Navigation Links
Extinctions during human era worse than thought
Date:9/2/2014

ological periods such as the one that eliminated the dinosaurs biodiversity has slowly increased.

The new study next examined evidence from the evolutionary family trees phylogenies of numerous plant and animal species. Phylogenies, constructed by studying DNA, trace how groups of species have changed over time, adding new genetic lineages and losing unsuccessful ones. They provide rich details of how species have diversified over time.

"The diversification rate is the speciation rate minus the extinction rate," said co-author Lucas Joppa, a scientist at Microsoft Research in Redmond, Wash. "The total number of species on earth has not been declining in recent geological history. It is either constant or increasing. Therefore, the average rate at which groups grew in their numbers of species must have been similar to or higher than the rate at which other groups lost species through extinction."

The work compiled scores of studies of molecular phylogenies on how fast species diversified.

For a third approach, de Vos noted that the exponential climb of species diversity should take a steeper upward turn in the current era because the newest species haven't gone extinct yet.

"It's rather like your bank account on the day you get paid," he said. "It gets a burst of funds akin to new species that will quickly become extinct as you pay your bills."

By comparing that rise of the number of species from the as-yet unchecked speciation rate with the historical trend (it was "log-linear") evident in the phylogenies, he could therefore create a predictive model of what the counteracting historical extinction rate must have been.

The researchers honed their models by testing them with simulated data for which they knew an actual extinction rate. The final models yielded accurate results. They tested the models to see how they performed when certain key assumptions were wrong and on average the models remained
'/>"/>

Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Sea star disease epidemic surges in Oregon, local extinctions expected
2. A smoking gun on the Ice Age megafauna extinctions
3. Geology tracks eruptions, earthquakes, erosion, extinctions & more
4. Dinosaur die-out might have been second of 2 closely timed extinctions
5. Top predators key to extinctions as planet warms
6. Smoking during pregnancy may affect grandchildrens growth
7. Maternal singing during skin-to-skin contact benefits both preterm infants and their mothers
8. GW researcher receives grant to answer the how and why of autism during development
9. Fires in Central Africa During July 2014
10. Rewriting the history of volcanic forcing during the past 2,000 years
11. One third of dyslexic adults report being physically abused during childhood
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... MOUNTAIN VIEW, Calif. , Nov. 20, 2014 /PRNewswire/ ... for higher driver efficiency are piloting the North American ... the number of accidents growing, gesture recognition systems that ... will make a mark in the industry. ... of the Automotive Gesture Recognition Market in ...
(Date:11/18/2014)... Md. , Nov. 17, 2014 The Parenteral ... and U.S. regulatory agencies will speak and at least seven ... Metrics Conference at the Omni Shoreham Hotel in ... pleased once again to have significant support from the regulatory ... Europe in our effort to help ...
(Date:11/10/2014)... U.S. store shelves in early 2010, and people have ... packets can be tossed into a washing machine without ... The convenience, though, has come with risks for young ... Children,s Hospital found that from 2012 through 2013, U.S. ... than 6 years of age swallowing, inhaling, or otherwise ...
Breaking Biology News(10 mins):Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2Study finds laundry detergent pods, serious poisoning risk for children 2
... 2008) Transfusion science, a discipline ... associated with blood transfusion and tissue transplantation, has made ... of an informative book in this field, Transfusion ... The first edition of Transfusion Science ...
... schizophrenia, major depression and cancer are not caused ... A novel computational biology method developed by a ... http://www.njit.edu/news/2008/2008-367.php , associate professor in NJIT,s department of ... to uncover the critical genes responsible for disease ...
... California team that developed a successful insect pest ... pesticide reduction, will be honored at the Entomological ... in Reno. The seven-member Almond Pest Management ... the Entomological Foundation,s "2008 Award for Excellence in ...
Cached Biology News:New book includes advances in the science and practice of transfusion and transplantation 2NJIT professor finds engineering technique to identify disease-causing genes 2Almond pest management team to receive major award at ESA meeting 2
(Date:12/15/2014)... NEW YORK & PETACH TIKVAH, ... Therapeutics Inc. (NASDAQ: BCLI ), a leading ... announced today that wholly-owned subsidiary Brainstorm Cell Therapeutics Ltd. ... Israel,s Office of the Chief ... has been in receipt of grant support from the ...
(Date:12/13/2014)... CanDiag, Inc., a University of North Carolina at ... to OncoTab, Inc. , “The new name is ... said CEO and Chief Science Officer, Dr. Pinku Mukherjee, ... diagnostics to include imaging and therapies, and our new ... in 2011 by Dr. Mukherjee, an Irwin Belk Endowed ...
(Date:12/13/2014)... 2014 The “Global Synthetic Biology ... drivers, threats, opportunities, and challenges. , The global ... players, namely, Thermo Fisher Scientific, Inc. (U.S.), DuPont ... jointly accounted for approximately ~65% of the total ... Copy for This Report @ http://www.marketsandmarkets.com/Market-Reports/synthetic-biology-market-889.html ...
(Date:12/13/2014)... , Dec. 12, 2014  Vaccinex Inc., ... discovery and development of therapeutic monoclonal antibodies ... announced publication of a manuscript entitled "SEMA4D ... remyelination in neurodegenerative disease" in the January ... Disease*.  The publication highlights an important role ...
Breaking Biology Technology:BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 2BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 3CanDiag Inc. Expands Product Scope Under a New Name: OncoTab, Inc. 2Synthetic Biology Market to HIt $5.6304 Billion by 2018 - New Research Report by MarketsandMakets 2Synthetic Biology Market to HIt $5.6304 Billion by 2018 - New Research Report by MarketsandMakets 3Vaccinex announces publication of preclinical studies with an anti-SEMA4D antibody in animal models of neuroinflammatory and demyelinating disease 2
... for Consistent,Electronic Health Record for All Citizens Using ... GREAT RIVER, N.Y., Oct. 16 Netsmart ... services for health and,human services organizations, today announced ... services contract by the City and County of ...
... on InterMune Phase 3 CAPACITY Program - ... patient retention rate in CAPACITY -, BRISBANE, Calif., Oct. ... on October 16, 2008, the Japanese,Ministry of Health, Labor and ... & Co. Ltd. to market pirfenidone,for the treatment of patients ...
... a leading center for medical excellence; collaboration will focus ... biomaterials and ... grant from the John S.,and James L. Knight Foundation, five leading ... in,Akron -- a unique collaboration that will expand upon the region,s ...
Cached Biology Technology:Netsmart Technologies Selected by City and County of San Francisco to Provide Integrated Behavioral Healthcare Software System 2Netsmart Technologies Selected by City and County of San Francisco to Provide Integrated Behavioral Healthcare Software System 3InterMune Reports Japanese Regulatory Approval of Pirfenidone in IPF 2InterMune Reports Japanese Regulatory Approval of Pirfenidone in IPF 3InterMune Reports Japanese Regulatory Approval of Pirfenidone in IPF 4BioInnovation Institute in Akron Launched 2BioInnovation Institute in Akron Launched 3BioInnovation Institute in Akron Launched 4
One bottle containing 30 ml of protein solution and 0.1% sodium azide....
...
DONOR BOVINE SERUM AND PLASMA...
Full-length cDNA 5-PRIME end of clone CS0DE013YM09 of Placenta of Homo sapiens (human). [Source:Uniprot/SPTREMBL;Acc:Q86TS7] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
Biology Products: