SMILE

Stochastic Models for the Inference of Life Evolution

Phylogenies support out-of-equilibrium models of biodiversity

Manceau, M., Lambert, A., Morlon, H.

Ecology Letters

2015

There is a long tradition in ecology of studying models of biodiversity at equilibrium. These models, including the influential Neutral Theory of Biodiversity, have been successful at predicting major macroecological patterns, such as species abundance distributions. But they have failed to predict macroevolutionary patterns, such as those captured in phylogenetic trees. Here, we develop a model of biodiversity in which all individuals have identical demographic rates, metacommunity size is allowed to vary stochastically according to population dynamics, and speciation arises naturally from the accumulation of point mutations. We show that this model generates phylogenies matching those observed in nature if the metacommunity is out of equilibrium. We develop a likelihood inference framework that allows fitting our model to empirical phylogenies, and apply this framework to various mammalian families. Our results corroborate the hypothesis that biodiversity dynamics are out of equilibrium.

Bibtex

@article{manceau_phylogenies_2015,
Author = {Manceau, Marc and Lambert, Amaury and Morlon, Hélène},
Title = {Phylogenies support out-of-equilibrium models of
biodiversity},
Journal = {Ecology Letters},
Volume = {18},
Number = {4},
Pages = {347--356},
Keywords = {Birth-death models, Diversification, Extinction,
Macroevolution, Metacommunity dynamics, Neutral
Biodiversity Theory, Speciation, Speciation by Genetic
Differentiation},
abstract = {There is a long tradition in ecology of studying
models of biodiversity at equilibrium. These models,
including the influential Neutral Theory of
Biodiversity, have been successful at predicting major
macroecological patterns, such as species abundance
distributions. But they have failed to predict
macroevolutionary patterns, such as those captured in
phylogenetic trees. Here, we develop a model of
biodiversity in which all individuals have identical
demographic rates, metacommunity size is allowed to
vary stochastically according to population dynamics,
and speciation arises naturally from the accumulation
of point mutations. We show that this model generates
phylogenies matching those observed in nature if the
metacommunity is out of equilibrium. We develop a
likelihood inference framework that allows fitting our
model to empirical phylogenies, and apply this
framework to various mammalian families. Our results
corroborate the hypothesis that biodiversity dynamics
are out of equilibrium.},
copyright = {© 2015 John Wiley \& Sons Ltd/CNRS},
doi = {10.1111/ele.12415},
issn = {1461-0248},
language = {en},
month = apr,
url = {http://onlinelibrary.wiley.com/doi/10.1111/ele.12415/abstract},
urldate = {2015-03-26},
year = 2015
}

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