Selective extinction among Early Jurassic bivalves: A consequence of anoxia

Abstract

Research Article| December 01, 2003 Selective extinction among Early Jurassic bivalves: A consequence of anoxia Martin Aberhan; Martin Aberhan 1Museum für Naturkunde, Institut für Paläontologie, Invalidenstrasse 43, D-10115 Berlin, Germany Search for other works by this author on: GSW Google Scholar Tomasz K. Baumiller Tomasz K. Baumiller 2Instytut Paleobiologii, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland, and Museum of Paleontology, University of Michigan, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (12): 1077–1080. https://doi.org/10.1130/G19938.1 Article history received: 13 Jun 2003 rev-recd: 07 Aug 2003 accepted: 14 Aug 2003 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Martin Aberhan, Tomasz K. Baumiller; Selective extinction among Early Jurassic bivalves: A consequence of anoxia. Geology 2003;; 31 (12): 1077–1080. doi: https://doi.org/10.1130/G19938.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Analyses of taxonomically standardized data sets demonstrate several statistically robust extinction patterns in Early Jurassic bivalve species from northwest Europe and the Andean basins of South America. In both regions, extinction intensities were significantly enhanced in late Pliensbachian and early Toarcian time as compared to all other time intervals. The same intervals (except for the early Toarcian of South America) also represent times of unusual extinction selectivity, with infaunal taxa suffering distinctly more than epifaunal forms. As infaunal suspension feeders are extremely rare components of Early Jurassic oxygen-controlled macrofaunas, these results are entirely compatible with sedimentological and geochemical data suggesting that widespread anoxia was a principal cause of the diversity crisis. Although many biotic traits that enhance survivorship during background times seem to be irrelevant during major mass extinctions, patterns of survivorship selectivity may provide more distinct clues to the causes of less severe mass extinctions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.