Navigation Links
Mass extinctions and the evolution of dinosaurs
Date:9/30/2008

Reporting in Biology Letters, Steve Brusatte, Professor Michael Benton, and colleagues at the University of Bristol show that dinosaurs did not proliferate immediately after they originated, but that their rise was a slow and complicated event, and driven by two mass extinctions.

"The sheer size of dinosaurs like Tyrannosaurus makes us think there was something special about these animals that preordained them for success right from the beginning," Brusatte said. "However, our research shows that the rise of dinosaurs was a prolonged and complicated process. It isn't clear from the data that they would go on to dominate the world until at least 30 million years after they originated."

Importantly, the new research also shows that dinosaurs evolved into all their classic lifestyles big predators, long-necked herbivores, etc. long before they became abundant or diversified into the many different species we know today.

Brusatte added: "It just wasn't a case of dinosaurs exploding onto the scene because of a special adaptation. Rather, they had to wait their turn and evolved in fits and starts before finally dominating their world."

Dinosaurs originated about 230 million years ago and survived the Late Triassic mass extinction (228 million years ago), when some 35 per cent of all living families died out. It was their predecessors dying out during this extinction that allowed herbivorous dinosaurs to expand into the niches they left behind.

The rapid expansion of carnivorous and armoured dinosaur groups did not happen until after the much bigger mass extinction some 200 million year ago, at the Triassic-Jurassic boundary. At least half of the species now known to have been living on Earth at that time became extinct, which profoundly affected life on land and in the oceans.

Historically the rise of the dinosaurs has been treated as a classic case in which a group evolves key features that allow it to
'/>"/>

Contact: Cherry Lewis
Cherry.lewis@bristol.ac.uk
44-117-928-8086
University of Bristol
Source:Eurekalert

Page: 1 2

Related biology news :

