Phylogenetic correlates of extinction risk in mammals: species in older lineages are not at greater risk

Arregoitia, Luis Darcy Verde, Blomberg, Simon P. and Fisher, Diana O. (2013) Phylogenetic correlates of extinction risk in mammals: species in older lineages are not at greater risk. Proceedings of the Royal Society B: Biological Sciences, 280 1765: 20131092.1-20131092 .7. doi:10.1098/rspb.2013.1092

Author Arregoitia, Luis Darcy Verde
Blomberg, Simon P.
Fisher, Diana O.
Title Phylogenetic correlates of extinction risk in mammals: species in older lineages are not at greater risk
Journal name Proceedings of the Royal Society B: Biological Sciences   Check publisher's open access policy
ISSN 0962-8452
Publication date 2013-08-22
Sub-type Article (original research)
DOI 10.1098/rspb.2013.1092
Open Access Status Not yet assessed
Volume 280
Issue 1765
Start page 20131092.1
End page 20131092 .7
Total pages 7
Place of publication United Kingdom
Publisher The Royal Society Publishing
Language eng
Formatted abstract
Phylogenetic information is becoming a recognized basis for evaluating conservation priorities, but associations between extinction risk and properties of a phylogeny such as diversification rates and phylogenetic lineage ages remain unclear. Limited taxon-specific analyses suggest that species in older lineages are at greater risk. We calculate quantitative properties of the mammalian phylogeny and model extinction risk as an ordinal index based on International Union for Conservation of Nature Red List categories. We test for associations between lineage age, clade size, evolutionary distinctiveness and extinction risk for 3308 species of terrestrial mammals. We show no significant global or regional associations, and three significant relationships within taxonomic groups. Extinction risk increases for evolutionarily distinctive primates and decreases with lineage age when lemurs are excluded. Lagomorph species (rabbits, hares and pikas) that have more close relatives are less threatened. We examine the relationship between net diversification rates and extinction risk for 173 genera and find no pattern. We conclude that despite being under-represented in the frequency distribution of lineage ages, species in older, slower evolving and distinct lineages are not more threatened or extinction-prone. Their extinction, however, would represent a disproportionate loss of unique evolutionary history.
Keyword Ordinal index
Phylogenetic generalized linear mixed models
Phylogenetic age
IUCN Red List
Evolutionary history
Conservation prioritization
Ecological specialization
Australian marsupials
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
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