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Signature of the end-Cretaceous mass extinction in the modern biota.
Science. 2009 Feb 06; 323(5915):767-71.Sci

Abstract

The long-term effects of mass extinctions on spatial and evolutionary dynamics have been poorly studied. Here we show that the evolutionary consequences of the end-Cretaceous [Cretaceous/Paleogene (K/Pg)] mass extinction persist in present-day biogeography. The geologic ages of genera of living marine bivalves show a significant break from a smooth exponential distribution, corresponding to the K/Pg boundary. The break reflects a permanent increase in origination rates, intermediate between the Mesozoic rate and the post-extinction recovery pulse. This global rate shift is most clearly seen today in tropical bioprovinces and weakens toward the poles. Coupled with the modern geographic distributions of taxa originating before and after the K/Pg boundary, this spatial pattern indicates that tropical origination rates after the K/Pg event have left a permanent mark on the taxonomic and biogeographic structure of the modern biota, despite the complex Cenozoic history of marine environments.

Authors+Show Affiliations

Department of Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue Chicago, IL 60637, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

19197060

Citation

Krug, Andrew Z., et al. "Signature of the end-Cretaceous Mass Extinction in the Modern Biota." Science (New York, N.Y.), vol. 323, no. 5915, 2009, pp. 767-71.
Krug AZ, Jablonski D, Valentine JW. Signature of the end-Cretaceous mass extinction in the modern biota. Science. 2009;323(5915):767-71.
Krug, A. Z., Jablonski, D., & Valentine, J. W. (2009). Signature of the end-Cretaceous mass extinction in the modern biota. Science (New York, N.Y.), 323(5915), 767-71. https://doi.org/10.1126/science.1164905
Krug AZ, Jablonski D, Valentine JW. Signature of the end-Cretaceous Mass Extinction in the Modern Biota. Science. 2009 Feb 6;323(5915):767-71. PubMed PMID: 19197060.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Signature of the end-Cretaceous mass extinction in the modern biota. AU - Krug,Andrew Z, AU - Jablonski,David, AU - Valentine,James W, PY - 2009/2/7/entrez PY - 2009/2/7/pubmed PY - 2009/2/20/medline SP - 767 EP - 71 JF - Science (New York, N.Y.) JO - Science VL - 323 IS - 5915 N2 - The long-term effects of mass extinctions on spatial and evolutionary dynamics have been poorly studied. Here we show that the evolutionary consequences of the end-Cretaceous [Cretaceous/Paleogene (K/Pg)] mass extinction persist in present-day biogeography. The geologic ages of genera of living marine bivalves show a significant break from a smooth exponential distribution, corresponding to the K/Pg boundary. The break reflects a permanent increase in origination rates, intermediate between the Mesozoic rate and the post-extinction recovery pulse. This global rate shift is most clearly seen today in tropical bioprovinces and weakens toward the poles. Coupled with the modern geographic distributions of taxa originating before and after the K/Pg boundary, this spatial pattern indicates that tropical origination rates after the K/Pg event have left a permanent mark on the taxonomic and biogeographic structure of the modern biota, despite the complex Cenozoic history of marine environments. SN - 1095-9203 UR - https://www.unboundmedicine.com/medline/citation/19197060/Signature_of_the_end_Cretaceous_mass_extinction_in_the_modern_biota_ L2 - https://www.sciencemag.org/cgi/pmidlookup?view=long&pmid=19197060 DB - PRIME DP - Unbound Medicine ER -