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Modelling determinants of extinction across two Mesozoic hyperthermal events.
Proc Biol Sci. 2018 10 24; 285(1889)PB

Abstract

The Late Triassic and Early Toarcian extinction events are both associated with greenhouse warming events triggered by massive volcanism. These Mesozoic hyperthermals were responsible for the mass extinction of marine organisms and resulted in significant ecological upheaval. It has, however, been suggested that these events merely involved intensification of background extinction rates rather than significant shifts in the macroevolutionary regime and extinction selectivity. Here, we apply a multivariate modelling approach to a vast global database of marine organisms to test whether extinction selectivity varied through the Late Triassic and Early Jurassic. We show that these hyperthermals do represent shifts in the macroevolutionary regime and record different extinction selectivity compared to background intervals of the Late Triassic and Early Jurassic. The Late Triassic mass extinction represents a more profound change in selectivity than the Early Toarcian extinction but both events show a common pattern of selecting against pelagic predators and benthic photosymbiotic and suspension-feeding organisms, suggesting that these groups of organisms may be particularly vulnerable during episodes of global warming. In particular, the Late Triassic extinction represents a macroevolutionary regime change that is characterized by (i) the change in extinction selectivity between Triassic background intervals and the extinction event itself; and (ii) the differences in extinction selectivity between the Late Triassic and Early Jurassic as a whole.

Authors+Show Affiliations

School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK a.dunhill@leeds.ac.uk.Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Deutschland.School of Mathematics, University of Leeds, Leeds LS2 9JT, UK.OnCorps, Exeter House, Lower Station Approach, Temple Meads, Bristol BS1 6QS, UK.Department of Earth Sciences, Natural History Museum, London SW7 5BD, UK.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30355705

Citation

Dunhill, Alexander M., et al. "Modelling Determinants of Extinction Across Two Mesozoic Hyperthermal Events." Proceedings. Biological Sciences, vol. 285, no. 1889, 2018.
Dunhill AM, Foster WJ, Azaele S, et al. Modelling determinants of extinction across two Mesozoic hyperthermal events. Proc Biol Sci. 2018;285(1889).
Dunhill, A. M., Foster, W. J., Azaele, S., Sciberras, J., & Twitchett, R. J. (2018). Modelling determinants of extinction across two Mesozoic hyperthermal events. Proceedings. Biological Sciences, 285(1889). https://doi.org/10.1098/rspb.2018.0404
Dunhill AM, et al. Modelling Determinants of Extinction Across Two Mesozoic Hyperthermal Events. Proc Biol Sci. 2018 10 24;285(1889) PubMed PMID: 30355705.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modelling determinants of extinction across two Mesozoic hyperthermal events. AU - Dunhill,Alexander M, AU - Foster,William J, AU - Azaele,Sandro, AU - Sciberras,James, AU - Twitchett,Richard J, Y1 - 2018/10/24/ PY - 2018/02/21/received PY - 2018/10/08/accepted PY - 2018/10/26/entrez PY - 2018/10/26/pubmed PY - 2019/8/15/medline KW - Mesozoic KW - hyperthermal KW - mass extinction KW - modelling KW - palaeoecology JF - Proceedings. Biological sciences JO - Proc Biol Sci VL - 285 IS - 1889 N2 - The Late Triassic and Early Toarcian extinction events are both associated with greenhouse warming events triggered by massive volcanism. These Mesozoic hyperthermals were responsible for the mass extinction of marine organisms and resulted in significant ecological upheaval. It has, however, been suggested that these events merely involved intensification of background extinction rates rather than significant shifts in the macroevolutionary regime and extinction selectivity. Here, we apply a multivariate modelling approach to a vast global database of marine organisms to test whether extinction selectivity varied through the Late Triassic and Early Jurassic. We show that these hyperthermals do represent shifts in the macroevolutionary regime and record different extinction selectivity compared to background intervals of the Late Triassic and Early Jurassic. The Late Triassic mass extinction represents a more profound change in selectivity than the Early Toarcian extinction but both events show a common pattern of selecting against pelagic predators and benthic photosymbiotic and suspension-feeding organisms, suggesting that these groups of organisms may be particularly vulnerable during episodes of global warming. In particular, the Late Triassic extinction represents a macroevolutionary regime change that is characterized by (i) the change in extinction selectivity between Triassic background intervals and the extinction event itself; and (ii) the differences in extinction selectivity between the Late Triassic and Early Jurassic as a whole. SN - 1471-2954 UR - https://www.unboundmedicine.com/medline/citation/30355705/Modelling_determinants_of_extinction_across_two_Mesozoic_hyperthermal_events_ L2 - https://royalsocietypublishing.org/doi/10.1098/rspb.2018.0404?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -