Navigation Links
Extinction runs in the family
Date:8/8/2009

on during more normal times were hardest hit. Three families with the highest background rates disappeared entirely. Two others, with rates more than twice the median, suffered heavy losses and have not recovered to this day.

"Big extinctions have a filtering effect. They tend to preferentially cull the more vulnerable lineages, leaving the resistant ones to proliferate afterwards," Hunt said.

When extinctions are scattered randomly across the evolutionary tree, the breadth of evolutionary history remains represented among living things, even when many species are lost. Clumped extinctions do the opposite, disproportionately removing the deeper history.

"Extinctions in the past and presumably in the future will lop off chunks of evolutionary trees, not just prune the trees and leave most of the history intact," Jablonski said.

The message for conservation is to focus efforts on vulnerable lineages, the authors say. To preserve the full spectrum of evolutionary history found among living things today, the most fragile families will need careful protection.

Even relatively low levels of threat could eliminate large limbs, Roy said. "If you have whole lineages more vulnerable than others, then very soon, even with relatively moderate levels of extinction, you start to lose a lot of evolutionary history."


'/>"/>

Contact: Kaustuv Roy
kroy@ucsd.edu
University of California - San Diego
Source:Eurekalert

Page: 1 2

Related biology news :

1. Surviving mass extinction by leading a double life
2. Evidence of the Lost World -- did dinosaurs survive the end Cretaceous extinctions?
3. Study shows competition, not climate change, led to Neanderthal extinction
4. Current mass extinction spurs major study of which plants to save
5. Geologist who linked cosmic strike to dinosaurs extinction takes top prize
6. UGA study reveals ecosystem-level consequences of frog extinctions
7. Extinction by asteroid a rarity
8. Mass extinctions and the evolution of dinosaurs
9. Study of islands reveals surprising extinction results
10. A recipe for saving the worlds oceans from an extinction crisis
11. Extinction most likely for rare trees in the Amazon rainforest
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... an expansion of marine protected areas is needed to ... According to investigators from the Wildlife Conservation Society and ... on saving the largest numbers of species, often at ... difficult-to-replace ecological functions. , Many vital ecological ... that also are food for millions of people. ...
(Date:8/28/2014)... Researchers at the University of Minnesota have developed an ... be used for muscle regeneration research as well as ... , The research is published in the current edition ... is no treatment for FSHD, which is thought by ... dystrophy. FSHD is an unusual genetic disorder because, unlike ...
(Date:8/28/2014)... compounds that could positively impact the global ... possible, thanks to researchers in Penn State,s ... suppository made from the seaweed-derived food ingredient ... Tenofovir provides a woman-initiated, drug-delivery vehicle that ... transmitted infections during unprotected heterosexual intercourse, the ...
Breaking Biology News(10 mins):Study finds marine protected areas inadequate for protecting fish and ocean ecology 2UMN researchers find animal model for understudied type of muscular dystrophy 2Sensory-tested drug-delivery vehicle could limit spread of HIV, AIDS 2Sensory-tested drug-delivery vehicle could limit spread of HIV, AIDS 3
... at the Icahn School of Medicine at Mount Sinai, has ... Under 30" list in "Science and Health." The honorees "reflect ... the better, opening up to revolutionary new ideas and new ... Ms. Shapiro, 25, a native of Rochester, New York, discovered ...
... 2012 Women deficient in vitamin D early in their ... weights, University of Pittsburgh Graduate School of Public Health research ... Health, will be reported in the January print edition of ... is now available online. , "A mother,s vitamin D level ...
... the demands and stresses on agriculture. In the January ... , Penn State University Waller Professor of Plant Biology ... stresses by one small, genetically diverse plant species might ... crop products amid decreasing resources. In the article, ...
Cached Biology News:Mount Sinai grad student, 25, named to Forbes '30 Under 30' in Science and Healthcare 2Low vitamin D levels in pregnancy associated with lower birth weights, pitt research finds 2Can observations of a hardy weed help feed the world? 2
(Date:8/28/2014)... PA (PRWEB) August 28, 2014 The ... create a culture that will allow individuals to perform ... becoming increasingly important for employers looking to compete in ... industries are embracing this trend, as the sector increasingly ... of a company, which will have real results on ...
(Date:8/28/2014)... Exciting new work by a Florida State University ... that can take your temperature, emit white light, and ... the molecule looks like a butterfly. , Biwu Ma, ... Engineering in the FAMU-FSU College of Engineering, created the ... has continued to discover that his creation has many ...
(Date:8/28/2014)... San Diego, CA (PRWEB) August 28, 2014 ... products, Pipette.com is offering a promotion for ... enables Pipette.com customers to purchase the highest quality ... Centrifuge Tubes are ideal for customers doing chemical, ... benefit lab technicians who are not regularly able ...
(Date:8/27/2014)... In 2013, Lawrence Livermore National ... Security LLC (LLNS), was awarded more than ... laser system for the European Union's Extreme Light ... the Czech Republic. , When commissioned to its ... " High repetition-rate Advanced Petawatt Laser System " ...
Breaking Biology Technology:Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 3LLNL Synchs up with ELI Beamlines on Timing System 2LLNL Synchs up with ELI Beamlines on Timing System 3
... May 5, 2011 Advanced Life Sciences Holdings, ... the discovery, development and commercialization of novel drugs in ... announced today that it has suspended operations and terminated ...   (Logo:   http://photos.prnewswire.com/prnh/20080218/ALSLOGO ) ...
... Codexis, Inc. (NASDAQ: CDXS ) today announced ...   First Quarter Financial Highlights:Revenue: For the ... million, an increase of 21% from $25.7 million in the ... 106% over the same time period driven by more than ...
... CARLOS, Calif., May 5, 2011 PharmacoFore, Inc., a ... announced today that it is a sponsor of the ... Meeting, scheduled for November 29, 2011 in Washington, DC. ... CEO of PharmacoFore, Inc., stated, "PharmacoFore shares CLAAD,s objective ...
Cached Biology Technology:Advanced Life Sciences Suspends Operations 2Codexis Reports First Quarter 2011 Results 2Codexis Reports First Quarter 2011 Results 3Codexis Reports First Quarter 2011 Results 4Codexis Reports First Quarter 2011 Results 5Codexis Reports First Quarter 2011 Results 6Codexis Reports First Quarter 2011 Results 7PharmacoFore, Inc. Announces Sponsorship of the 2011 CLAAD National Prescription Drug Abuse Prevention Policy Consensus Meeting on November 29, 2011 in Washington, DC 2PharmacoFore, Inc. Announces Sponsorship of the 2011 CLAAD National Prescription Drug Abuse Prevention Policy Consensus Meeting on November 29, 2011 in Washington, DC 3
Request Info...
...
Request Info...
Agarose-LE, 500 g. Suitable for soft agarose cloning. Nuclease-free.Gel point (1.5%): 36 1.5 C, EEO (-mr): 1200 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Biochemicals ....
Biology Products: