³ÉÈË´óƬ

The recent shocking sequence of bushfires across the southern and eastern coast of Australia has surprised all of us.

Locally, in South Australia, we have experienced some extremely challenging times. The impacts of these fires will be felt for decades to come and the response to them will be complex. I have been involved in some aspects of these responses and many ³ÉÈË´óƬ staff have relevant expertise to assist with the recovery process.

The Cudlee Creek fire was large and intense, impacting on many people’s lives and livelihoods. When homes are destroyed and iconic sites are inflicted with high-level damage, people’s lives are heavily disrupted. This affirms the significance of these events and how critical it is that we work to control the occurrence and impact of similar events in the future.

The real shock of the summer for me was the Kangaroo Island fires. At present, we know that more than 200,000 hectares of Kangaroo Island was burnt, nearly half the island’s total land area and that includes some world-famous wilderness areas. In the process, countless thousands of animals have perished, and that is just the vertebrates, there will be no way of accurately estimating the total damage to invertebrate species.

As a botanist, the shock of this fire was its intensity and coverage. I have spent my career working on the long-term evolution of the Australian vegetation and a critical part of that evolution has been the way species have adapted to the relatively high natural fire frequencies over much of our country. Those adaptations are highly varied, and they have worked well for tens of millions of years. But now they are failing. Why? Because these fires are, in places, so intense that the species adaptations fail. 

• How can a soil-stored seed bank germinate after a fire if the temperature was so high that the seeds have been destroyed?
• How do eucalypts recover vegetatively from protected buds on stems or underground lignotubers (massive woody structures that protect thousands of dormant buds) when the stems have been totally destroyed and the lignotubers are smouldering embers long after the fire has passed? 
• How does a Banksia cone release its seed into the soil after the fire passes when the cone has been totally incinerated?