The declining diversity of our biological systems has been an on-going feature of human history. As we have developed ever more ingenious and efficient technologies to harness and exploit the natural world, so our impact on nature’s bounty has been crushing. One of the most emblematic examples of this process for me was reading Mark Kurlansky’s marvellous history Cod: A Biography of the Fish That Changed the World. Once a bountiful species (so great in number that John Cabot famously proclaimed in the 1490s that men could walk across the backs of cod on the Grand Banks), Atlantic cod were by the 1990s decimated through the introduction of industrial fishing techniques. Indeed, recent human history is littered with similar examples of species decline and extinction as a result of our industry. Reading Elizabeth Kolbert’s recent book The Sixth Extinction, one of the most tragic is the story of the last great auk; powerful flightless birds that were hunted to extinction in the nineteenth century; the last breeding couple killed in an island off Iceland one June evening in 1844.
Humans are having an extraordinary impact on the life of the planet with species extinction rates now 100-1000 times the background rate. From a largely local phenomenon of habitat-loss and over-exploitation, biodiversity decline has now become systemic, driven by our increasingly globalized economy, expanding consumerism and accelerating climatic change. Indeed, many scientists believe we are in the midst of the sixth mass extinction event in the Earth’s history, and that the impacts on biodiversity, our life support system, will accelerate over the next century.
On October 7th, the Sydney Environment Institute (SEI) and the Balanced Enterprise Research Network (BERN) at the University of Sydney will be organizing a Sydney Ideas public lecture delivered by two of the country’s leading researchers on biodiversity decline from environmental and economic perspectives.
Professor Lesley Hughes from the Department of Biological Sciences at Macquarie University and the Climate Council will pose the question ‘Can Biodiversity Survive the Human Race?’. In her talk she will explore how we let things get this bad, whether we still have a chance to save the Earth, and what we can all do to avert catastrophe.
Our second speaker, Manfred Lenzen, Professor of Sustainability Research at the University of Sydney, will explore how globalization and international trade are key drivers of biodiversity decline. He will outline his research which charts how demand for consumer commodities in developed economies drives species extinction in developing countries.
Details for this exciting event can be found here.