HOME >> BIOLOGY >> NEWS
Fossil records show biodiversity comes and goes

BERKELEY, CA -- A detailed and extensive new analysis of the fossil records of marine animals over the past 542 million years has yielded a stunning surprise. Biodiversity appears to rise and fall in mysterious cycles of 62 million years for which science has no satisfactory explanation. The analysis, performed by researchers with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley, has withstood thorough testing so that confidence in the results is above 99-percent.

"What we're seeing is a real and very strong signal that the history of life on our planet has been shaped by a 62 million year cycle, but nothing in present evolutionary theory accounts for it," said Richard Muller, a physicist who holds joint appointments with Berkeley Lab's Physics Division, and UC Berkeley's Physics Department. "While this signal has a huge presence in biodiversity, it can also be seen in both extinctions and originations."

Muller, and his grad student, Robert Rohde, presented their findings in the March 10, 2005 issue of the journal Nature. In a commentary on this research in that same issue of Nature, UC Berkeley professor of earth and planetary sciences, James Kirchner, stated, "It is often said that the best discoveries in science are those that raise more questions than they answer, and that is certainly the case here."

Muller and Rohde discovered the 62 million year fossil diversity cycle after creating a computerized version of an exhaustive database compiled by the late University of Chicago paleontologist Jack Sepkoski. Entitled Compendium of Fossil Marine Animal Genera, Sepkoski's posthumously published database is the most complete reference available for the study of biodiversity and extinctions. It covers the Phanerozoic eon, the past half billion years during which multicellular organisms left abundant fossil records in rocks; uses genera, the level above species i
'"/>

Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
14-Mar-2005


Page: 1 2 3

Related biology news :

1. Fossil DNA illuminates life
2. Fossil discovery marks earliest record of limbloss in ancient lizard
3. Fossils of ancient sea monster found in Montana
4. Fossil is missing link in elephant lineage
5. Fossilized liquid assembly: Nanomaterials research tool
6. Fossils pinpoint tropics as Earths most fruitful biodiversity spawning ground
7. Early bird caught the fish: Fossils depict aquatic origins of birds 115 million years ago
8. Fossil wood gives vital clues to ancient climates
9. Fossils tell the hole story of killer drillers and their prey
10. Fossil Patagonian plants show high insect feeding diversity 52 million years ago
11. UC researchers shatter world records with length of latest carbon nanotube arrays

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


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)... 16, 2017   Bridge Patient Portal , ... MD EMR Systems , an electronic medical ... GE, have established a partnership to build an ... the GE Centricity™ products, including Centricity Practice Solution ... These new integrations will allow healthcare delivery ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(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:10/11/2017)... ... October 11, 2017 , ... ... implantation and pregnancy rates in frozen and fresh in vitro fertilization (IVF) ... and maternal age to IVF success. , After comparing the results from the ...
Breaking Biology Technology:
Cached News: