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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.
Phyloinformatics and biodiversity: developing bioinformatic tools for understanding the dynamics of extinction and invasion within species assemblages. DNA sequence data provides an exciting new way to study biodiversity, because the genome of each organism records its evolutionary history. By analysing DNA sequences co-existing species, we can reconstruct the ecological and evolutionary history of a biological community. This allows us to track biodiversity changes over time, and examine how th ....Phyloinformatics and biodiversity: developing bioinformatic tools for understanding the dynamics of extinction and invasion within species assemblages. DNA sequence data provides an exciting new way to study biodiversity, because the genome of each organism records its evolutionary history. By analysing DNA sequences co-existing species, we can reconstruct the ecological and evolutionary history of a biological community. This allows us to track biodiversity changes over time, and examine how the state of a species assemblage determines which species are lost through extinction or gained through the invasion of exotic species. Understanding the factors that govern changes in biodiversity over time is essential for planning for future conservation in the face of a rapidly changing environment. Read moreRead less
Testing metabolic theories in ecology. There are striking similarities in the way plants and animals take up and use energy (metabolism), despite enormous variation in size and life-style. This project will make the first experimental comparison of the predictions of the two major theories for these broad patterns. The results will significantly progress this controversial and exciting field.
Optimal photosynthetic traits on ecological time-scales. This project aims to understand how soils and climate shape plant ecological strategies for nutrient and water use in photosynthesis. Terrestrial biosphere models (including ecosystem, land surface and vegetation models) are based on a biochemical model for photosynthesis that accurately represents processes on physiological time-scales but lacks the ecological-evolutionary perspective needed to understand species’ adaptations along geogra ....Optimal photosynthetic traits on ecological time-scales. This project aims to understand how soils and climate shape plant ecological strategies for nutrient and water use in photosynthesis. Terrestrial biosphere models (including ecosystem, land surface and vegetation models) are based on a biochemical model for photosynthesis that accurately represents processes on physiological time-scales but lacks the ecological-evolutionary perspective needed to understand species’ adaptations along geographic gradients of soils and climate. This project will integrate theory based on microeconomic and optimality principles with empirical analysis of local- and global-scale trait datasets. This knowledge is intended to form the core of a ‘next-generation’ global vegetation model. This will allow government agencies to discover the likely effects of future climate and carbon dioxide changes on Australian vegetation structure, function and composition, forest productivity, and biodiversity.Read moreRead less
Stress, virulence and bacterial disease in temperate seaweeds: the rise of the microbes. Climate change is predicted to increase the spread and virulence of pathogens, and decrease the resistance to disease via temperature stress on the hosts. Combined with other human impacts (higher nutrients, pollution), we may be facing a major rise in the effect of disease on natural communities. However, these effects are largely unstudied. We will investigate the impact of marine pathogens on kelps and ....Stress, virulence and bacterial disease in temperate seaweeds: the rise of the microbes. Climate change is predicted to increase the spread and virulence of pathogens, and decrease the resistance to disease via temperature stress on the hosts. Combined with other human impacts (higher nutrients, pollution), we may be facing a major rise in the effect of disease on natural communities. However, these effects are largely unstudied. We will investigate the impact of marine pathogens on kelps and other seaweeds when they are stressed by temperature, elevated nutrients or other anthropogenic stressors. Kelp are the 'trees of the oceans', the organisms responsible for creating much of the habitat that fishes and other organisms live in. The loss of kelp forests due to disease would radically change these environments.Read moreRead less
The evolution of cooperative communication. This interdisciplinary project will provide a broad understanding of communication in a model ecological system involving ants, lycaenid butterflies, and host-plants. The project will reveal the nature of the chemical signals used to communicate, and their role in the origin, maintenance, and loss of mutualistic and parasitic associations.
