Summary
Adam Lindholm, a postgraduate student at Oxford, explores the intriguing history of Australia's megafauna and the scarcity of large mammalian carnivores on the continent. He highlights the unique case of the marsupial lion, Thylacoleo, and the Tasmanian devil, both of which faced significant challenges in their survival. Lindholm's research focuses on understanding body size and the fossil record of terrestrial vertebrates, aiming to uncover biases that obscure the true picture of past ecosystems.
Lindholm's interest in Australian megafauna is fueled by a rich fossil record, particularly from sites like Lake Calabona and various caves across Australia. He discusses the competition for meat among large predators in the Miocene of South America, noting that reptiles dominated the predatory landscape due to low competition levels. This observation leads him to consider similar dynamics in Australia, where he posits that reptiles may have been better suited to the continent's arid conditions, potentially outcompeting marsupials.
The arrival of dingoes in Australia around 4,000 years ago presents another area of interest for Lindholm. He plans to investigate how dingoes impacted the existing predator community, particularly the Tasmanian tiger and devil, which disappeared around the same time. His research aims to shed light on whether these extinctions resulted from direct hunting or competition with the newly introduced dingoes, further contributing to the understanding of Australia's complex ecological history.
Show Notes
Why did reptiles prevail for so long and why did mammals take so long to become dominant predators? Adam Lindholm is looking at body size, availability of prey and environmental conditions to reconsider our understanding of the history of reptiles and mammals.
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