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

Brayard, Arnaud; Escarguel, Gilles; Bucher, Hugo; Monnet, Claude; Brühwiler, Thomas; Goudemand, Nicolas; Galfetti, Thomas; Guex, Jean

doi:10.1126/science.1174638

Cited by 254 publications

(256 citation statements)

References 27 publications

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“…The present diversity results also highlight that at least at the scale of the NIM, the highly dynamical recovery pattern with ups and downs, support previous hypotheses of a rapid global ammonoid rediversification briefly interrupted by several extinctions events (e.g. middle Dienerian, end Smithian; see Brayard et al, 2006Brayard et al, , 2009. Similarly detailed studies and additional sampling effort in other provinces would be necessary to enhance the quality of global correlations in order to test whether the diversity dynamics established here really constitute a global signal.…”

Section: Accepted M Manuscriptsupporting

confidence: 77%

“…An additional analysis at the genus level was performed, including the generic richness and the corresponding originations, extinctions and turnovers. These results were completed with a poly-cohort analysis (Raup, 1978(Raup, , 1986Foote, 1988;Hartenberger, 1988;Brayard et al, 2009). Finally, the respective contribution of each family to species richness (both in absolute and relative values) was computed.…”

Section: Diversity Dynamicsmentioning

confidence: 99%

“…Ammonoids have been documented to be one of the fastest clades to recover and even to largely overshoot their previous Permian record highs (Brayard et al, 2009). At the genus level, ammonoids show a low diversity in the Griesbachian, a slight increase during the Dienerian and an explosive radiation in the early Smithian (Brayard et al, 2006(Brayard et al, , 2009. Such a pattern provides the general outline of diversity trends, but is also influenced by uneven taxonomical practices across authors, relatively coarse time bins and the absence of consensus about some stage and sub-stage boundaries (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-resolution biochronology and diversity dynamics of the Early Triassic ammonoid recovery: The Dienerian faunas of the Northern Indian Margin

Ware

Bucher

Brayard

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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A new high resolution biozonation based on the Unitary Association (UA) method is constructed for the Dienerian ammonoid succession of the Northern Indian Margin. It includes 12 UA-zones and leads to the subdivision of the Dienerian into three parts (early, middle and late). The corresponding diversity analyses, coupled with results previously obtained for the early Smithian ammonoids of the same regions, highlight the four following phases: (1) a first modest peak of diversity in the earlyDienerian; (2) a very low diversity persisting throughout the middle Dienerian; (3) a slow increase of diversity during the late Dienerian, and (4) a marked diversification in the early Smithian. Turnover rates are very high during this entire time interval, and the boundaries between early-middle and middle-late Dienerian are emphasized by complete renewals of the ammonoid faunas. The low diversity values in the middle and early late Dienerian are concomitant with an anoxic event on outer continental shelves and coincide with warmer temperatures than those of the early Dienerian and early Smithian. This diversity pattern stands in strong contrast with the credo of a protracted or stepwise recovery following the end-Permian mass extinction. Together with the end-Smithian extinction, the middle and early late Dienerian diversity crises were likely both radical setbacks in the recovery of Early Triassic ammonoids. However, these two diversity crises do not necessarily imply identical environmental triggers that ultimately led to anoxic bottom waters on outer continental platforms in both cases.

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Section: Accepted M Manuscriptsupporting

confidence: 77%

Section: Diversity Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-resolution biochronology and diversity dynamics of the Early Triassic ammonoid recovery: The Dienerian faunas of the Northern Indian Margin

Ware

Bucher

Brayard

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…However, whether the temperature increase leads, is synchronous with, or postdates the extinction is not yet known with sufficient precision. Although recovery and diversification in Ammonoids began in the earliest Triassic, the broad effects of this short-lived extinction or ecological restructuring persist for 5-10 My after the main extinction interval, emphasizing the evolutionary irreversibility of the event (38)(39)(40)(41).…”

Section: Discussionmentioning

confidence: 99%

High-precision timeline for Earth’s most severe extinction

Burgess

Bowring

Shen

2014

Proc. Natl. Acad. Sci. U.S.A.

608

479

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Significance Mass extinctions are major drivers of macroevolutionary change and mark fundamental transitions in the history of life, yet the feedbacks between environmental perturbation and biological response, which occur on submillennial timescales, are poorly understood. We present a high-precision age model for the end-Permian mass extinction, which was the most severe loss of marine and terrestrial biota in the last 542 My, that allows exploration of the sequence of events at millennial to decamillenial timescales 252 Mya. This record is critical for a better understanding of the punctuated nature and duration of the extinction, the reorganization of the carbon cycle, and a refined evaluation of potential trigger and kill mechanisms.

