Multiple drivers and lineage-specific insect extinctions during the Permo–Triassic

Corentin Jouault (), André Nel, Vincent Perrichot, Frédéric Legendre and Fabien L. Condamine ()
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Corentin Jouault: Sorbonne Université, EPHE, Université des Antilles
André Nel: Sorbonne Université, EPHE, Université des Antilles
Vincent Perrichot: Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118
Frédéric Legendre: Sorbonne Université, EPHE, Université des Antilles
Fabien L. Condamine: CNRS, UMR 5554 Institut des Sciences de l’Évolution de Montpellier, Place Eugène Bataillon

Nature Communications, 2022, vol. 13, issue 1, 1-16

Abstract: Abstract The Permo–Triassic interval encompasses three extinction events including the most dramatic biological crisis of the Phanerozoic, the latest Permian mass extinction. However, their drivers and outcomes are poorly quantified and understood for terrestrial invertebrates, which we assess here for insects. We find a pattern with three extinctions: the Roadian/Wordian (≈266.9 Ma; extinction of 64.5% insect genera), the Permian/Triassic (≈252 Ma; extinction of 82.6% insect genera), and the Ladinian/Carnian boundaries (≈237 Ma; extinction of 74.8% insect genera). We also unveil a heterogeneous effect of these extinction events across the major insect clades. Because extinction events have impacted Permo–Triassic ecosystems, we investigate the influence of abiotic and biotic factors on insect diversification dynamics and find that changes in floral assemblages are likely the strongest drivers of insects’ responses throughout the Permo–Triassic. We also assess the effect of diversity dependence between three insect guilds; an effect ubiquitously found in current ecosystems. We find that herbivores held a central position in the Permo–Triassic interaction network. Our study reveals high levels of insect extinction that profoundly shaped the evolutionary history of the most diverse non-microbial lineage.

Date: 2022
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DOI: 10.1038/s41467-022-35284-4

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