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Body-size changes of latest Permian brachiopods in varied palaeogeographic settings in South China and implications for controls on animal miniaturization in a highly stressed marine ecosystem
journal contribution
posted on 2017-11-01, 00:00 authored by W He, Guang ShiGuang Shi, Y Xiao, K Zhang, T Yang, H Wu, Y Zhang, B Chen, M Yue, J Shen, Y Wang, H Yang, S WuResearch on the dynamics of body-size changes in varied water depths can provide important insights into the evolution of palaeoenvironments through time. This paper attempts to investigate how the body sizes of two most commonly found chonetid brachiopod species in the uppermost Permian in South China varied with palaeo-bathymetry. The result shows that there is a broadly negative correlation between the latest Permian brachiopod body size and water depth. There is no simple singular variable that could explain this correlation because bathymetry is correlated, either linearly or nonlinearly, to food availability, redox condition and habitat temperature, as well as substrate conditions. Overall, we found that both oxygen and food availability played a more important role in controlling the differences of body sizes, and specifically several depressed factors (low food availability, anoxia, or abnormal temperature) have compounded and caused small body sizes in deeper waters during the latest Permian. We propose that the brachiopod miniaturization during the Permian-Triassic crisis in South China was collectively driven by anoxia, food restriction and high temperature.
History
Journal
Palaeogeography, palaeoclimatology, palaeoecologyVolume
486Pagination
33 - 45Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0031-0182Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2017, Elsevier B.VUsage metrics
Categories
Keywords
Science & TechnologyPhysical SciencesLife Sciences & BiomedicineGeography, PhysicalGeosciences, MultidisciplinaryPaleontologyPhysical GeographyGeologyBody sizesWater depthsOxygenFood availabilityPermian-Triassic crisisSOUTHWESTERN GUIZHOU PROVINCESHALLOW CARBONATE PLATFORMMASS EXTINCTIONTRIASSIC BOUNDARYRADIOLARIAN FAUNAORGANIC-CARBONREDOX CONDITIONSANOXIC EVENTENDSECTIONEvolutionary BiologyGeologyEcology
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