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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2023

Earth’s interior dynamics drive marine fossil diversity cycles of tens of millions of years

Résumé

The fossil record reveals that biotic diversity has fluctuated quasi-cyclically through geological time. However, the causal mechanisms of biotic diversity cycles remain unexplained. Here, we highlight a common, correlatable 36 ± 1 Myr (million years) cycle in the diversity of marine genera as well as in tectonic, sea-level, and macrostratigraphic data over the past 250 Myr of Earth history. The prominence of the 36 ± 1 Myr cycle in tectonic data favors a common-cause mechanism, wherein geological forcing mechanisms drive patterns in both biological diversity and the preserved rock record. In particular, our results suggest that a 36 ± 1 Myr tectono-eustatically driven sea-level cycle may originate from the interaction between the convecting mantle and subducting slabs, thereby pacing mantle-lithospheric deep-water recycling. The 36 ± 1 Myr tectono-eustatic driver of biodiversity is likely related to cyclic continental inundations, with expanding and contracting ecological niches on shelves and in epeiric seas.
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insu-04194975 , version 1 (05-01-2024)

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Slah Boulila, Shanan Peters, R. Dietmar Müller, Bilal Haq, Nathan Hara. Earth’s interior dynamics drive marine fossil diversity cycles of tens of millions of years. Proceedings of the National Academy of Sciences of the United States of America, 2023, 120 (29), ⟨10.1073/pnas.2221149120⟩. ⟨insu-04194975⟩
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