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:10/19/2014)... Improving household electricity access in India over the ... nation,s total carbon emissions growth during that time, ... journal Nature Climate Change ., "Energy access ... all aspects of life, including education, communication, and ... the study. , While increased energy access is ...
(Date:10/17/2014)... Rockville, MD – Accurate knowledge regarding Ebola is critical ... current risk of hazardous global outbreak and epidemic. The ... has launched a special issue, Ebola Virus and Public ... with necessary knowledge in this critical societal moment. ... Primer on Ebola for Clinicians . The primer was ...
(Date:10/16/2014)... Cancer constantly wages war on the human body. ... a stalemate. In pancreatic cancer, this stalemate—known as ... becoming aggressively malignant, a phenomena that is poorly ... in the laboratory of Salvatore Torquato, a Professor ... the conditions surrounding tumor dormancy and the switch ...
Breaking Biology News(10 mins):Improved electricity access has little impact on climate change 2Modeling tumor dormancy 2
... found a way of stimulating the immune systems ... the devastating plaques,that are characteristic of Alzheimer's disease.,For ... a,protein-based vaccine to slow the progression of the ... created a gene-based,vaccine aimed at stimulating the immune ...
... cells',responsible for hearing and balance. Traditionally viewed as ... for the normal development,of nerve cells responsible for ... research. The study is reported in the January ... scientists at the University,of Washington.,"Using zebrafish as a ...
... essential for 'hair cells',responsible for hearing and balance. ... may be essential for the normal development,of nerve ... new,University of Utah research. The study is reported ... is co-authored by scientists at the University,of Washington.,"Using ...
Cached Biology News:Gene vaccine for Alzheimer's disease shows promising results 2GenMAPP 2.0 released 2Harmful Bacterium Commonly Found in Poultry May Survive Refrigeration and Frozen Storage Combined 2
(Date:10/25/2014)... October 24, 2014 Today, Nerium International, ... the winners of its “Reflect Your Youth” contest, an ... only seen a difference in their skin since using ... new outlook on life as a result of their ... as an effort by Nerium International to inspire conversations ...
(Date:10/25/2014)... Durham, NC (PRWEB) October 24, 2014 ... appears to overcome several pitfalls of current skin grafting ... scarring and produces hair. The method, outlined in the ... a breakthrough for treating deep skin injuries that result ... skin injury completely destroys the skin’s regenerative elements. These ...
(Date:10/25/2014)... October 24, 2014 Oramed Pharmaceuticals ... company focused on the development of oral drug delivery ... Kidron will present at FireRock Capital,s Micro-Cap Conference. ... Micro-Cap Conference ,Date: Tuesday, October 28, 2014 ,Time: 9:15am ... New York City , About ...
(Date:10/25/2014)... Oct. 24, 2014  RegeneRx Biopharmaceuticals, Inc. (OTCBB: RGRX) ("the ... the Fourth International Symposium on Thymosins in Health and ... "When thymosin beta 4 (TB4) linked with ... peritoneal cavity in a rodent model of stroke, it ... brain parenchyma (the functional tissue of the brain).   The ...
Breaking Biology Technology:Nerium International™ Inspires Conversation About the Journey of Aging with “Reflect Your Youth” Contest 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 3Oramed to Present at the FireRock Annual Micro-Cap Conference 2Oramed to Present at the FireRock Annual Micro-Cap Conference 3Researchers Report Thymosin Beta 4 Crosses Blood-Brain Barrier In Animal Stroke Model 2
... Wash., June 16, 2011 SCOLR Pharma, Inc. (OTC: ... of $1 million principal amount of its 8% Senior ... initial closing of its private offering of up to ... offer additional Debentures, up to the aggregate maximum of ...
... KNDL ), a leading, global full-service ... senior clinical development experts will present on important ... 47th Annual Meeting, June 19-23, 2011, in Chicago. ... benefits of hybrid monitoring; finding an economic balance ...
... 2011 MacuCLEAR, Inc., a specialty clinical stage pharmaceutical ... vascular disorders of the eye, announced today that Philip ... OneMedForum New York 2011 on Thursday, June 23, 2011 ... New York City.   OneMedForum will focus ...
Cached Biology Technology:SCOLR Pharma, Inc. Announces Initial Closing of Private Placement 2SCOLR Pharma, Inc. Announces Initial Closing of Private Placement 3Kendle Experts to Address Key Industry Issues at Drug Information Association 47th Annual Meeting 2Kendle Experts to Address Key Industry Issues at Drug Information Association 47th Annual Meeting 3MacuCLEAR, Inc. to Present at OneMedForum New York 2011 and at the 2011 BIO Business Forum During the Annual BIO International Convention in Washington, D.C. 2
Mouse monoclonal antibody raised against a partial recombinant ZNF155. NCBI Entrez Gene ID = ZNF155...
... macroporous polystyrene beads for hydrophobic interaction chromatography. ... adsorbing organics of molecular weight less than ... useful for the adsorption of nonpolar substances ... removal of detergents such as Triton X-100 ...
... : Fusion protein corresponding to ... human Mi-2 Formulation: 0.7M Tris-glycine, ... sodium azide, containing 30% glycerol ... immunoblot on Hela nuclear extract ...
... Phospho-Specific(Thr 222 ) ... 10 mM sodium HEPES, 100 ... 7.5. Recognizes the ~47 kDa ... (MAPKAPK-2) protein phosphorylated at Thr ...
Biology Products: