Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/88136
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Ammonoid diversity and disparity track episodes of chaotic carbon cycling during the early Mesozoic |
Author: | Whiteside, J. Ward, P. |
Citation: | Geology (Boulder), 2011; 39(2):99-102 |
Publisher: | Geological Society of America |
Issue Date: | 2011 |
ISSN: | 0091-7613 0091-7613 |
Statement of Responsibility: | Jessica H. Whiteside and Peter D. Ward |
Abstract: | Episodes of mass extinction represent the largest events of biodiversity loss known in the geologic record, and may provide tests of biodiversity-ecosystem stability hypotheses. Here we present the first correlation between ammonoid diversity and disparity and ecosystem stability as represented by stable carbon isotopic records spanning the end-Permian through end-Triassic mass extinctions. Ammonoid generic richness from a single biogeographic realm shows that nearly all taxa disappeared coincident with major carbon isotopic shifts to lighter values. The intervals following these two major mass extinctions were characterized by multiple positive-negative couplets of chaotic carbon cycling and were composed of low-richness ammonoid faunas characterized by higher proportions of passively floating, non-swimming morphotypes than before or after. In contrast, richness was highest during intervals of stable carbon isotope values. We propose that these “chaotic carbon episodes” reflect the breakdown of functional redundancy in the ecosystem, and that the post-extinction carbon cycle did not stabilize until redundancy was restored. |
Rights: | © 2011 Geological Society of America |
DOI: | 10.1130/G31401.1 |
Published version: | http://dx.doi.org/10.1130/g31401.1 |
Appears in Collections: | Aurora harvest 2 Geology & Geophysics publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.