Featured Research

from universities, journals, and other organizations

Lessons Learned From Drought Deaths 40,000 Years Ago

Date:
November 29, 2006
Source:
Queensland University of Technology
Summary:
Drought-stricken Australia should heed a warning from a new study that shows a series of massive droughts killed giant kangaroos and other "megafauna" in south-east Queensland 40,000 years ago, according to researchers from the Queensland University of Technology.

Dr. Gilbert Price at the Darling Downs excavation site.
Credit: Image courtesy of Queensland University of Technology

Drought-stricken Australia should heed a warning from a new study that shows a series of massive droughts killed giant kangaroos and other "megafauna" in south-east Queensland 40,000 years ago, according to researchers from the Queensland University of Technology.

Related Articles


Scientists Dr Gilbert Price and Dr Gregory Webb believe understanding how the prehistoric big dry caused extinctions could help predict how and if animals battling current climate change will survive.

The QUT research into the giant Australian marsupials and reptiles and the impact of climate change will be published in the December issue of the Australian Journal of Earth Sciences.

Dr Price and Dr Webb studied the fossil-rich Darling Downs area of south-east Queensland with the help of palaeontologists from the Queensland Museum and an amateur local fossil hunter, Ian Sobbe.

Dr Price said what the team unearthed showed that giant kangaroos and other large wildlife that roamed the area in the late Pleistocene age were drought-stressed when they died.

"What makes this research so relevant to climate change theories today is that the profile of the fossil kangaroo populations is identical to that of a modern drought-stressed kangaroo mob," he said.

"It provides, for the first time, evidence which suggests that the megafauna kangaroos were greatly affected by a series of catastrophic droughts.

"These animals of the prehistoric Australian bush were the largest of their time and included gigantic wombats the size of cars, kangaroos that reached almost 2.5 metres tall, and massive emus and goannas.

"There's nothing we can do now to save these animals - they're all extinct.

"But if we can understand how those animals responded to the massive droughts and climate change events of the past, we might be able to go some way in predicting the effects of future climate changes and its impact on the way that we manage and conserve the precious habitats and wildlife of the Australian bush."

Dr Price said the layers of fossils in the dig area at the Darling Downs were not consistent with some theories that humans had wiped out megafauna.

"Some scientists believe in the 'blitzkrieg' megafauna extinction hypothesis which blames humans for over-hunting these giant marsupials," he said.

"If that was the case, these fossils dating back thousands of years would show the animals dying out at the same point in time. But they don't. These layers of fossils buried at a single site under the Darling Downs show a progressive, three-stage extinction over time that relates to periods of climate change."

Dr Webb said the research had unearthed indicators that the Darling Downs had been a semi-arid environment 40,000 years ago, rather than sub-tropical or tropical.

"Sedimentological information shows that the Darling Downs was experiencing repeating cycles of wet and dry conditions, resulting in droughts and periodic flash flooding from storms, during the time when the megafauna populations were declining," he said.

"The research found no evidence of humans being involved in the accumulation of fossils in the catchment at the time of deposition, but is perfectly consistent with their decline being caused by increasing aridity.

"So it's most likely that Australia's giant kangaroos and other megafauna in this area were driven to extinction by the hands of Mother Nature."

Dr Price, who received his PhD this year for his research, and Dr Webb are both researchers with QUT's School of Natural Resource Sciences and QUT's Institute of Sustainable Resources.


Story Source:

The above story is based on materials provided by Queensland University of Technology. Note: Materials may be edited for content and length.


Cite This Page:

Queensland University of Technology. "Lessons Learned From Drought Deaths 40,000 Years Ago." ScienceDaily. ScienceDaily, 29 November 2006. <www.sciencedaily.com/releases/2006/11/061128093019.htm>.
Queensland University of Technology. (2006, November 29). Lessons Learned From Drought Deaths 40,000 Years Ago. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2006/11/061128093019.htm
Queensland University of Technology. "Lessons Learned From Drought Deaths 40,000 Years Ago." ScienceDaily. www.sciencedaily.com/releases/2006/11/061128093019.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Fossils & Ruins News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
3D Map of Antarctic Sea Ice to Shed Light on Climate Change

3D Map of Antarctic Sea Ice to Shed Light on Climate Change

Reuters - Innovations Video Online (Nov. 24, 2014) A multinational group of scientists have released the first ever detailed, high-resolution 3-D maps of Antarctic sea ice. Using an underwater robot equipped with sonar, the researchers mapped the underside of a massive area of sea ice to gauge the impact of climate change. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Ruins Thought To Be Port Actually Buried Greek City

Ruins Thought To Be Port Actually Buried Greek City

Newsy (Nov. 24, 2014) Media is calling it an "underwater Pompeii." Researchers have found ruins off the coast of Delos. Video provided by Newsy
Powered by NewsLook.com
Amphipolis Tomb Architraves Reveal Faces

Amphipolis Tomb Architraves Reveal Faces

AFP (Nov. 22, 2014) Faces in an area of mosaics is the latest find by archaeologists at a recently discovered tomb dating back to fourth century BC and the time of Alexander the Great in Greece. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins