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Record 15 of 53
Modeling bivalve diversification: the effect of interaction on a macroevolutionary system
Author and Affiliation:
Miller, A. I.(University of Cincinnati, Department of Geology, Ohio 45221, United States)
Sepkoski, J. J. Jr
Sepkoski JJ, J. r. [Principal Investigator]
Abstract: The global diversification of the class Bivalvia has historically received two conflicting interpretations. One is that a major upturn in diversification was associated with, and a consequence of, the Lake Permian mass extinction. The other is that mass extinctions have had little influence and that bivalves have experienced slow but nearly steady exponential diversification through most of their history, unaffected by interactions with other clades. We find that the most likely explanation lies between these two interpretations. Through most of the Phanerozoic, the diversity of bivalves did indeed exhibit slow growth, which was not substantially altered by mass extinctions. However, the presence of "hyperexponential bursts" in diversification during the initial Ordovician radiation and following the Late Permian and Late Cretaceous mass extinctions suggests a more complex history in which a higher characteristic diversification rate was dampened through most of the Phanerozoic. The observed pattern can be accounted for with a two-phase coupled (i.e., interactive) logistic model, where one phase is treated as the "bivalves" and the other phase is treated as a hypothetical group of clades with which the "bivalves" might have interacted. Results of this analysis suggest that interactions with other taxa have substantially affected bivalve global diversity through the Phanerozoic.
Publication Date: Jan 01, 1988
Document ID:
20040120341
(Acquired Oct 05, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Paleobiology (ISSN 0094-8373); Volume 14; 4; 364-9
Publisher Information: United States
Contract/Grant/Task Num: NAG2-282
Financial Sponsor: NASA Ames Research Center; Moffett Field CA United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EVOLUTION; MODELS; MOLLUSKS; PALEONTOLOGY; CLASSIFICATIONS; EXOBIOLOGY; GEOLOGY; REGRESSION ANALYSIS
Other Descriptors: EVOLUTION; MODELS, BIOLOGICAL; MOLLUSCA/CLASSIFICATION; PALEONTOLOGY; ANIMALS; GEOLOGY; LOGISTIC MODELS; PHYLOGENY; SUPPORT, U.S. GOV'T, NON-P.H.S; NASA DISCIPLINE EXOBIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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