Article (Scientific journals)
What is the best way to measure extinction? A reflection from the palaeobotanical record
Cascales - Miñana, Borja; Cleal, Christopher J.; Diez, José B.
2013In Earth-Science Reviews, 124, p. 126-147
Peer Reviewed verified by ORBi
 

Files


Full Text
What is the best way to measure extinction, a reflection from the palaeobotanical record.pdf
Publisher postprint (4.07 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Diversity fluctuations; Evolutionary success; Extinction metrics; Plant fossils; Sampling bias; Spermatophyta; Tracheophyta
Abstract :
[en] Documenting extinction phenomena remains a vital topic in palaeontology, especially in the context of the marine fossil record. It has been widely assumed that the methods that have been developed in these studies are of universal application throughout palaeontology, but there have been few attempts to test them with plant fossils. We explored the adequacy of the most common methods for documenting extinction events and the associated loss of diversity through time by exploring the monographic knowledge of tracheophytes, especially the record of non-flowering seed-plants. The measure of extinctions was addressed by evaluating diversity fluctuations and the corresponding sampling biases, by measuring levels of taxonomic extinctions, and by exploring disruptions to similarity patterns between time units. Results revealed a strong relationship between diversity and sampling effort based on various different sampling proxies. This suggests that it is vital to take into account the effect of sampling bias when trying to use palaeobotanical diversity dynamics to quantify the real scale of extinction. After testing 16 metrics in two different temporal frameworks, by using criteria like the adjustment between the descriptive extinction metric and the derived probabilistic profile, the interpretation of extinction intensity was overall improved by using normalized metrics that discounted short-lived taxa. Results also revealed that sample size has a significant effect on such analyses and must be evaluated independently for each study before data interpretation. Complementarily, the results showed how the main disturbances of diversity curves generally attributed to extinction events are reflected as abrupt reductions of similarity coefficients between successive time units, which are clearly revealed using clustering methods. © 2013.
Disciplines :
Life sciences: Multidisciplinary, general & others
Author, co-author :
Cascales - Miñana, Borja ;  AMAP (Botanique et Bioinformatique de l’Architecture des Plantes), UMR 5120 CNRS-CIRAD, F-34398 Montpellier Cedex 5, France
Cleal, Christopher J.;  Department of Biodiversity and Systematic Biology, National Museum Wales, Cathays Park, Cardiff CF10 3NP, United Kingdom
Diez, José B.;  Departamento de Xeociencias Mariñas e Ordenación do Territorio, Facultade de Ciencias do Mar, Universidade de Vigo, 36310 Vigo, Spain
Language :
English
Title :
What is the best way to measure extinction? A reflection from the palaeobotanical record
Publication date :
2013
Journal title :
Earth-Science Reviews
ISSN :
0012-8252
eISSN :
1872-6828
Publisher :
Elsevier, Netherlands
Volume :
124
Pages :
126-147
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 January 2015

Statistics


Number of views
43 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
27
Scopus citations®
without self-citations
12
OpenCitations
 
21

Bibliography


Similar publications



Contact ORBi