A test of whether rates of speciation were unusually high during the Cambrian radiation (Record no. 41203)

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control field 20250625124650.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-6865
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Title A test of whether rates of speciation were unusually high during the Cambrian radiation
490 0# - SERIES STATEMENT
Volume/sequential designation Procciding of the Royal Society London B, 268, p.1707-1714, 2001
520 3# - SUMMARY, ETC.
Summary, etc. The Cambrian radiation represents an interval when nearly 20 animal phyla appear in the fossil record in a short geological time span; however, whether this radiation also represents a period of extremely rapid speciation remains unclear. Here, a stochastic framework is used to test the null hypothesis that diversity changes in one of the dominant Early Cambrian groups, the olenelloid trilobites, could be produced by tempos of speciation known to have operated during later time periods. Two continuoustime models, the Yule model and the birth and death process model, and one discrete-time model, the Bienayme¨ ^Galton^Watson branching process model, were used. No statistical evidence for uniquely high rates of speciation during the radiation in these trilobites was found when the continuous-time models were used with low or moderate extinction rates, the rates typically associated with the Cambrian radiation, although the p values are fairly low or, in one case, signi¢cant when high extinction rates were used. However, rates of speciation were higher than the average Phanerozoic rates of peciation. The discretetime model produced equivocal results: either rates were unusually high or the model is inapplicable during the Cambrian radiation.This suggests that there was nothing unique about evolutionary processes relating to the tempo of speciation during the Cambrian radiation.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CAMBRIAN RADIATION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element SPECIATION RATES
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element STOCHASTIC FRAMEWORK
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element TRILOBITES
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Lieberman, B.S.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/10iF82jaaYov95ZzzZ9ArxlpUKE_f_SW1/view?usp=drivesdk">https://drive.google.com/file/d/10iF82jaaYov95ZzzZ9ArxlpUKE_f_SW1/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-6865 25.06.2025 25.06.2025 Documentos solicitados