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Significant pre-mass extinction animal body-size changes : evidences from the Permian–Triassic boundary brachiopod faunas of South China

Zhang, Yang, Shi, G.R., He, Wie-hong, Wu, Hui-ting, Lei, Yong, Zhang, Ke-xin, Du, Cheng-chen, Yang, Ting-lu, Yue, Ming-liang and Xiao, Yi-fan 2016, Significant pre-mass extinction animal body-size changes : evidences from the Permian–Triassic boundary brachiopod faunas of South China, Palaeogeography, palaeoclimatology, palaeoecology, vol. 448, pp. 85-95, doi: 10.1016/j.palaeo.2015.11.020.

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Title Significant pre-mass extinction animal body-size changes : evidences from the Permian–Triassic boundary brachiopod faunas of South China
Author(s) Zhang, Yang
Shi, G.R.ORCID iD for Shi, G.R. orcid.org/0000-0002-5126-4036
He, Wie-hong
Wu, Hui-ting
Lei, Yong
Zhang, Ke-xin
Du, Cheng-chen
Yang, Ting-lu
Yue, Ming-liang
Xiao, Yi-fan
Journal name Palaeogeography, palaeoclimatology, palaeoecology
Volume number 448
Start page 85
End page 95
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-04-15
ISSN 0031-0182
Keyword(s) Permian–Triassic boundary
brachiopods
extinction
body-size change
South China
Summary This paper has undertaken a quantitative and statistical analysis of brachiopod body-size changes through the marine Permian–Triassic boundary section at Zhongzhai, Guizhou Province, South China, and found that (1) pre-mass extinction dwarfing is evident for at least the rugosochonetid species chosen for this study; (2) Tethyochonetes species reduced their size earlier than that in the Neochonetes species; and (3) no significant size reduction occurred in the newly evolved species of these two genera. Inter-species competition for resources between Neochonetes species and Tethyochonetes species and the reduction of food supply in the upper part of the uppermost Permian is here proposed to explain these observed stratigraphic patterns of brachiopod body-size changes throughout the Zhongzhai section. In the case of the newly evolved species showing no significant body-size change, morphological innovations (adaptations) in the process of speciation are considered to have significantly enhanced these newly evolved species' flexibility and survival in coping with degrading environmental conditions.
Language eng
DOI 10.1016/j.palaeo.2015.11.020
Field of Research 040308 Palaeontology (incl Palynology)
060305 Evolution of Developmental Systems
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081765

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