Navigation Links
The winners of mass extinction: With predators gone, prey thrives

erly College Centennial Professor of Geology at West Virginia University. "There had to be some underlying evolutionary and ecological reason for that."

Researchers considered whether a change in the environment, such as water temperature or depth, could explain the crinoid explosion, Kammer said. Changes in predation were also proposed, but hard to test using the fossil record.

"You don't actually find the evidence of a fossil fish with a crinoid in its mouth very often," Kammer said.

The riddle was solved through multi-institutional collaboration and data-sharing. A database of crinoid diversity in the fossil record assembled by Kammer and William Ausich, PhD, study co-author and Professor of Earth Sciences at Ohio State University, was compared to a vertebrate dataset created by Sallan.

When the datasets were placed side by side and analyzed, a clear relationship emerged. As fish populations thrived in the Devonian, crinoid diversity and abundance remained low despite favorable conditions. But after the Hangenberg event devastated fish species, crinoids thrived, diversifying and multiplying. The data suggests the ripple effects of a mass extinction upon ecosystems can last millions of years.

"This study demonstrates a clear example of processes that operate in ecological time predator-prey relationships becoming significant in evolutionary time," Ausich said. "This means that ecological patterns and processes taking place today may have very long-reaching evolutionary effects. And although that idea may not seem particularly surprising at first, respected evolutionary biologists have long argued that it was not possible."

Eventually, the success of crinoids came to an end. As fish species recovered to previous levels, crinoid populations declined in tandem further evidence for typical predator-prey dynamics known as Lotka-Volterra cycles in modern ecology.

Fossils even suggest that the long period

Contact: Robert Mitchum
University of Chicago Medical Center

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:
Related Image:
The winners of mass extinction: With predators gone, prey thrives
(Date:9/30/2015)... GARDENS, Fla. , Sept. 30, 2015  The ... this month issued another key ruling in favor of ... determination that Korean fingerprint scanner company Suprema and its ... Act of 1930, a trade provision that declares it ... import trade, by infringing two of Crossmatch,s patents, the ...
(Date:9/28/2015)... 28, 2015  The monitoring of vital signs, ... temperature, is an essential component of patient assessment. ... deterioration in a patient,s condition. However, in general ... typically taken during routine observation rounds only once ... deteriorates between these observation rounds, the warning signs ...
(Date:9/24/2015)...  EyeLock LLC, a market leader of iris-based identity ... latest technology in Booth #602 at next week,s ASIS ... EyeLock,s iris authentication technology provides an unprecedented level ... it the most proven way to authenticate one,s identity ... deliver a fast and friendly user experience to identify ...
Breaking Biology News(10 mins):
... tissues into mice, researchers report in the November Cell ... normal and obese mice. The findings suggest that the hormone ... insulin resistance and type 2 diabetes. , Insulin resistance, in ... sugar (glucose) levels, is a precursor to diabetes. ...
... Cancer Symposium features the latest findings in laboratory, translational ... on new and promising therapeutic approaches, as well as ... To help you take the best advantage of ... you to visit to view the ...
... N.Y. (Mon., Nov. 3, 2008) Understanding the ... tissues requires experimental systems that allow for the study ... laboratory. This month,s issue of Cold Spring ... with detailed instructions for setting up these experimental culture ...
Cached Biology News:
(Date:10/7/2015)... Calif. , Oct. 7, 2015  ChromaDex ... wellness and nutritional ingredients that creates science-based solutions ... sports nutrition, and pharmaceutical products, today announced that ... , CEO and Founder, is now available for ...   -->   ...
(Date:10/7/2015)... , Oct. 7, 2015  October is National Liver ... has committed to donating a portion of its October ... and hepatology practices. ... in a variety of ways; whether it is by ... world, collaborating with researchers in different disease and investigation ...
(Date:10/7/2015)... ... October 07, 2015 , ... Park Systems , ... Coatings to provide a comprehensive overview of the innovations in smart coatings using ... . This webinar will be given by Professor Roberto Advincula, professor with ...
(Date:10/7/2015)... ... October 07, 2015 , ... Tunnell Consulting , Inc. ... the Operational and Process Improvement practice. He brings to his role more than ... “I am delighted that Dr. Matzmorr is joining our team,” said Dr. Philippe Cini, ...
Breaking Biology Technology:
... Following the,establishment of their Industrial Management Board, ... is happy to announce its,official launch event to ... of M.B.N Nanomaterialia, the board members Mr Manfred ... Andrea Reinhardt of microTEC,look forward to a very ...
... Fame Coach Jim Calhoun Credits Early Diagnosis with ... two of AdvaMed 2007:,The MedTech Conference will highlight how ... technology as well as speakers on the,diversity and strength ... conference runs Oct. 1 through Oct. 3., Co-writing ...
... October 2 - Management and Distinguished ... Development Programs, as Well as on,the microRNA Field ... a global leader in,microRNA-based diagnostics and therapeutics, announced ... and their significant potential in cancer,treatment and other ...
Cached Biology Technology:
Mouse monoclonal [YPF19] to Yersinia pestis ( Abpromise for all tested applications)....
Rabbit polyclonal to 13,14 dihydro 15 keto Prostaglandin E2 ( Abpromise for all tested applications)....
DDO Immunogen: DDO (NP_003640, 270 a.a. ~ 370 a.a) partial recombinant protein with GST tag. Storage: -20 C, Avoid Freeze/Thaw Cycles *Available for distribution in the US only...
Arginine vasopressin receptor (AVP-V2), rat. The peptide used for immunization has no significant similarity with AVP V1a or V1b receptors....
Biology Products: