Navigation Links
Super predators and mass extinctions

Mass extinctions seem to occur on Earth roughly every 26 million years, leading some scientists to propose that they may be caused by rare collisions with comets or asteroids. A researcher in Poland thinks it may be possible that extraordinary predators are at fault instead.

Adam Lipowski (Adam Mickiewicz University) constructed a numerical model of many species competing for both food and living space. The model also included a term that controls mutation rates, allowing new species to develop over time. The model shows that, much of time, the system is populated with "medium efficiency" predators whose numbers fluctuate only slightly as the prey population waxes and wanes. Inevitably, their stable community is disrupted when mutations lead to a super predator that quickly decimates the prey population, which in turn leads to its own demise. The few creatures that survive the predatory apocalypse gradually mutate to fill the existing ecological niches - and the cycle begins again.

The period of the cycle depends on mutation rates in the model. The lower the mutation rate, the longer the periods between super predators. For a sufficiently low mutation rate, the model can lead to cycles that correspond to our 26 million year mass extinctions.

Previous models that do not show these sorts of cycles could be faulty, according to Lipowski, because they failed to account for the effects of limited living spaces shared by a large number of different species.

A. Lipowski
Phys. Rev. E 71, 052902 (2005), 20 May 2005
http://link.aps.org/abstract/PRE/v71/e052902


'"/>

Source:American Physical Society


Page: 1

Related biology news :

1. Chemists create Superbowl molecule; May lead to better health
2. Supercomputer Dedicated To Bioengineering, Computational Biology Installed
3. Supercomputers to focus brains on AIDS dilemma
4. SuperLigands - a database of ligand structures derived from the Protein Data Bank
5. Superconducting magnet attracts molecular research
6. Supersized island of resistance genes discovered in an infectious bacterium
7. Super-sized cassava plants may help fight hunger in Africa
8. Supercomputing equipment to advance the frontiers of computational biology
9. Super enzyme may lead way to better tumor vaccines
10. Super-fermenting fungus genome sequenced
11. Creeping crinoids! Sea lilies crawl to escape predators, new video shows
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/3/2017)... WASHINGTON , April 3, 2017 /PRNewswire-USNewswire/ ... single-cell precision engineering platform, detected a statistically ... cell product prior to treatment and objective ... highlight the potential to predict whether cancer ... prior to treatment, as well as to ...
(Date:3/29/2017)... , March 29, 2017  higi, the health IT ... North America , today announced a ... the acquisition of EveryMove. The new investment and acquisition ... of tools to transform population health activities through the ... data. higi collects and secures data today ...
(Date:3/24/2017)... -- Research and Markets has announced the addition of ... - Industry Forecast to 2025" report to their offering. ... The Global Biometric Vehicle ... around 15.1% over the next decade to reach approximately $1,580 million ... estimates and forecasts for all the given segments on global as ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... At its ... announced Dr. Suneel I. Sheikh, the co-founder, CEO and chief research scientist of ... been selected for membership in ARCS Alumni Hall of Fame . ASTER ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
(Date:10/10/2017)... CALIF. (PRWEB) , ... October 10, 2017 , ... San ... part of its corporate rebranding initiative announced today. The bold new look is ... reach, as the company moves into a significant growth period. , It will also ...
(Date:10/10/2017)... SomaGenics announced the receipt of a Phase ... (Single Cell), expected to be the first commercially available ... from single cells using NGS methods. The NIH,s recent ... development of approaches to analyze the heterogeneity of cell ... for measuring levels of mRNAs in individual cells have ...
Breaking Biology Technology: