HOME >> BIOLOGY >> NEWS
Inherent speed limit governs how quickly life bounces back after extinction, UC Berkeley research shows

The 500-million-year history of life on Earth is a series of booms and busts. But while the busts, or extinctions, can be either sudden or gradual, the booms of diversification of new organisms rarely happen quickly, according to a new study by a University of California, Berkeley, scientist.

A statistical analysis of the rates of extinction and origination in the fossil record shows that life seldom rebounds rapidly from an extinction.

The results imply that the diversification of life obeys "speed limits" set by evolutionary processes, said study author James Kirchner, professor of earth and planetary science at UC Berkeley.

"There seem to be biological mechanisms that limit diversification of new organisms and control which ones become successful enough to persist," he said. "Biodiversity is slow to recover after an extinction."

This apparent speed limit on the rate at which surviving organisms evolve and diversify has major implications for present-day extinctions.

"If we substantially diminish biodiversity on Earth, we can't expect the biosphere to just bounce back. It doesn't do that. The process of diversification is too slow," Kirchner said. "The planet would be biologically depleted for millions of years, with consequences extending not only beyond the lives of our children's children, but beyond the likely lifespan of the entire human species."

The paper by Kirchner appears in the Jan. 3, 2002, issue of the journal Nature.

Kirchner has been mining a fossil database created by the late University of Chicago paleontologist Jack Sepkoski, who catalogued the genera and families of fossil marine animals over the past 530 million years, from the Cambrian to the present. Using a technique called spectral analysis, Kirchner has looked for patterns in the rates at which new organisms appear or disappear.

Last year Kirchner and colleague Anne Weil reported that the Earth needs, on average, about 10 mill
'"/>

Contact: Robert Sanders
rls@pa.urel.berkeley.edu
510-643-6998
University of California - Berkeley
2-Jan-2002


Page: 1 2 3

Related biology news :

1. Inherent mistrust of research institutions limits minority representation
2. New OHSU lab will speed drug discovery process
3. Study suggests humans can speed evolution
4. Geologists discover water cuts through rock at surprising speed
5. Tiny tango: Device sorts microscopic particles with speed and precision
6. Scientists discover secret of dolphin speed
7. Researchers substitute whole chromosomes to speed the search for genes in common diseases
8. New proteomics core at OHSU will speed discovery process
9. UC Santa Barbara donates discovery to OneWorld Health that may speed disease treatment
10. New X-ray sources speed protein crystallography
11. Largest brain repair initiative in MS will speed strategies to restore nerve function

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/2/2020)... ... July 02, 2020 , ... ... publication detailing the use of its revolutionary NEXTGENPCR endpoint thermocycler to test ... 16 minutes. The article, titled "Ultra-fast one-step RT-PCR protocol for the detection ...
(Date:6/28/2020)... ... , ... In an upcoming episode scheduled for the fall of 2020, Advancements ... (POCT). Check local listings for more info. , Today, the majority of testing is ... labs throughout the country. Results are then available several days later. Now, in an ...
(Date:6/23/2020)... ... 2020 , ... The field of quantitation of large molecules or proteins has ... area. However, the use of mass spectrometry in this field has gained a lot ... do you choose which approach to use (LBA or MS)?” In many cases, ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... ... July 29, 2020 , ... Diversified ... systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. , ... one or two switches in a push-pull configuration; yielding fast fall time for ...
(Date:7/31/2020)... SAN FRANCISCO (PRWEB) , ... ... ... fast-growing provider of cloud-based software for the life sciences industry, today announced ... and presentation platform designed specifically for Medical Science Liaisons (MSLs) and other ...
(Date:7/18/2020)... ... July 17, 2020 , ... dicentra , a ... and food industries, is pleased to announce that Charles Galea has joined its ... , Charles is an accomplished and results-driven sales executive with over 10 years ...
(Date:7/7/2020)... ... July 06, 2020 , ... R3 International is now offering stem ... 200 million stem cells. Depending on the patient's condition, treatment may be offered IV, ... die having some form of Alzheimers dementia, and the incidence continues to increase as ...
Breaking Biology Technology:
Cached News: