Publication Date:
2008-07-05
Description:
It has previously been thought that there was a steep Cretaceous and Cenozoic radiation of marine invertebrates. This pattern can be replicated with a new data set of fossil occurrences representing 3.5 million specimens, but only when older analytical protocols are used. Moreover, analyses that employ sampling standardization and more robust counting methods show a modest rise in diversity with no clear trend after the mid-Cretaceous. Globally, locally, and at both high and low latitudes, diversity was less than twice as high in the Neogene as in the mid-Paleozoic. The ratio of global to local richness has changed little, and a latitudinal diversity gradient was present in the early Paleozoic.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alroy, John -- Aberhan, Martin -- Bottjer, David J -- Foote, Michael -- Fursich, Franz T -- Harries, Peter J -- Hendy, Austin J W -- Holland, Steven M -- Ivany, Linda C -- Kiessling, Wolfgang -- Kosnik, Matthew A -- Marshall, Charles R -- McGowan, Alistair J -- Miller, Arnold I -- Olszewski, Thomas D -- Patzkowsky, Mark E -- Peters, Shanan E -- Villier, Loic -- Wagner, Peter J -- Bonuso, Nicole -- Borkow, Philip S -- Brenneis, Benjamin -- Clapham, Matthew E -- Fall, Leigh M -- Ferguson, Chad A -- Hanson, Victoria L -- Krug, Andrew Z -- Layou, Karen M -- Leckey, Erin H -- Nurnberg, Sabine -- Powers, Catherine M -- Sessa, Jocelyn A -- Simpson, Carl -- Tomasovych, Adam -- Visaggi, Christy C -- New York, N.Y. -- Science. 2008 Jul 4;321(5885):97-100. doi: 10.1126/science.1156963.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Ecological Analysis and Synthesis, University of California-Santa Barbara, 735 State Street, Santa Barbara, CA 93101, USA. alroy@nceas.ucsb.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18599780" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Biodiversity
;
Biological Evolution
;
Databases, Factual
;
Environment
;
*Fossils
;
Geography
;
Geologic Sediments
;
*Invertebrates/classification
;
*Paleontology/methods
;
Population Dynamics
;
Sampling Studies
;
Seawater
;
Time Factors
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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