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dc.contributor.author
Hagen, Oskar
dc.contributor.author
Hartmann, Klaas
dc.contributor.author
Steel, Mike
dc.contributor.author
Stadler, Tanja
dc.date.accessioned
2019-12-05T10:25:44Z
dc.date.available
2017-06-11T19:11:03Z
dc.date.available
2019-12-05T10:25:44Z
dc.date.issued
2015-05
dc.identifier.other
10.1093/sysbio/syv001
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/103872
dc.identifier.doi
10.3929/ethz-b-000103872
dc.description.abstract
Tens of thousands of phylogenetic trees, describing the evolutionary relationships between hundreds of thousands of taxa, are readily obtainable from various databases. From such trees, inferences can be made about the underlying macroevolutionary processes, yet remarkably these processes are still poorly understood. Simple and widely used evolutionary null models are problematic: Empirical trees show very different imbalance between the sizes of the daughter clades of ancestral taxa compared to what models predict. Obtaining a simple evolutionary model that is both biologically plausible and produces the imbalance seen in empirical trees is a challenging problem, to which none of the existing models provide a satisfying answer. Here we propose a simple, biologically plausible macroevolutionary model in which the rate of speciation decreases with species age, whereas extinction rates can vary quite generally. We show that this model provides a remarkable fit to the thousands of trees stored in the online database TreeBase. The biological motivation for the identified age-dependent speciation process may be that recently evolved taxa often colonize new regions or niches and may initially experience little competition. These new taxa are thus more likely to give rise to further new taxa than a taxon that has remained largely unchanged and is, therefore, well adapted to its niche. We show that age-dependent speciation may also be the result of different within-species populations following the same laws of lineage splitting to produce new species. As the fit of our model to the tree database shows, this simple biological motivation provides an explanation for a long standing problem in macroevolution.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/4.0/
dc.subject
Birth-death process
en_US
dc.subject
Diversification
en_US
dc.subject
Macroevolution
en_US
dc.subject
Stochastic Models
en_US
dc.title
Age-Dependent Speciation Can Explain the Shape of Empirical Phylogenies
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 4.0 International
dc.date.published
2015-02-08
ethz.journal.title
Systematic Biology
ethz.journal.volume
64
en_US
ethz.journal.issue
3
en_US
ethz.pages.start
432
en_US
ethz.pages.end
440
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.nebis
000650857
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02060 - Dep. Biosysteme / Dep. of Biosystems Science and Eng.::09490 - Stadler, Tanja / Stadler, Tanja
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02060 - Dep. Biosysteme / Dep. of Biosystems Science and Eng.::09490 - Stadler, Tanja / Stadler, Tanja
ethz.date.deposited
2017-06-11T19:12:07Z
ethz.source
ECIT
ethz.identifier.importid
imp593653715d88121522
ethz.ecitpid
pub:162411
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T13:57:23Z
ethz.rosetta.lastUpdated
2019-12-05T10:25:56Z
ethz.rosetta.versionExported
true
ethz.COinS
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