10.5061/DRYAD.7V1F8
Uribe-Convers, Simon
University of Idaho
Tank, David C.
University of Idaho
Data from: Shifts in diversification rates linked to biogeographic
movement into new areas: an example of a recent radiation in the Andes
Dryad
dataset
2016
Rhinantheae
Bartsia
dispersification
Orobanchaceae
Parentucellia
Páramo
Neobartsia
Bellardia
Miocene
2016-10-09T00:00:00Z
2016-10-09T00:00:00Z
en
https://doi.org/10.3732/ajb.1500229
305992246 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
PREMISE OF THE STUDY: Clade-specific bursts in diversification are often
associated with the evolution of key innovations. However, in groups with
no obvious morphological innovations, observed upticks in diversification
rates have also been attributed to the colonization of a new geographic
environment. In this study, we explore the systematics, diversification
dynamics, and historical biogeography of the plant clade Rhinantheae in
the Orobanchaceae, with a special focus on the Andean clade of the genus
Bartsia. METHODS: We sampled taxa from across Rhinantheae, including a
representative sample of Andean Bartsia species. Using standard
phylogenetic methods, we reconstructed evolutionary relationships,
inferred divergence times among the clades of Rhinantheae, elucidated
their biogeographic history, and investigated diversification dynamics.
KEY RESULTS: We confirmed that the South American Bartsia species form a
highly supported monophyletic group. The median crown age of Rhinantheae
was determined to be ca. 30 Myr, and Europe played an important role in
the biogeographic history of the lineages. South America was first
reconstructed in the biogeographic analyses around 9 Myr ago, and with a
median age of 2.59 Myr, this clade shows a significant uptick in
diversification. CONCLUSIONS: Increased net diversification of the South
American clade corresponds to biogeographic movement into the New World.
This movement happened at a time when the Andes were reaching the
necessary elevation to host an alpine environment. Although a specific
route could not be identified with certainty, we provide plausible
hypotheses to how the group colonized the New World.
Uribe-Convers_and_Tank_AJB_2015The data included in this directory was
used for every analysis in the publication "Shifts in diversification
rates linked to biogeographic movement into new areas, an example of
disparate continental distributions and a recent radiation in the
Andes" by Simon Uribe-Convers and David C. Tank (University of
Idaho), as part of Uribe-Convers' dissertation.
South America
Andes