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 $1 million prize in Office of Naval Research challenge
5. Filmmakers Joel and Ethan Coen among 2011 Dan David Prize winners
6. Joshua E. Neimark Memorial Travel Assistance Award winners investigate stem cell transplantation, sustainable growth, women in academia, and conservation science
7. BTER Foundation announces winners of the William S. Baer Award
8. American Association of Anatomists announces young investigator award winners
9. Biophysical Society announces winners of 2011 Student Travel Awards
10. Biophysical Society announces winners of 2011 CPOW Travel Awards
11. Biophysical Society announces winners of 2011 International Travel Awards
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The winners of mass extinction: With predators gone, prey thrives
(Date:4/20/2015)... 20, 2015 The announcement comes ... Glenbeigh Records Management (GRM), Ireland,s foremost ... Bank. Having built up an impressive track record of clients ... player within the records management sector in Dubai ... is GCC staffbase and employ a further eight staff members ...
(Date:4/13/2015)... 2015 According to a ... Market Forecast & Opportunities, 2020", the global biometrics market ... 14% till 2020. The biometrics market is garnering ... and review of biometric management systems. The constant ... with greater efficiency, are resulting in increasing installation ...
(Date:4/8/2015)... , April 8, 2015  Infinisource, a ... and services, and Morpho, a leading supplier of ... to produce the market,s most advanced biometrically-enabled time ... iSolved NXG time clock is setting a bold, ... labor data for the small and mid-size employer. ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3
... by the Duke-NUS Graduate Medical School (Duke-NUS) in Singapore ... key protein linked to stem cell-like behavior in terminal-stage ... drugs that may extend the survival of these patients. ... Proceedings of the National Academy of Sciences , ...
... to reduce by more than half the time it takes ... researchers in Penn State,s College of Agricultural Sciences. The finding ... foodborne illness, allowing epidemiological investigators to identify the exact strains ... more quickly find -- and eliminate -- the source of ...
... long been used for various purposes, like cleaning wastewater at ... handcrafted wickerwork, as means of nutrition and, in traditional medicine, ... Fraunhofer Institute for Building Physics IBP in Valley now want ... to wit, for the insulation of outer walls or ...
Cached Biology News:Singapore research team identifies new drug target in deadly form of leukemia 2Researchers develop a faster method to identify Salmonella strains 2Researchers develop a faster method to identify Salmonella strains 3Using cattails for insulation 2Using cattails for insulation 3
(Date:4/24/2015)... DryLet, LLC a biotechnology company ... as animal waste reduction, bioremediation, wastewater treatment, aquaculture ... treatment plants and restaurant kitchen settings, announced today ... Restaurant Association’s NRA Show 2015, in Chicago, Illinois ... company will be available to share information about ...
(Date:4/24/2015)... 2015 PAREXEL International Corporation (NASDAQ: PRXL ... that Partnerships in Clinical Trials named PAREXEL,s Drew ... Innovator of the Year.  The honor recognizes Mr. Garty,s ... Perceptive MyTrials ® Data-Driven Monitoring solution. ... 2015 Partnership Awards in Boston , ...
(Date:4/23/2015)... 2015 /CNW/ - A new and innovative service has ... North America,s largest packaging trade ... in the "Sustainability, service" category of the PAC ... Comparison" is a service that scores clients, packaging ... peers. This benchmarking process shows clients how their ...
(Date:4/23/2015)... San Jose, California (PRWEB) April 23, 2015 ... – Predictive diagnostics refer to a series of ... such as cystic fibrosis, Lou Gehrig's disease, Huntington's ... beneficial in examining the gene composition and interaction ... of the disease as well as the response ...
Breaking Biology Technology:DryLet to Showcase Bio-React at the National Restaurant Association’s NRA Show 2015 May 16-19, 2015 in Chicago, Illinois 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5Increasing Disease Prevalence & Focus on Preventive Healthcare Drive the Predictive Diagnostics Market, According to a New Report by Global Industry Analysts, Inc. 2Increasing Disease Prevalence & Focus on Preventive Healthcare Drive the Predictive Diagnostics Market, According to a New Report by Global Industry Analysts, Inc. 3
... Scientists engaged in biological research and drug discovery are ... BioInformatics, LLC ( www.gene2drug.com ), the premier research ... released preliminary data from the company,s newest report ... Science Suppliers. In this report, we set out ...
... LOUIS, Feb. 11 Sigma-Aldrich, a leading Life,Science and High ... by 6% to $0.68 from $0.64 in the same quarter ... $510 million in the fourth quarter 2008 declined by 4%,compared ... fourth,quarter grew 3% from a year ago. Fourth quarter organic ...
... Development for Chronic Pain IndicationsLA JOLLA, Calif., Feb. ... TPTX ) today announced that oral administration of ... and well-tolerated in healthy male and female subjects ... successful completion of this Phase I trial demonstrating ...
Cached Biology Technology:Life Science Labs Reacting to the Economic Crisis 2Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 2Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 3Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 4Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 5Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 6Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 7Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 8Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 9Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 10Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 11Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 12Sigma-Aldrich (Nasdaq: SIAL) Reports Fourth Quarter Diluted EPS of $0.68. Ends 2008 With Record Sales and Earnings and Raises Quarterly Cash Dividend by 11.5%. Provides Outlook for 2009. 13First Multiple Dose Clinical Trial of TorreyPines Therapeutics' Oral Compound NGX426 Demonstrates Compound Is Safe and Well-Tolerated 2First Multiple Dose Clinical Trial of TorreyPines Therapeutics' Oral Compound NGX426 Demonstrates Compound Is Safe and Well-Tolerated 3First Multiple Dose Clinical Trial of TorreyPines Therapeutics' Oral Compound NGX426 Demonstrates Compound Is Safe and Well-Tolerated 4