You are not logged in.

Size-frequency distributions along a latitudinal gradient in middle permian fusulinoideans

Zhang, Yichun and Payne, Jonathan L. 2012, Size-frequency distributions along a latitudinal gradient in middle permian fusulinoideans, PLoS One, vol. 7, no. 6, pp. 1-8.

Attached Files
Name Description MIMEType Size Downloads

Title Size-frequency distributions along a latitudinal gradient in middle permian fusulinoideans
Author(s) Zhang, Yichun
Payne, Jonathan L.
Journal name PLoS One
Volume number 7
Issue number 6
Start page 1
End page 8
Total pages 8
Publisher Public Library of Science
Place of publication San Francisco, Calif.
Publication date 2012-06-07
ISSN 1932-6203
Keyword(s) carbonic acid
dissolved oxygen
sea water
Summary Geographic gradients in body size within and among living species are commonly used to identify controls on the long-term evolution of organism size. However, the persistence of these gradients over evolutionary time remains largely unknown because ancient biogeographic variation in organism size is poorly documented. Middle Permian fusulinoidean foraminifera are ideal for investigating the temporal persistence of geographic gradients in organism size because they were diverse and abundant along a broad range of paleo-latitudes during this interval (~275–260 million years ago). In this study, we determined the sizes of Middle Permian fusulinoidean fossils from three different paleo-latitudinal zones in order to examine the relationship between the size of foraminifers and regional environment. We recovered the following results: keriothecal fusulinoideans are substantially larger than nonkeriothecal fusulinoideans; fusulinoideans from the equatorial zone are typically larger than those from the north and south transitional zones; neoschwagerinid specimens within a single species are generally larger in the equatorial zone than those in both transitional zones; and the nonkeriothecal fusulinoideans Staffellidae and Schubertellidae have smaller size in the north transitional zone. Fusulinoidean foraminifers differ from most other marine taxa in exhibiting larger sizes closer to the equator, contrary to Bergmann's rule. Meridional variation in seasonality, water temperature, nutrient availability, and carbonate saturation level are all likely to have favored or enabled larger sizes in equatorial regions. Temporal variation in atmospheric oxygen concentrations have been shown to account for temporal variation in fusulinoidean size during Carboniferous and Permian time, but oxygen availability appears unlikely to explain biogeographic variation in fusulinoidean sizes, because dissolved oxygen concentrations in seawater typically increase away from the equator due to declining seawater temperatures. Consequently, our findings highlight the fact that spatial gradients in organism size are not always controlled by the same factors that govern temporal trends within the same clade.
Language eng
Field of Research 040308 Palaeontology (incl Palynology)
060206 Palaeoecology
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Zhang, Payne
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL

Document type: Journal Article
Collections: School of Life and Environmental Sciences
Open Access Checking
Connect to link resolver
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in TR Web of Science
Scopus Citation Count Cited 5 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 41 Abstract Views, 2 File Downloads  -  Detailed Statistics
Created: Thu, 29 Nov 2012, 08:10:56 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact