Antarctic marine diatoms: Key to predicting the effects of global climate change on a temperature-sensitive ecosystem. This project aims to determine the effects of global climate change on Antarctic diatoms. Diatoms are a major component of the polar phytoplankton. They are sensitive to changes in their marine environment, detection of which is an essential part of the Antarctic climate change strategy. Understanding the environmental processes that cause natural variation in extant diatoms ....Antarctic marine diatoms: Key to predicting the effects of global climate change on a temperature-sensitive ecosystem. This project aims to determine the effects of global climate change on Antarctic diatoms. Diatoms are a major component of the polar phytoplankton. They are sensitive to changes in their marine environment, detection of which is an essential part of the Antarctic climate change strategy. Understanding the environmental processes that cause natural variation in extant diatoms will make it possible to reconstruct the response of fossil diatoms, preserved in marine sediments, to past climate change. This understanding is vital for predicting the effect of future anthropogenic warming on this ecosystem.Read moreRead less
Drying and dying in Australia: extraordinary creatures and climate change 15 million years ago. Australia's globally distinctive mammals were confronted 15 million years ago by a climate plunge from lush greenhouse to dry icehouse conditions. In northern Queensland, in the World Heritage-listed cave known as AL90, fossil-rich deposits span this interval of change. Entombed are dozens of extraordinarily well-preserved skulls and articulated skeletons including a growth series from pouch-young to ....Drying and dying in Australia: extraordinary creatures and climate change 15 million years ago. Australia's globally distinctive mammals were confronted 15 million years ago by a climate plunge from lush greenhouse to dry icehouse conditions. In northern Queensland, in the World Heritage-listed cave known as AL90, fossil-rich deposits span this interval of change. Entombed are dozens of extraordinarily well-preserved skulls and articulated skeletons including a growth series from pouch-young to adults of a rare, possibly sloth-like marsupial as well as more familiar kangaroos, thylacines and bats. Our fossil research will help align Australian records of biotic change with global palaeoclimatic events and provide a benchmark for measuring the nature and rate of environmental and biotic change that continues to transform our nation.Read moreRead less
Overturning the Ediacara biota: community structure of the oldest animal ecosystems. The first systematic excavation of serial fossil beds of South Australia's famous Ediacara biota will lead to an integrated study of the oldest diverse macroscopic assemblages of life on Earth. Once the preservational and biological components of the record have been separated, Ediacaran fossil beds can be treated as 'snap-shots? of benthic marine communities. This will enable the use of palaeoecological tools t ....Overturning the Ediacara biota: community structure of the oldest animal ecosystems. The first systematic excavation of serial fossil beds of South Australia's famous Ediacara biota will lead to an integrated study of the oldest diverse macroscopic assemblages of life on Earth. Once the preservational and biological components of the record have been separated, Ediacaran fossil beds can be treated as 'snap-shots? of benthic marine communities. This will enable the use of palaeoecological tools to determine which if any of these Precambrian fossils were members of animal groups that heralded the Cambrian explosion of animal life.Read moreRead less
Australia's mammalian carnivore diversity in space and time. To more effectively address the current extinction crisis we need to understand past diversity. This research program will comprehensively investigate the diversity of mammalian carnivores on three continents over geological time. Results will provide insight into whether the evolution of Australia's mammal carnivores differs fundamentally from those of other continents, as has often been suggested but not quantitatively demonstrated. ....Australia's mammalian carnivore diversity in space and time. To more effectively address the current extinction crisis we need to understand past diversity. This research program will comprehensively investigate the diversity of mammalian carnivores on three continents over geological time. Results will provide insight into whether the evolution of Australia's mammal carnivores differs fundamentally from those of other continents, as has often been suggested but not quantitatively demonstrated. Studies focused in the present are important, but often miss critical factors that can only be clarified through analyses with deep time perspectives. The findings will translate into an improved understanding of what makes Australia unique and better-informed decisions regarding wildlife management.Read moreRead less
