Controls on body size during the Late Permian mass extinction event

He, W.-H, Twitchett, R.J, Zhang, Y, Shi, G.R, Feng, Q.L, Yu, J.-X, Wu, S.-B and Peng, X.-F 2010, Controls on body size during the Late Permian mass extinction event, Geobiology, vol. 8, no. 5, pp. 391-402.

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Title Controls on body size during the Late Permian mass extinction event
Author(s) He, W.-H
Twitchett, R.J
Zhang, Y
Shi, G.R
Feng, Q.L
Yu, J.-X
Wu, S.-B
Peng, X.-F
Journal name Geobiology
Volume number 8
Issue number 5
Start page 391
End page 402
Publisher Wiley-Blackwell Publishing Ltd.
Place of publication Oxford, England
Publication date 2010-12
ISSN 1472-4677
Summary This study examines the morphological responses of Late Permian brachiopods to environmental changes. Quantitative analysis of body size data from Permian–Triassic brachiopods has demonstrated significant, directional changes in body size before, during and after the Late Permian mass extinction event. Brachiopod size significantly reduced before and during the extinction interval, increased for a short time in more extinction-resistant taxa in the latter stages of extinction and then dramatically reduced again across the Permian ⁄ Triassic boundary. Relative abundances of trace elements and acritarchs demonstrate that the body size reductions which happened before, during and after extinction were driven by primary productivity collapse, whereas declining oxygen levels had less effect. An episode of size increase in two of the more extinction-resistant brachiopod species is unrelated to environmental change and possibly was the result of reduced interspecific competition for resources following the extinction of competitors. Based on the results of this study, predictions can be made for the possible responses of modern benthos to present-day environmental changes.
Language eng
Field of Research 040308 Palaeontology (incl Palynology)
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, Blackwell Publishing Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031974

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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