Drought and Salinity Tolerance in Metal Hyperaccumulating Plants: A Functional Role for the Metals? A few plant species can ?hyperaccumulate? metal ions to 100-1000 times the concentrations seen in ?normal? plants. Just why these plants have evolved such an extreme response to metalliferous soils remains an enigma. Many of the hyperaccumulators so far described are endemic to xeric environments, or saline soils prone to rapid drying. We hypothesize that the metals might act as osmotica, enha ....Drought and Salinity Tolerance in Metal Hyperaccumulating Plants: A Functional Role for the Metals? A few plant species can ?hyperaccumulate? metal ions to 100-1000 times the concentrations seen in ?normal? plants. Just why these plants have evolved such an extreme response to metalliferous soils remains an enigma. Many of the hyperaccumulators so far described are endemic to xeric environments, or saline soils prone to rapid drying. We hypothesize that the metals might act as osmotica, enhancing plant survival during water stress. This will be tested for Australian native and non-native hyperaccumulator plants. The study will clarify our understanding of the evolutionary significance of hyperaccumulation, and has important applications for extracting metals from contaminated soils.Read moreRead less
Female multiple mating and the evolutionary origins of complex societies. This project plans to connect micro-evolutionary processes with macro-evolutionary change to provide a unified understanding of why animals live together. Evolutionary transitions to and from complex social behaviour appear linked to female multiple mating (polyandry). However, the causal pathway by which variation in polyandry results in the emergence and diversification of sociality is yet to be established. Using a vert ....Female multiple mating and the evolutionary origins of complex societies. This project plans to connect micro-evolutionary processes with macro-evolutionary change to provide a unified understanding of why animals live together. Evolutionary transitions to and from complex social behaviour appear linked to female multiple mating (polyandry). However, the causal pathway by which variation in polyandry results in the emergence and diversification of sociality is yet to be established. Using a vertebrate system we aim to integrate empirical, theoretical and comparative approaches to show: the ecological causes of individual variation in female polyandry; its effect on social behaviours that promote social complexity at the population level; and how this corresponds to divergence in social complexity across species.Read moreRead less
Population divergence and the thermal ecology of sexual conflict. This project aims to test how populations of introduced mosquitofish have adapted to local differences in water temperature (such as Tasmania versus Queensland). To what extent has natural selection (for survival) and sexual selection (the ability of males to acquire mates and/or females to resist unwanted matings) driven the local adaptation of populations? Many species have traits that evolve under intense sexual conflict – nota ....Population divergence and the thermal ecology of sexual conflict. This project aims to test how populations of introduced mosquitofish have adapted to local differences in water temperature (such as Tasmania versus Queensland). To what extent has natural selection (for survival) and sexual selection (the ability of males to acquire mates and/or females to resist unwanted matings) driven the local adaptation of populations? Many species have traits that evolve under intense sexual conflict – notably when males harass or coerce females into mating and females resist these attempts. It is assumed that sexual conflict traits are rarely affected by the local environment. The project will test the hypothesis that temperature can actually drive the evolution of such traits, specifically coercion and resistance to mating.Read moreRead less
The renaissance predator: complex predator-prey interactions and vertebrate diversity in arid Australia. This project will greatly increase understanding of how predators influence the ecology and diversity of their prey in Australia's deserts, and thus improve our ability to conserve and manage our iconic but fragile inland landscapes. It will increase awareness locally about the richness of desert life and stimulate national and international interest by contributing to emerging debate about h ....The renaissance predator: complex predator-prey interactions and vertebrate diversity in arid Australia. This project will greatly increase understanding of how predators influence the ecology and diversity of their prey in Australia's deserts, and thus improve our ability to conserve and manage our iconic but fragile inland landscapes. It will increase awareness locally about the richness of desert life and stimulate national and international interest by contributing to emerging debate about how predators influence diversity. It will also establish an unparalleled 24-year time series of ecological data, and thus provide a key resource to chart the biological effects of climate change and assist sustainable management of biodiversity across the continent's vast interior. Read moreRead less