Evolutionary dynamics in deep time: faunal turnover during the Ediacaran. This project aims to investigate the world’s oldest faunal succession in the fossil record by determining the presence and extent of a sedimentary gap and confirming the role of time in the control of fossil distribution. Significant breakthroughs and capacity building are expected in the areas of palaeontology, evolutionary biology and geology using a hitherto unrecognised hiatus in the rock succession. Project outcomes i ....Evolutionary dynamics in deep time: faunal turnover during the Ediacaran. This project aims to investigate the world’s oldest faunal succession in the fossil record by determining the presence and extent of a sedimentary gap and confirming the role of time in the control of fossil distribution. Significant breakthroughs and capacity building are expected in the areas of palaeontology, evolutionary biology and geology using a hitherto unrecognised hiatus in the rock succession. Project outcomes include enhanced understanding of the first animal communities on Earth – these should provide significant benefits, such as revealing Australia's unique record of oldest complex organisms, while bringing additional tourism to the region, and increasing the strength of the Flinders Ranges UNESCO World Heritage nomination.Read moreRead less
Size matters: evolution of body size of species in deep time. Global warming is predicted to form 'sick seas' and cause widespread stunted growth of taxa and ecosystem-wide dwarfism. Exactly how this works requires substantiation of both short-term empirical and experimental research as well as evidence from the deep-time fossil record. Using the high-resolution marine fossil record from the Permian-Triassic mass extinction ~252 million years ago, the most severe in the history of animals, this ....Size matters: evolution of body size of species in deep time. Global warming is predicted to form 'sick seas' and cause widespread stunted growth of taxa and ecosystem-wide dwarfism. Exactly how this works requires substantiation of both short-term empirical and experimental research as well as evidence from the deep-time fossil record. Using the high-resolution marine fossil record from the Permian-Triassic mass extinction ~252 million years ago, the most severe in the history of animals, this project will investigate how body size of marine species and communities evolved in response to the mass extinction and rapid global warming. It is expected that the project findings will help better understand the links between global warming, anoxia, hypercapnia, euxinia, ocean acidification, and species adaptation and evolution.Read moreRead less
Extricating extinction histories at Lake Callabonna’s megafauna necropolis. This project aims to determine the nature, timing and causes of megafaunal extinction in arid Australia using an extensive fossil necropolis at Lake Callabonna. An approach combining geochronology, morphology and histology studies will be used to generate novel understanding of both the life and death of Australia’s most iconic megafaunal species. Expected outcomes of the project include generating critical new insights ....Extricating extinction histories at Lake Callabonna’s megafauna necropolis. This project aims to determine the nature, timing and causes of megafaunal extinction in arid Australia using an extensive fossil necropolis at Lake Callabonna. An approach combining geochronology, morphology and histology studies will be used to generate novel understanding of both the life and death of Australia’s most iconic megafaunal species. Expected outcomes of the project include generating critical new insights into the globally significant megafauna extinction debate, and enhancing institutional and international collaborations in palaeoecological research. By providing a deep time perspective on Australia’s extinction dynamics, this project will benefit future conservation management strategies.Read moreRead less
Island fauna evolution through deep time: the Flores experiment. This project aims to reveal the evolutionary patterns of insular fauna, including hominins, as exemplified by the island of Flores. Through multidisciplinary analyses of securely dated fossils, artefacts and environmental data spanning 1.4 million years, the project expects to provide a deep and broad reconstruction of faunal adaptations to insular conditions and environmental fluctuations through deep geological time. The signific ....Island fauna evolution through deep time: the Flores experiment. This project aims to reveal the evolutionary patterns of insular fauna, including hominins, as exemplified by the island of Flores. Through multidisciplinary analyses of securely dated fossils, artefacts and environmental data spanning 1.4 million years, the project expects to provide a deep and broad reconstruction of faunal adaptations to insular conditions and environmental fluctuations through deep geological time. The significance of this research includes the first comprehensive testing of hypotheses associated with island dwarfing (where megafauna, over time, become smaller), and providing the first palaeo-ecological context for the only known insular hominin, Homo floresiensis.Read moreRead less