Human activity did not wipe out megafauna: latest study
August 13th, 2008 - 11:12 am ICT by IANS
Sydney, Aug 13 (IANS) A new study that said the first human settlers in Australia wiped out its megafauna has been contracted by a newer study. The latest study says there is no evidence to indicate that human activity wiped out more than 60 species of Australia’s large prehistoric animals or megafauna, between 40,000 and 50,000 years ago. A review of available evidence showed that only 13 species were still alive when humans first arrived in Australia. Those people did not focus on big-game hunting nor cause major habitat change by widespread use of fire.
The review countered claims that the so-called mass extinction took place about 46,400 years ago, which coincides with estimates of first human colonisation of the continent, said Judith Field of University of Sydney and Steve Wroe of University of New South Wales.
They noted that considerable evidence exists to suggest that in some parts of the continent, people and some species may have co-existed for some thousands of years.
“Over 60 animal species disappeared from the Australian continent during that time, mostly large to gigantic marsupials, birds and reptiles,” they noted.
The 13 species that were around the time of human arrival included a giant flightless bird called Genyornis newtoni, a three-tonne marsupial browser called Diprotodon optatum and a number of short-faced and heavily built kangaroos and giant wallabies. At least two species of crocodiles and one giant goanna called Megalania also disappeared.
“The elimination of the purported ‘extinction window’ opens up the debate to the possibility that other large-scale processes may have been important factors in the extinction process,” said Wroe.
“Any claim for a human role on the extinction process must demonstrate, at the minimum, an association of humans and these now extinct animals. Only one site on the continent can do that - Cuddie Springs in northern New South Wales. Nowhere else has this association been found.”
These findings were published in the journal Earth Sciences Review.
- Early humans, not climate change, may have wiped out Australia's giant animals - Jan 25, 2010
- Humans, not climate, sounded death knell of giants - Jan 25, 2010
- Australia's megafauna may have gone extinct due to humans 40,000 years ago - Jan 22, 2010
- Humans 'responsible for megafauna demise' - Nov 30, 2010
- Humans drove giant turtle to extinction - Aug 17, 2010
- Humans 'drove ancient turtles to extinction' - Aug 17, 2010
- Humans may have been responsible for "megafauna" demise 46,000 years ago - Jun 23, 2009
- Humans, climate changed wiped out Ice Age mammals - Nov 06, 2011
- Wombat fossil unearthed in Australia - Jul 07, 2011
- New evidence blames humans for mass extinction of Tasmanias prehistoric animals - Aug 12, 2008
- Scientists warn that one-fifth of the species are going to slide to extinction - Oct 27, 2010
- Komodo Dragon most likely evolved in Australia 3-4 mln yrs ago - Sep 30, 2009
- Fossils of giant bird discovered on 'hobbit' island of Flores - Dec 08, 2010
- Our ancestors sounded death knell of prehistoric animals - Aug 12, 2008
- Cave painting in Australia depicts extinct marsupial lion - May 11, 2009
Tags: animal species, australian continent, crocodiles, cuddie springs, diprotodon optatum, extinct animals, game hunting, goanna, habitat change, human colonisation, human settlers, judith field, mass extinction, new south wales, prehistoric animals, scale processes, steve wroe, university of new south wales, university of sydney, wallabies