Navigation Links
Terrestrial biodiversity recovered faster after Permo-Triassic extinction than previously believed
Date:10/9/2011

KINGSTON, R.I. -- October 10, 2011 -- While the cause of the mass extinction that occurred between the Permian and Triassic periods is still uncertain, two University of Rhode Island researchers collected data that show that terrestrial biodiversity recovered much faster than previously thought, potentially contradicting several theories for the cause of the extinction.

David Fastovsky, URI professor of geosciences, and graduate student David Tarailo found that terrestrial biodiversity recovered in about 5 million years, compared to the 15- to 30-million year recovery period that earlier studies had estimated. The recovery period in the marine environment is believed to have taken 4 to 10 million years, about twice as long as the recovery period after most other mass extinctions.

The results of their research were presented today at the annual meeting of The Geological Society of America in Minneapolis.

"Our results suggest that the cause of the extinction didn't spill over as severely into the terrestrial realm as others have claimed," said Fastovsky. "There was still a terrestrial extinction, but its repercussions weren't more long term than those in the marine realm, and possibly less."

Since the URI study suggests that the terrestrial realm recovered at least as fast as the marine realm, it rules out those theories stating that the extinction, which took place about 251 million years ago, was caused by global events affecting both the marine and terrestrial environments equally.

The researchers compiled fossil faunal lists from the Moenkopi Formation in northeastern Arizona, which contains fossil vertebrates from the Middle Triassic, and compared them to faunas from the nearby Chinle Formation, containing Late Triassic fauna.

According to Tarailo and Fastovsky, if it took 30 million years for the terrestrial fauna to recover, then the older formation should have lower diversity than the younger one, because it would still be compromised by the conditions that caused the extinction. But they found the diversity to be comparable, meaning that the diversity recovered more rapidly than that.

"Some may argue that our results are just one data point in North America, but if North America is representative of the rest of the world, then our results apply to the entire world," Fastovsky said.

The researchers' next step is to expand their analysis to other fossil deposits around the world using the same techniques to test their results.
'/>"/>

Contact: Todd McLeish
tmcleish@uri.edu
401-874-7892
University of Rhode Island
Source:Eurekalert

Related biology news :

1. A tiny frozen microbe may hold clues to extraterrestrial life
2. Extraterrestrial platinum was stirred into the Earth
3. Breath of the Earth: Cycling carbon through terrestrial ecosystems
4. Oklahoma researchers support biodiversity in biofuels production
5. Minnesota ecology professor wins international award for biodiversity and biofuels research
6. Smithsonian perspective: Biodiversity in a warmer world
7. DFG continues to strengthen biodiversity research
8. European biodiversity and ecosystem scientists merge and gear up for long-term research
9. Study confirms amphibians ability to predict changes in biodiversity
10. Marine invasive species advance 50km per decade, World Conference on Marine Biodiversity told
11. Marine invasive species advance 50 km per decade, World Conference on Marine Biodiversity told
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2017)... Janice Kephart , former 9/11 ... Partners, LLP (IdSP) , today issues the following ... March 6, 2017 Executive Order: Protecting the ... be instilled with greater confidence, enabling the reactivation ... applications are suspended by until at least July ...
(Date:4/19/2017)... 19, 2017 The global military ... is marked by the presence of several large global ... by five major players - 3M Cogent, NEC Corporation, ... for nearly 61% of the global military biometric market ... the global military biometrics market boast global presence, which ...
(Date:4/18/2017)... SUNNYVALE, Calif. , April 18, 2017  Socionext Inc., a ... prototype of a media edge server, the M820, which features the ... face recognition software provided by Tera Probe, Inc., will be showcased ... and at the NAB show at the Las Vegas ... ...
Breaking Biology News(10 mins):
(Date:4/25/2017)... ... 2017 , ... Dr. Robert G. Schwartz, the principal of ... that acclaimed physiatrist Matthew Terzella, MD, has joined the practice as a partner, ... completed his residency in Physical Medicine and Rehabilitation at UMDNJ-Robert Wood Johnson and ...
(Date:4/25/2017)... ... April 25, 2017 , ... ... , Covalent’s Analytical Services unit provides high-quality data to clients, both ... 24 hours of receipt. There are no price premiums, and customers are welcome ...
(Date:4/25/2017)... ... ... Leaders of Quorum Review IRB and Kinetiq , the ... week’s Association of Clinical Research Professionals (ACRP) 2017 Meeting & Expo with ... are excited to present subject matter expertise on topics that impact the global clinical ...
(Date:4/24/2017)... ... April 24, 2017 , ... ... in a cellular milieu; however, the broad application of this cellular target engagement ... with sensitive quantitative readouts. Cell-based thermal stabilization assays are valuable methods for particular ...
Breaking Biology Technology: