The Phylogenetic Limits to Diversity-Dependent Diversification
Por:
Etienne, Rampal S., Haegeman, Bart, Dugo-Cota, Alvaro, Vila, Carles, Gonzalez-Voyer, Alejandro, Valente, Luis
Publicada:
16 jun 2023
Ahead of Print:
1 dic 2022
Resumen:
While the theory of micro-evolution by natural selection assigns a
crucial role to competition, its role in macroevolution is less clear.
Phylogenetic evidence for a decelerating accumulation of lineages
suggests a feedback of lineage diversity on diversification. However,
does this feedback only occur between close relatives, or do distant
relatives also influence each other's diversification? In other words:
are there phylogenetic limits to this diversity-dependence? Islands form
ideal systems to answer these questions because their boundedness
facilitates an overview of all potential competitors. The DAISIE
(Dynamic Assembly of Island biota through Speciation Immigration and
Extinction) framework allows for testing the presence of
diversity-dependence on islands given phylogenetic data on colonization
and branching times. The current inference models in DAISIE assume that
this diversity-dependence only applies within a colonizing clade, i.e.,
all mainland species can colonize and diversify independently from one
another. We term this clade-specific (CS) diversity-dependence. Here we
introduce a new DAISIE model that assumes that diversity-dependence
applies to all island species of a taxonomic group regardless of their
mainland ancestry, i.e., diversity-dependence applies both to species
within the same clade and between different clades established by
different mainland species. We call this island-wide (IW)
diversity-dependence. We present a method to compute a likelihood for
this model given phylogenetic data on colonization and branching events
and use likelihood ratio bootstrapping to compare it to the likelihood
of the CS model in order to overcome biases known for standard model
selection. We apply it to the diversification of Eleutherodactylus frogs
on Hispaniola. Across the Greater Antilles archipelago, this radiation
shows repeated patterns of diversification in ecotypes that are similar
across clades. This could be suggestive of overlapping niche space and
hence between-clade interactions, i.e., IW diversity-dependence. But it
could also be suggestive of only within-clade interactions because
between-clade interactions would have blocked the same ecotype from
re-appearing. We find that the CS model fits the data much better than
the IW model, indicating that different colonizations while resulting in
similar ecotypes, are sufficiently distinct to avoid interacting
strongly. We argue that non-overlapping distributions between clades
(both spatially and in terms of ecotypes) cannot be used as evidence of
CS diversity-dependence, because this pattern may be a consequence of IW
diversity-dependence. By contrast, by using phylogenetic data rather
than distributional data our method does allow for inferring the
phylogenetic limits to diversity-dependent diversification. We discuss
possibilities for future extensions and applications of our modelling
approach. [Adaptive radiation; birth-death model; Caribbean;
diversity-dependence; Eleutherodactylus; island biogeography.]
Filiaciones:
Etienne, Rampal S.:
Univ Groningen, Groningen Inst Evolutionary Life Sci, Box 11103, NL-9700 CC Groningen, Netherlands
Haegeman, Bart:
Sorbonne Univ, CNRS, UMR7621 Lab Oceanog Microbienne, 1 Ave Pierre Fabre, F-66650 Banyuls Sur Mer, France
Dugo-Cota, Alvaro:
Donana Biol Stn EBD CSIC, Conservat & Evolutionary Genet Grp, Seville 41092, Spain
Vila, Carles:
Donana Biol Stn EBD CSIC, Conservat & Evolutionary Genet Grp, Seville 41092, Spain
Gonzalez-Voyer, Alejandro:
Univ Nacl Autonoma Mexico, Dept Evolutionary Ecol, Inst Ecol, Mexico City 04510, Mexico
Valente, Luis:
Univ Groningen, Groningen Inst Evolutionary Life Sci, Box 11103, NL-9700 CC Groningen, Netherlands
Nat Biodivers Ctr, Darwinweg 2, NL-2333 CR Leiden, Netherlands
hybrid, Green Published, Hybrid Gold, Green
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