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Good Genes and Good Luck: Ammonoid Diversity and the End-Permian Mass Extinction.

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Title: Good Genes and Good Luck: Ammonoid Diversity and the End-Permian Mass Extinction.
Authors: Brayard, Arnaud, Escarguel, Gilles, Bucher, Hugo, Monnet, Claude, Brühwiler, Thomas, Goudemand, Nicolas, Galfetti, Thomas, Guex, Jean
Source: Science (pre-March 2025). 8/28/2009, Vol. 325 Issue 5944, p1118-1121. 4p.
Subjects: Ammonoidea, Species diversity, Biological extinction, Fossil marine animals, Fossil cephalopoda, Permian paleoentomology, Triassic paleopedology, Benthos
Abstract: The end-Permian mass extinction removed more than 80% of marine genera. Ammonoid cephalopods were among the organisms most affected by this crisis. The analysis of a global diversity data set of ammonoid genera covering about 106 million years centered on the Permian-Triassic boundary (PTB) shows that Triassic ammonoids actually reached levels of diversity higher than in the Permian less than 2 million years after the PTB. The data favor a hierarchical rather than logistic model of diversification coupled with a niche incumbency hypothesis. This explosive and nondelayed diversification contrasts with the slow and delayed character of the Triassic biotic recovery as currently illustrated for other, mainly benthic groups such as i bivalves and gastropods. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Good Genes and Good Luck: Ammonoid Diversity and the End-Permian Mass Extinction.
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  Data: <searchLink fieldCode="AR" term="%22Brayard%2C+Arnaud%22">Brayard, Arnaud</searchLink><br /><searchLink fieldCode="AR" term="%22Escarguel%2C+Gilles%22">Escarguel, Gilles</searchLink><br /><searchLink fieldCode="AR" term="%22Bucher%2C+Hugo%22">Bucher, Hugo</searchLink><br /><searchLink fieldCode="AR" term="%22Monnet%2C+Claude%22">Monnet, Claude</searchLink><br /><searchLink fieldCode="AR" term="%22Brühwiler%2C+Thomas%22">Brühwiler, Thomas</searchLink><br /><searchLink fieldCode="AR" term="%22Goudemand%2C+Nicolas%22">Goudemand, Nicolas</searchLink><br /><searchLink fieldCode="AR" term="%22Galfetti%2C+Thomas%22">Galfetti, Thomas</searchLink><br /><searchLink fieldCode="AR" term="%22Guex%2C+Jean%22">Guex, Jean</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 8/28/2009, Vol. 325 Issue 5944, p1118-1121. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Ammonoidea%22">Ammonoidea</searchLink><br /><searchLink fieldCode="DE" term="%22Species+diversity%22">Species diversity</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+extinction%22">Biological extinction</searchLink><br /><searchLink fieldCode="DE" term="%22Fossil+marine+animals%22">Fossil marine animals</searchLink><br /><searchLink fieldCode="DE" term="%22Fossil+cephalopoda%22">Fossil cephalopoda</searchLink><br /><searchLink fieldCode="DE" term="%22Permian+paleoentomology%22">Permian paleoentomology</searchLink><br /><searchLink fieldCode="DE" term="%22Triassic+paleopedology%22">Triassic paleopedology</searchLink><br /><searchLink fieldCode="DE" term="%22Benthos%22">Benthos</searchLink>
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  Data: The end-Permian mass extinction removed more than 80% of marine genera. Ammonoid cephalopods were among the organisms most affected by this crisis. The analysis of a global diversity data set of ammonoid genera covering about 106 million years centered on the Permian-Triassic boundary (PTB) shows that Triassic ammonoids actually reached levels of diversity higher than in the Permian less than 2 million years after the PTB. The data favor a hierarchical rather than logistic model of diversification coupled with a niche incumbency hypothesis. This explosive and nondelayed diversification contrasts with the slow and delayed character of the Triassic biotic recovery as currently illustrated for other, mainly benthic groups such as i bivalves and gastropods. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=44090330
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      – SubjectFull: Biological extinction
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              Text: 8/28/2009
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