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“…Habár a jelenlegi adat bázis-alapú tanulmányok fokozatos diverzitáscsökke nésről számol -nak be mindkét csoport esetében (BRAYARD et al 2009, ORCHARD 2010, az esemény értelmezése az elő fordu lás-alapú Paleobiology Database segítségével mind eddig nem történt meg, így feltehető, hogy a háttérhez ké pest megemelkedett kihalások (különösen az ammoniteszek esetében) a SignorLipps hatás miatt (SIGNOR & LIPPS 1982) nem mutathatóak ki.…”

Section: Változások Az éLővilágbanunclassified

A triász és a jura időszak határán lezajlott globális krízis és annak nyomai magyarországi rétegsorokban

Haas¹,

Pálfy²,

Győri³

et al. 2018

Földt. Közl.

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BevezetésA földtani kutatások eredményeként régóta tudjuk, hogy voltak a Föld történetében olyan, viszonylag rövid idejű környezeti krízisek, amelyek az élővilág igen jelentős megváltozását eredményezték, amikor tömegesen haltak ki fajok, nemzetségek, sőt a szervezetek nagyobb csoportjai is. Ezek a krízisek nemegyszer döntően megváltoztatták az élővilág fejlődésének további menetét. Bolygónk történetét szakaszokra tagolják és ily módon a földtörténetben mér -föld köveknek tekinthetők. Azt, hogy az ősmaradvány-együt tesekben hirtelen, jelentős változások vannak már a 19. század első felében felismerték. Ezeknél a változásoknál vonták meg a földtörténeti időszakok határát és az 1820-1840 között elnevezett időszakok (pl.: szilur, devon, triász, jura, kréta) máig érvényben vannak. 1841-ben John PHILLIPS javasolta az állatvilág fejlettségén alapuló tagolást, megalkot va a paleozoikum, mezozoikum és kainozoikum ter minusokat (MORRELL 2001).A földtörténet legutolsó, mintegy fél milliárd évének leg nagyobb tömeges kihalási eseményeit RAUP & SEPKOSKI (1982) az ősmaradvány anyag korszerű elemzésével mutatta ki. A kihalási ráta változásait ábrázoló diagramjukon öt feltűnő kihalási csúcs jelentkezik: az ordovícium végén, a ké -ső-devonban, a perm végén, a triász végén és a kréta végén. Az öt legnagyobb közt van a tehát a paleozoikum-mezozoikum és a mezozoikum-kainozoikum határa is. Ez jól mutatja, hogy az élővilág összetételének változásai ezeknél a fordulópontoknál olyan erőteljesek voltak, hogy azokat a rétegtan kialakulásának hajnalán is felismerhették a réteg -sorok tagolásán fáradozó kutatók. ALVAREZ et al. (1980) 148/1, 9-26., Budapest, 2018 Global crisis at the Triassic-Jurassic boundary and its stratigraphic record in Hungary AbstractThe mass extinction at the end of the Triassic Period was one of the largest extinction events in the Phanerozoic and it was the result of a global environmental crisis. In connection with this, the last two decades have seen increasing research efforts to gain more knowledge and thus a better understanding of this event. These efforts have included detailed studies of numerous stratigraphic sections worldwide. The review presented here attempts to summarize the major results of multi-faceted international research on the stratigraphic and fossil record of the end-Triassic event, discussing proposed cause-and-effect relationships and possible scenarios. In addition, there is also an overview of studies made in recent decades on the Triassic-Jurassic boundary sections in Hungary, with an emphasis on their relevance to global research into the Triassic-Jurassic boundary.Keywords: global environmental crisis, mass extinction, Triassic-Jurassic boundary Összefoglalás A triász időszakot lezáró tömeges kihalás egyike a fanerozoikum legnagyobb kihalási eseményeinek, amelyet globális környezeti krízis idézhetett elő. Kutatása az elmúlt két évtizedben vált intenzívvé és azóta szerte a világon, számos szelvény részletes vizsgálatával folyik. A szemle jellegű cikk célja a környezeti krízis kőz...

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

Cited by 254 publications

References 27 publications

High-resolution biochronology and diversity dynamics of the Early Triassic ammonoid recovery: The Dienerian faunas of the Northern Indian Margin

High-resolution biochronology and diversity dynamics of the Early Triassic ammonoid recovery: The Dienerian faunas of the Northern Indian Margin

High-precision timeline for Earth’s most severe extinction

A triász és a jura időszak határán lezajlott globális krízis és annak nyomai magyarországi rétegsorokban

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