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Environmental drivers of crocodyliform extinction across the Jurassic/Cretaceous transition

Tennant, JP; Mannion, PD; Upchurch, P; (2016) Environmental drivers of crocodyliform extinction across the Jurassic/Cretaceous transition. Proceedings of The Royal Society B , 283 (1826) , Article 20152840. 10.1098/rspb.2015.2840. Green open access

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Abstract

Crocodyliforms have a much richer evolutionary history than represented by their extant descendants, including several independent marine and terrestrial radiations during the Mesozoic. However, heterogeneous sampling of their fossil record has obscured their macroevolutionary dynamics, and obfuscated attempts to reconcile external drivers of these patterns. Here, we present a comprehensive analysis of crocodyliform biodiversity through the Jurassic/Cretaceous (J/K) transition using subsampling and phylogenetic approaches and apply maximum-likelihood methods to fit models of extrinsic variables to assess what mediated these patterns. A combination of fluctuations in sea-level and episodic perturbations to the carbon and sulfur cycles was primarily responsible for both a marine and non-marine crocodyliform biodiversity decline through the J/K boundary, primarily documented in Europe. This was tracked by high extinction rates at the boundary and suppressed origination rates throughout the Early Cretaceous. The diversification of Eusuchia and Notosuchia likely emanated from the easing of ecological pressure resulting from the biodiversity decline, which also culminated in the extinction of the marine thalattosuchians in the late Early Cretaceous. Through application of rigorous techniques for estimating biodiversity, our results demonstrate that it is possible to tease apart the complex array of controls on diversification patterns in major archosaur clades.

Type: Article
Title: Environmental drivers of crocodyliform extinction across the Jurassic/Cretaceous transition
Open access status: An open access version is available from UCL Discovery
DOI: 10.1098/rspb.2015.2840
Publisher version: http://doi.org/10.1098/rspb.2015.2840
Language: English
Additional information: © 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Keywords: Science & Technology, Life Sciences & Biomedicine, Biology, Ecology, Evolutionary Biology, Life Sciences & Biomedicine - Other Topics, Environmental Sciences & Ecology, Crocodylomorpha, Neosuchia, Notosuchia, Thalattosuchia, shareholder quorum subsampling, phylogenetic diversity estimate, SEA-LEVEL CHANGE, FOSSIL RECORD, MARINE, EVOLUTION, DIVERSITY, HISTORY, DIVERSIFICATION, BIODIVERSITY, ORIGINATION, MESOEUCROCODYLIA
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1513263
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