Nature and timing of biotic recovery in Antarctic benthic marine ecosystems following the Cretaceous-Paleogene mass extinction

Whittle, Rowan J. ORCID:; Witts, James D.; Bowman, Vanessa C.; Crame, J. Alistair ORCID:; Francis, Jane E.; Ineson, Jon. 2019 Nature and timing of biotic recovery in Antarctic benthic marine ecosystems following the Cretaceous-Paleogene mass extinction. Palaeontology, 62 (6). 919-934.

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© 2019 The Authors. Palaeontology published by John Wiley & Sons Ltd on behalf of The Palaeontological Association. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Taxonomic and ecological recovery from the Cretaceous–Palaeogene (K–Pg) mass extinction 66 million years ago shaped the composition and structure of modern ecosystems. The timing and nature of recovery has been linked to many factors including palaeolatitude, geographical range, the ecology of survivors, incumbency and palaeoenvironmental setting. Using a temporally constrained fossil dataset from one of the most expanded K–Pg successions in the world, integrated with palaeoenvironmental information, we provide the most detailed examination of the patterns and timing of recovery from the K–Pg mass extinction event in the high southern latitudes of Antarctica. The timing of biotic recovery was influenced by global stabilization of the wider Earth system following severe environmental perturbations, apparently regardless of latitude or local environment. Extinction intensity and ecological change were decoupled, with community scale ecological change less distinct compared to other locations, even if the taxonomic severity of the extinction was the same as at lower latitudes. This is consistent with a degree of geographical heterogeneity in the recovery from the K–Pg mass extinction. Recovery in Antarctica was influenced by local factors (such as water depth changes, local volcanism, and possibly incumbency and pre‐adaptation to seasonality of the local benthic molluscan population), and also showed global signals, for example the radiation of the Neogastropoda within the first million years of the Danian, and a shift in dominance between bivalves and gastropods.

Item Type: Publication - Article
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Additional Keywords: Mass extinction, Cretaceous, Paleogene, Antarctica, Recovery
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Date made live: 20 Jun 2019 13:18 +0 (UTC)

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