herbivores’ role in the collapse and recovery of reef ecosystems. This project will examine the match between a critical ecosystem function and community structure across local to global scales, including the identification of non-linearities and interactions involving human effects on this process. This research is expected to safeguard marine ecosystems from collapse.Read moreRead less
Warming up predator-prey interactions. Predator-prey interactions are the building blocks of communities, but these will change with shifts in distribution due to carbon dioxide (CO2)-induced increases in temperature. Coral reefs are particularly vulnerable and the project will explore how temperature elevation will influence the physiological performance and ecology of fish to alter these fundamental interactions.
The role of drought-stress and insect attack on rainforest plant health. This project aims to examine the vulnerability of tropical plants to drought and insect attack in a large-scale field experiment. We will pioneer a new research approach that focuses on the causes and stages of decline in plant health prior to death, in order to identify the characteristics of plant species that make them more susceptible to drought and insect attack. Expected outcomes of this project include an improved ca ....The role of drought-stress and insect attack on rainforest plant health. This project aims to examine the vulnerability of tropical plants to drought and insect attack in a large-scale field experiment. We will pioneer a new research approach that focuses on the causes and stages of decline in plant health prior to death, in order to identify the characteristics of plant species that make them more susceptible to drought and insect attack. Expected outcomes of this project include an improved capacity to predict the function and composition of future forests. This project will provide significant benefits to communities concerned with the direct and indirect effects of droughts in protected areas, forestry reserves and agriculture. Read moreRead less
Why are complex habitats more diverse? This project aims to develop and test theory for the ubiquitous relationship between habitat complexity and biodiversity. Whether in forests, grasslands, kelp forests or coral reefs, habitat complexity is increasingly being flattened by natural and human-based processes. The project will integrate novel three-dimensional habitat models with established ecological theory, and then validate the theory on coral reefs that have undergone disturbances with diffe ....Why are complex habitats more diverse? This project aims to develop and test theory for the ubiquitous relationship between habitat complexity and biodiversity. Whether in forests, grasslands, kelp forests or coral reefs, habitat complexity is increasingly being flattened by natural and human-based processes. The project will integrate novel three-dimensional habitat models with established ecological theory, and then validate the theory on coral reefs that have undergone disturbances with different effects on complexity (cyclones and bleaching). This project will significantly advance the predictive capacity of biodiversity risk assessments of these threatened ecosystems and potentially others worldwide.Read moreRead less
Ecosystem quality and herbivore dynamics in tropical rainforests fragmented by deforestation. After logging, large expanses of south-east Asian rainforests are being converted to oil palm plantations. This is occurring within a mega-diverse area of global ecological and conservation significance yet the ecological consequences of this process are poorly understood. This project will examine patterns of changes in key arthropod herbivores, their food resources and natural enemies within experimen ....Ecosystem quality and herbivore dynamics in tropical rainforests fragmented by deforestation. After logging, large expanses of south-east Asian rainforests are being converted to oil palm plantations. This is occurring within a mega-diverse area of global ecological and conservation significance yet the ecological consequences of this process are poorly understood. This project will examine patterns of changes in key arthropod herbivores, their food resources and natural enemies within experimentally fragmented post-logging forests. The project will quantify the effects of fragment size, location and vegetation upon the herbivore dynamics, their impact on the vegetation and their interactions with their natural enemies. The project aid understanding the dynamics of the ecosystems involved and the services they provide.Read moreRead less
Community efficiency: testing MacArthur’s minimisation principle for competitive communities. Robert MacArthur, one of the 20th century’s greatest ecologists, developed theory that had profound impacts on our understanding of island biogeography, species coexistence, and competition, yet one of his most powerful theoretical predictions, that competitive communities should become more efficient over time, has never been tested. A greater understanding of the dynamics of community efficiency will ....Community efficiency: testing MacArthur’s minimisation principle for competitive communities. Robert MacArthur, one of the 20th century’s greatest ecologists, developed theory that had profound impacts on our understanding of island biogeography, species coexistence, and competition, yet one of his most powerful theoretical predictions, that competitive communities should become more efficient over time, has never been tested. A greater understanding of the dynamics of community efficiency will provide profound insights into the role of that community in the broader ecosystem, as well as strong predictions about the invasibility and stability of that community. Read moreRead less
Exotic and native plant coexistence in novel communities. The development of novel communities has become an inevitable outcome of global change. Despite this, we have a poor understanding of the mechanisms driving their assembly. Here, experimental and modelling approaches will be used to identify how competition among native and exotic plant species change across key environmental gradients, leading to: resilient native communities; stable novel communities - mixes of native and exotic species ....Exotic and native plant coexistence in novel communities. The development of novel communities has become an inevitable outcome of global change. Despite this, we have a poor understanding of the mechanisms driving their assembly. Here, experimental and modelling approaches will be used to identify how competition among native and exotic plant species change across key environmental gradients, leading to: resilient native communities; stable novel communities - mixes of native and exotic species; or, degraded communities dominated by exotic species. The annual plant communities of Western Australia's (WA) York Gum woodlands will be used as a model system. Outcomes will improve management of WA wildflower communities and provide a framework for predicting novel community formation worldwide.Read moreRead less