Navigation Links
The winners of mass extinction: With predators gone, prey thrives
Date:5/3/2011

In modern ecology, the removal or addition of a predator to an ecosystem can produce dramatic changes in the population of prey species. For the first time, scientists have observed the same dynamics in the fossil record, thanks to a mass extinction that decimated ocean life 360 million years ago.

What was bad for fish was good for the fish's food, according to a paper published today in Proceedings of the National Academy of Sciences. Researchers from the University of Chicago, West Virginia University, and The Ohio State University find that the mass extinction known as the Hangenberg event produced a "natural experiment" in the fossil record with results that mirror modern observations about predator-prey relationships.

"This is the first time that specific, long-term predator-prey interactions have been seen in the fossil record," said Lauren Sallan, graduate student in the Department of Organismal Biology and Anatomy at the University of Chicago and lead author. "It tells us a lot about the recovery from mass extinctions, especially mass extinctions that involved a loss of predators."

Paleontologists know the Devonian Period, which spanned from 416 to 359 million years ago, as the Age of Fishes, a time of astonishing diversity for marine vertebrate species. That thriving world was devastated by the Hangenberg event, a mass extinction of unknown origin that set the stage for modern biodiversity.

But some species survived the carnage of the Hangenberg event. The next 15 million years in the fossil record are dominated by crinoids, species similar to modern sea lilies and related to starfish. So abundant and diverse were these marine animals that the period is known as the Age of the Crinoids; entire limestone deposits from the era are made up of crinoid fossils.

"We've been puzzled for many years as to why there were so many species and specimens of crinoids," said study co-author Thomas Kammer, PhD, Eb
'/>"/>

Contact: Robert Mitchum
robert.mitchum@uchospitals.edu
773-795-5227
University of Chicago Medical Center
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. ASPO announces 2011 award winners in pediatric otolaryngology research
2. Biophysical Society announces 2011 Student Research Achievement award winners
3. Evolutionary winners and losers revealed in collaborative study
4. Winners to share $1 million prize in Office of Naval Research challenge
5. Filmmakers Joel and Ethan Coen among 2011 Dan David Prize winners
6. Joshua E. Neimark Memorial Travel Assistance Award winners investigate stem cell transplantation, sustainable growth, women in academia, and conservation science
7. BTER Foundation announces winners of the William S. Baer Award
8. American Association of Anatomists announces young investigator award winners
9. Biophysical Society announces winners of 2011 Student Travel Awards
10. Biophysical Society announces winners of 2011 CPOW Travel Awards
11. Biophysical Society announces winners of 2011 International Travel Awards
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The winners of mass extinction: With predators gone, prey thrives
(Date:1/22/2015)... , Jan. 13, 2015 Technology Showcase, Hall E ... identity authentication solutions, today announced it will showcase its EyeLock ... developed by the Department of Energy,s Oak Ridge National ... Auto Show . EyeLock,s iris identity authentication technology is being ...
(Date:1/22/2015)...  Analyst Report Issued by Small Cap IR. In 2011, Nilson ... transactions at merchants on the leading payment cards rose to ... debit, and prepaid cards reached 6.54 billion.  Eight million credit ... usage in 2012, and credit and debit card fraud resulted ...
(Date:12/24/2014)... , Dec. 23, 2014  Since its launch in December 2014, ... to eliminate the pain of trying to remember their usernames ... biometrics fused to their smartphones. To assist people who have ... the company that created 1U and focuses on redefining identity, ...
Breaking Biology News(10 mins):EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 2EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 3$4.80 Near Term Price Target with "Buy" given by CapRock Research for NXT-ID, Inc. (NASDAQ: NXTD) issued by Small Cap IR 21U Offers Best Solution to the Username / Password Dilemma: For FREE! 21U Offers Best Solution to the Username / Password Dilemma: For FREE! 3
... for genetic diseases during in vitro fertilization offers couples ... genetic glitch could potentially cause doctors to misdiagnose a ... , Citing concerns about the accuracy of preimplantation ... the healthiest embryos during IVF, UF researchers set out ...
... a bid to facilitate collaboration among other biomolecular ... Laboratory has become the first institution outside the ... Consortium of Great Britain. , The BioSimGrid was ... Oxford, Southampton, Bristol, Birkbeck, Nottingham and York. Researchers ...
... lead is a well-known human health hazard, researchers at the ... of how it may work in mice to harm the ... bacteria, viruses and other bugs. , The discovery adds insight ... their emphasis from the immediate public health threat to understanding ...
Cached Biology News:Genetic testing still smart choice, despite uncertainties 2Genetic testing still smart choice, despite uncertainties 3Grid bridges 4,800 miles for molecular repositories 2The dangerous legacy of lead 2
(Date:12/24/2014)... 2014 GMO corn cases filed across the ... the process of being consolidated in a Kansas federal court ... AG MIR 162 Corn Litigation, MDL No. 2591 in the ... of the Syngenta GMO corn multidistrict litigation (MDL) has been ...
(Date:12/24/2014)... 2014 SoundConnect’s 2015 ... cutting edge communication technology, provide continued education and ... webinar series demonstrates online communication features and benefits; ... conferencing’s most innovative and powerful tools. , According ...
(Date:12/24/2014)... (PRWEB) December 23, 2014 According to Ross ... Island Affiliate of ITRA Global, the national office market continues ... recovery. This is evidenced by the third quarter’s surprising ... market. Low energy costs have held inflation down and ...
(Date:12/24/2014)... Nashville Fertility Center announced that Dr. ... Society for Reproductive Medicine (ASRM), a leading professional organization committed ... his new role as treasurer, Dr. Hill also fills a ... in furthering the mission of ASRM. , Dr. Hill ...
Breaking Biology Technology:Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3Nashville Fertility Center Announces Dr. George A. Hill Selected to Serve as ASRM Treasurer for 2014-15 2Nashville Fertility Center Announces Dr. George A. Hill Selected to Serve as ASRM Treasurer for 2014-15 3
... Internet sites to provide them with health maintenance information ... the University of Wisconsin-Milwaukee . And Milwaukee-based ... of the study, which aims to examine the factors ... influences people to trust the information provided when making ...
... banner ads, even when users aren't clicking, according to ... sponsored by Ask Jeeves, Google, ING, Lycos Search and ... environment works on two levels: paid click-thrus from active ... surfers. The study included advertising for leading health, auto, ...
... IT Fusion SOS (Small Office Solutions), a ... for its initial client group this month. The ... around an outsourced network management solution set, affording ... WAN, voice, data back-up, e-mail and Web site-hosting ...
Cached Biology Technology:eCare Solutions, UW Milwaukee to study health web sites 2Text ads deliver what you pay for - and more 2Text ads deliver what you pay for - and more 3
For the quantitative determination of canine Interleukin 10,(IL-10) concentrations in cell culture supernates, canine serum,and plasma....
RAT ANTI RAT RT1Au (CLASS I POLYMORPHIC) Immunogen: AO lymphoid cells...
Human VEGF R Phycoerythrin Sampler (Cl 89106, 49560, 54733)...
MOUSE ANTI SIMIAN VIRUS 5:FITC Immunogen: Simian virus 5...
Biology Products: