Sulfur cycling in soil environments - how bacteria contribute to the oxidation of organic and inorganic sulfur compounds. Element cycling in soil environments is of global significance as soils constantly exchange compounds with the atmosphere and cover vast areas of land. Many of the compounds exchanged are known contributors to the greenhouse effect and other phenomena such as acid rain. By elucidating the regulation of bacterial sulfur oxidation pathways and their integration into general met ....Sulfur cycling in soil environments - how bacteria contribute to the oxidation of organic and inorganic sulfur compounds. Element cycling in soil environments is of global significance as soils constantly exchange compounds with the atmosphere and cover vast areas of land. Many of the compounds exchanged are known contributors to the greenhouse effect and other phenomena such as acid rain. By elucidating the regulation of bacterial sulfur oxidation pathways and their integration into general metabolism, we will enable the development of better management strategies for agricultural soils. Our data will also significantly improve understanding of how soil processes will change in response to changing climatic conditions.Read moreRead less
Sea Snake Diversification: Why Are Certain Taxa And Regions Species-Rich? By generating new knowledge of ecologically and medically important Australasian organisms, this project will benefit biodiversity management, snakebite therapy and pharmaceutical research. Sea snakes reach peak diversity in the Indo-Australian hotspot and are threatened by habitat degradation, fisheries bycatch and rising sea temperatures. Sea snake conservation and marine reserve management strategies will directly ben ....Sea Snake Diversification: Why Are Certain Taxa And Regions Species-Rich? By generating new knowledge of ecologically and medically important Australasian organisms, this project will benefit biodiversity management, snakebite therapy and pharmaceutical research. Sea snakes reach peak diversity in the Indo-Australian hotspot and are threatened by habitat degradation, fisheries bycatch and rising sea temperatures. Sea snake conservation and marine reserve management strategies will directly benefit from a better understanding of local endemism, species boundaries and possible cryptic species. Sea snakes are highly venomous and pose a significant health risk in fishing communities; venom variation has a strong phylogenetic component and is of vital importance in antivenom preparation and bioprospecting. Read moreRead less
Mechanisms of plant species co-existence in species-rich ecosystems: testing hypotheses using spatially-explicit field data and computer models. A generally accepted explanation for the co-existence of species in high diversity communities is one of the outstanding unresolved issues in ecology. Current hypotheses fail to satisfy in their generality; spatial implications are inadequately explored empirically, and the hypotheses are not testable within a common framework. Advances in spatial analy ....Mechanisms of plant species co-existence in species-rich ecosystems: testing hypotheses using spatially-explicit field data and computer models. A generally accepted explanation for the co-existence of species in high diversity communities is one of the outstanding unresolved issues in ecology. Current hypotheses fail to satisfy in their generality; spatial implications are inadequately explored empirically, and the hypotheses are not testable within a common framework. Advances in spatial analysis and complex system modelling now make the search for a general explanation feasible. This project will parameterise and test the different co-existence hypotheses using spatial statistics, empirical/experimental studies of dispersal, recruitment, competition and herbivory, and spatially-explicit computer simulation models of community assemblage in species-rich Australian shrubland communities.Read moreRead less
Coral Reefs Sensing Our Changing Climate. Australia's Great Barrier Reef is a valuable national and community resource, supporting commercial and recreation fishing and extensive national and international tourism along the length of Queenslands coastline. However it is an environment that is under threat from changing climate. The impact of a degraded reef environment is broad reaching, with effects on the Australian and Queensland economy and way of life. A better understanding of how this va ....Coral Reefs Sensing Our Changing Climate. Australia's Great Barrier Reef is a valuable national and community resource, supporting commercial and recreation fishing and extensive national and international tourism along the length of Queenslands coastline. However it is an environment that is under threat from changing climate. The impact of a degraded reef environment is broad reaching, with effects on the Australian and Queensland economy and way of life. A better understanding of how this valuable environment will respond to its changing environment is imperative and will provide us with a more informed basis on which to predict its future sustainability. Read moreRead less
The role of natural selection in macroevolution: a case study examining convergence of form and function in marine predator guilds. Darwin's theory of evolution natural selection is one of the most successful in the history of science and provides the framework for modern biology: however, areas of debate or uncertainty are often misinterpreted by non-scientists as indication of fundamental flaws in the theory. New 'hi-tech' tools provide the opportunity to re-examine these areas, and also to de ....The role of natural selection in macroevolution: a case study examining convergence of form and function in marine predator guilds. Darwin's theory of evolution natural selection is one of the most successful in the history of science and provides the framework for modern biology: however, areas of debate or uncertainty are often misinterpreted by non-scientists as indication of fundamental flaws in the theory. New 'hi-tech' tools provide the opportunity to re-examine these areas, and also to demonstrate the process of science to the public. The new tool is Computational Biomechanics, the future of studying biological form, and this project will further develop the leading role of Australian research in this technology which has applications for palaeontology, environmental management, medical science, and the next generation of engineering using 'biomaterials'.Read moreRead less
Novel Chlorophylls and New Directions in Photosynthesis. Understanding how solar energy is used in photosynthesis is of global importance and will contribute to cutting-edge photosynthetic research by Australian scientists. We aim to discover how and why the key photosynthetic pigments, chlorophylls, are synthesised and used; this will provide new opportunities for breakthroughs in frontier technologies, such as photoelectric cells based on carbon rather than silicon. We aim to understand how no ....Novel Chlorophylls and New Directions in Photosynthesis. Understanding how solar energy is used in photosynthesis is of global importance and will contribute to cutting-edge photosynthetic research by Australian scientists. We aim to discover how and why the key photosynthetic pigments, chlorophylls, are synthesised and used; this will provide new opportunities for breakthroughs in frontier technologies, such as photoelectric cells based on carbon rather than silicon. We aim to understand how novel chlorophylls are used in a variety of important organisms in a range of ecological niches. The results will aid understanding of the effects of global climate change on coral reefs, in open-ocean systems and in other important biological communities.Read moreRead less
Molecular mechanisms of spectral extension in photosynthesis: the substitution and formation of the novel pigment chlorophyll d. This project builds on new discoveries of novel chlorophylls and how their spectral properties are fine-tuned in photosynthetic bacteria. We will focus on how key photopigments, the chlorophylls, are biosynthesised, including their enzyme structures, mechanisms and regulatory elements. Understanding the power of natural selection on spectral extension in photosynthesis ....Molecular mechanisms of spectral extension in photosynthesis: the substitution and formation of the novel pigment chlorophyll d. This project builds on new discoveries of novel chlorophylls and how their spectral properties are fine-tuned in photosynthetic bacteria. We will focus on how key photopigments, the chlorophylls, are biosynthesised, including their enzyme structures, mechanisms and regulatory elements. Understanding the power of natural selection on spectral extension in photosynthesis will shed light on the evolutionary development of photopigments, and will allow us explore the possibilities for the production of new pigments in solar energy research.Read moreRead less
Analysing the roles of cospeciation and host-shifting in the evolution of behaviour and ecology of thrips associated with Australian Acacia. The relationships and interactions between phytophagous thrips and their host Acacia species provide a system well suited to investigating mechanisms of macroevolution in the Australian arid-zone biota. In this project we will determine the relative importance of mechanisms such as cospeciation and host-shifting within this model system, and examine the in ....Analysing the roles of cospeciation and host-shifting in the evolution of behaviour and ecology of thrips associated with Australian Acacia. The relationships and interactions between phytophagous thrips and their host Acacia species provide a system well suited to investigating mechanisms of macroevolution in the Australian arid-zone biota. In this project we will determine the relative importance of mechanisms such as cospeciation and host-shifting within this model system, and examine the influence of these mechanisms on the evolution of both the insects and the host-plants. It is expected that the results of this study will provide insights into the evolution of arid-zone biodiversity in Australia and the nature of insect/host-plant interactions.Read moreRead less
Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raise ....Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raises the question whether the VLP1 gene locus is genetically associated with the phenotype. We will investigate the genetic basis for the observed phenotypic differences, by comparing the two thelytokous lines with the corresponding homozygous VLP1-genotypes in sexual strains. The outcome will provide a molecular and genetic framework to test parthenogenetic reproduction strategies in some insect species.Read moreRead less
Form, Function and Fitness: Multidisciplinary Evolutionary Biology Using Lizards as Models. What explains variation in reproductive success and its evolutionary consequences, within and among populations and species? Addressing this fundamental question in evolutionary biology requires a multidisciplinary approach, integrating ecology, genetics, behaviour and biochemistry. Using lizards as models, I will test (i) the degree to which variation in male signals reflects differences in immunogenotyp ....Form, Function and Fitness: Multidisciplinary Evolutionary Biology Using Lizards as Models. What explains variation in reproductive success and its evolutionary consequences, within and among populations and species? Addressing this fundamental question in evolutionary biology requires a multidisciplinary approach, integrating ecology, genetics, behaviour and biochemistry. Using lizards as models, I will test (i) the degree to which variation in male signals reflects differences in immunogenotype and stress tolerance, (ii) the degree to which paternity is determined by male genes, or male-female genetic similarity, (iii) whether offspring survival depends mostly on genes or on maternal investments, and (iv) how the relative importance of these factors vary among populations and species.Read moreRead less