1. Oceans on the precipice: Scripps scientist warns of mass extinctions and rise of slime
2. The mystery of mass extinctions is no longer murky
3. Stanford researchers say climate change will significantly increase impending bird extinctions
4. Research team says extraterrestrial impact to blame for Ice Age extinctions
5. Advance offers revolution in food safety testing
6. Worm genome offers clues to evolution of parasitism
7. Insight into the evolution of parasitism
8. Scientists find redesigned hammer that forged evolution of pregnancy in mammals
9. Evolution in plain language
10. Computational biochemist uncovers a molecular clue to evolution
11. Molecular evolution is echoed in bat ears
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... of researchers at Louisiana Tech University has ... consumer-grade 3D printers and materials to fabricate ... and chemotherapeutic compounds for targeted drug delivery. ... and research faculty from Louisiana Tech,s biomedical ... create filament extruders that can make medical-quality ...
(Date:8/21/2014)... resulting in severe abdominal pain, vomiting and systemic inflammation. ... diagnosed with the disease resulting in 1000 deaths. There ... intravenous fluid and nutritional support. , Dr Jason ... the research, said "The major causes of pancreatitis include ... intake combined with a high fat diet. In fact, ...
(Date:8/20/2014)... Researchers at Huntsman Cancer Institute (HCI) at the University ... the gene that encodes BCR-ABL, the unregulated enzyme driving ... the American Cancer Society, nearly 6,000 new cases of ... in use, called tyrosine kinase inhibitors (TKIs), target BCR-ABL ... not cure CML but control it in a way ...
Breaking Biology News(10 mins):Louisiana Tech University researchers use 3D printers to create custom medical implants 2Louisiana Tech University researchers use 3D printers to create custom medical implants 3Insulin offers new hope for the treatment of acute pancreatitis 2Blueprint for next generation of chronic myeloid leukemia treatment 2
... the Smithsonian Institution and the Hawaii Institute of Marine ... created the first frozen bank for Hawaiian corals in ... preserve their diversity in Hawaii. Mary Hagedorn, an adjunct ... the Smithsonian Conservation Biology Institute, leads the laboratory at ...
... underlay many cancers. Rui Martinho at the Instituto Gulbenkian ... in Ghent (Belgium) and Bergen (Norway) will use the ... identified in the test-tube, impact on the way cells ... the Association for International Cancer Research (AICR), will provide ...
... of an old antibiotic may help diabetics avoid a stroke ... researchers report. Minocycline, a drug already under study at ... blood vessels in the brain that increases their stroke risk ... Dr. Adviye Ergul, physiologist in the MCG Schools of Medicine ...
Cached Biology News:Smithsonian scientists help create first frozen repository for Hawaiian coral 2Understanding cancer using the fruit fly 2Antibiotic may reduce stroke risk and injury in diabetics 2
(Date:8/22/2014)... Greenville, SC (PRWEB) August 22, 2014 ... that indisputable acknowledgement is a national disgrace. Furthermore, ... part in establishing the current, deplorable state of ... outlined "5 great mistakes," to merely serve as ... convey the extent of colossal failure(s) that have ...
(Date:8/21/2014)... team including DESY scientists has observed tiny quantum vortices ... in the journal Science that the exotic ... nanodroplets. It is the first time that the quantum ... of what is known as superfluid helium, have been ... expectations," says Andrey Vilesov of the University of Southern ...
(Date:8/21/2014)... , Aug. 21, 2014 Telomere Biosciences, ... their Nutraceutical "TELO-20 for Dogs" with Telomerase ... supplement in the world for dogs. Telomeres are ... chromosome in the body. A wealth of ground-breaking ... in Telomere Science and Aging, including Nobel laureates, ...
(Date:8/21/2014)... 2014 OTC Markets Group Inc. ... biotechnology company, on its approval to list on ... OTCQX®, the best marketplace for established U.S. and ... Logo - http://photos.prnewswire.com/prnh/20110118/MM31963LOGO ... of its growth strategy and achievement of this ...
Breaking Biology Technology:5 Great Mistakes in Healthcare and How to Fix Them by Dr. Ira Williams 2Scientists observe quantum vortices in cold helium droplets 2Telomere Biosciences Announces: TELO-20 for Dogs, the World's First Telomere-Lengthening Supplement for Dogs, to Promote Healthy Aging and Longevity 2Telomere Biosciences Announces: TELO-20 for Dogs, the World's First Telomere-Lengthening Supplement for Dogs, to Promote Healthy Aging and Longevity 3OTC Markets Group Congratulates Immune Pharmaceuticals on NASDAQ Listing 2
... BioSciences, Inc. (OTC Bulletin Board: GNLK ... that it ranked number 33 on Technology Fast 500 ... growing technology, media, telecommunications, life sciences and clean technology ... the period 2006-2010. GeneLink,s chief executive ...
... Inc ., a late-stage epigenetics oncology company, announced today that members ... BIO Investor Forum , San Francisco, CA, October ... Target , Panel Discussion: HDACi and Their Progress in the Clinic, ... Healthcare Conference , New York, NY, November 16, 1:30 PM ET ...
... 24, 2011 Modern Plastics, one of the largest ... plastics, has become ISO 13485-2003 certified for the distribution ... Resin. "This is an extraordinary achievement ... service and quality," said Bing J. Carbone, President at ...
Cached Biology Technology:GeneLink BioSciences, Inc. Ranked Number 33 Fastest Growing Company in North America on Deloitte's 2011 Technology Fast 500™ 2GeneLink BioSciences, Inc. Ranked Number 33 Fastest Growing Company in North America on Deloitte's 2011 Technology Fast 500™ 3Syndax Pharmaceuticals to Present at Upcoming Fall Conferences 2
... Desselberger (1995) • This book is ... classical and molecular techniques currently used ... and analysis of virus-specific antibodies and ... presented covering immunoassays, blotting and hybridization ...
Bovine Serum...
Mus musculus junctophilin 2 (Jph2) Antigen: Recombinant Protein...
2.0 GHz Compaq Computer with 512 MB RAM, 32 MB AGP Graphics Card, 40 GB Hard Drive, 1 Serial Port & Open PCI Slot, Windows 2000 OS, MS Office, CD Read/Writer and 18 Flat Panel Monitor...
Biology Products: