Navigation Links
Ancient marine invertebrate diversity less explosive than thought
Date:7/3/2008

Diversity among the ancestors of such marine creatures as clams, sand dollars and lobsters showed only a modest rise beginning 144 million years ago with no clear trend afterwards, according to an international team of researchers. This contradicts previous work showing dramatic increases beginning 248 million years ago and may shed light on future diversity.

"Some of the time periods in the past are analogies for what is happening today from global warming," says Jocelyn Sessa, doctoral candidate in geosciences, Penn State. "Understanding what happened with diversity in the past can help us provide some prediction on how modern organisms will fare. If we know where we have been, we know something about where it will go."

Using contemporary statistical methods and the Paleobiology Database, the researchers report, in today's (July 4) issue of Science, a new diversity curve that shows that most of the early spread of invertebrates took place well before the Late Cretaceous, and that the net increase through the period since, is proportionately small relative to the 65 million years that elapsed.

One key to the new curve is the Paleobiology Database, (http://paleodb.org) housed at the National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara. Previous research was based on databases of marine invertebrate fossils that recorded only the first occurrence of an organism and the last occurrence of the organism. There was no information in between for the organism.

"Over 30 years ago, researchers looked at the curve they had and considered that perhaps diversity did not increase at all," says Mark E. Patzkowsky, associate professor of geosciences. "What researchers saw was the diversity curve leveled off for quite some time and then took off exponentially. However, diversity results are strongly controlled by sampling techniques."

The new database allows researchers t
'/>"/>

Contact: Andrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Ancient oak trees help reduce global warming
2. Ancient Mexican maize varieties
3. Archaeologist uses satellite imagery to explore ancient Mexico
4. Ancient protein offers clues to killer condition
5. Ancient Nutcracker Man challenges ideas on evolution of human diet
6. Ancient sunflower fuels debate about agriculture in the Americas
7. Ancient ecosystems organized much like our own
8. Synchrotron light unveils oil in ancient Buddhist paintings from Bamiyan
9. Ancient DNA: reconstruction of the biological history of Aldaieta necropolis
10. Ancient reptile rises from Alberta oil sands
11. Ancient lemurs little finger poses mystery
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... to announce its new relationship with the International College ... will partner to publish International Journal of Neuropsychopharmacology ... , Alan Frazer, Editor-in-Chief of IJNP said, ... OUP will further facilitate the goal for the ... journals within neuropsychopharmacology. The conversion of the IJNP ...
(Date:7/30/2014)... team of biologists, led by Clemson University associate professor ... pest that will pave the way for novel anti-fouling ... for medical and industrial applications. , The team,s findings, ... the last larval stage of barnacles that attaches to ... possibly polymeric material that acts as an underwater heavy-duty ...
(Date:7/30/2014)... July 30, 2014 NexID Biometrics ... liveness detection solutions for the biometric authentication industry, ... consortium revolutionizing online authentication with standards for strong ... , "The decision to join FIDO Alliance stems ... pervasive in use. We believe the FIDO Alliance ...
Breaking Biology News(10 mins):OUP to partner with the International College of Neuropsychopharmacology 2Study: Marine pest provides advances in maritime anti-fouling and biomedicine 2NexID Biometrics Joins the FIDO Alliance 2
... PULLMAN, Wash. - Washington State University researchers have taken ... decoding the specific brain circuits involved in depression. By ... primary emotions, graduate student Jason Wright and his advisor ... associated with a depressed, negative mood, or affect. ...
... waters could compromise the ability of oysters and other ... to a new study led by University of Georgia ... November 2011 issue of Nature Geoscience . The ... by the Mississippi River to the northern Gulf of ...
... recent election, 21 new Fellows were inducted into ... Sunday, Oct.23, at ceremonies that followed the opening ... and Health Informatics, where about 2,500 informatics professionals ... sessions, and educational panels on topics including data ...
Cached Biology News:WSU researchers demonstrate rare animal model for studying depression 2Run-off, emissions deliver double whammy to coastal marine creatures, UGA study finds 221 Fellows inducted into American College of Medical Informatics 2
(Date:7/31/2014)... Colo. , July 31, 2014 ... awardee today with $25,000 to fund a translational ... inception in 2011, the gift was presented at ... Annual Meeting in Colorado Springs, ... specialize in neurointerventional approaches to neurovascular conditions, SNIS ...
(Date:7/31/2014)... 31, 2014 Rogne Bioscience, a privately-held biotechnology ... , has acquired a licence to anti-inflammatory peptides ... The potent anti-inflammatory activity of the peptides was discovered ... of Oxford,s Sir William Dunn School of ... over $1.5 million in seed financing, is developing a ...
(Date:7/31/2014)... (PRWEB) July 31, 2014 North Shore Towers, ... City, partnered with GI Energy, one of the nation’s leading ... $13 million upgrade of its 43-year-old CHP system. The original ... in an effort to extend the life of the plant, ... and associated electrical and heat recovery equipment, while maintaining continuous ...
(Date:7/31/2014)... , July 31, 2014 Research and ... "Global Genomics Market 2014-2018" report to their offering. ... Genomics is the study of the genetic material or ... a strong basis for the discovery and development of ... diseases or health conditions. Genomics is supported by three ...
Breaking Biology Technology:SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 3Oxford licenses anti-inflammatory peptides to San Francisco Bay Area start-up 2Oxford licenses anti-inflammatory peptides to San Francisco Bay Area start-up 3North Shore Towers Partners with GI Energy to Install Turnkey Natural Gas-Fired Combined Heat and Power Plant 2Global Genomics Market 2014-2018: Key Vendors are F. Hoffmann-La Roche, Life Technologies, Qiagen and Illumina 2
... , ... phosphorimeter integral to the SPEX FLUOROMAX -P or as an ... important information on various systems of chemical and biochemical interest, by revealing ... <P,>This Application Note describes an example, using the SPEX ...
... , ... Be sure that sensitivity calculations ... minimum signal-to-noise ratio (S/N) of 2500:1 for the FluoroMax . In ... no instrument was shipped with a S/N below 3000:1. Compare this to ...
... , ... Many companies claim high sensitivity ... of de-ionized water at 350 nm, which results in Raman emission ... This Raman-emission band of water is used, because the signal is ...
Cached Biology Technology:Phosphorescence lifetime measured using the SPEX phosphorimeter 2How to select the best spectrofluorometer 2Wideband sensitivity of the FluoroLog-3 2
...
... imaging system from Molecular Devices ... system for automated acquisition and analysis ... screening. ImageXpressULTRA is powered by ... screening acquisition, image storage and analysis. ...
The Saturn 2200 answers your GC/MS questions with the CP-3800 GC and the 2000 Series Ion Trap MS! These components create a platform for the worlds most versatile GC and flexible MS. Both deliver une...
... MG Phosphate Assay Kit is based on ... Malachite Green, molybdate and free orthophosphate. The ... be conveniently measured on a spectrophotometer (600-660 ... non-radioactive colorimetric assay kits have been optimized ...
Biology Products: