DOI: 10.5061/dryad.z612jm6hz
title: Data from: Passerine sister clade comparisons reveal variable macroevolutionary outcomes of interhemispheric dispersal

description: Dispersal events offer a unique window into macroevolutionary processes.
 While several hypotheses predict alternative outcomes from such events,
 many empirical studies have been limited in geographic and phylogenetic
 scale. Here, we tested some of these hypotheses by comparing an assemblage
 of 16 oscine passerine clades, representing independent dispersal events
 into the Western Hemisphere, to their sister clades in the Eastern
 Hemisphere. We also compared the diversity of this assemblage of clades to
 an older, incumbent passerine clade in the Western Hemisphere, the
 suboscines. We tested for ecological opportunity and incumbency-mediated
 constraints versus neutrality by integrating estimates of clade-specific
 morphological disparities with models of multivariate regimes of trait
 evolution. While there was no consistent outcome of oscine dispersal and
 macroevolution in the Western Hemisphere relative to their Eastern
 Hemisphere sister groups, most clades supported a role for ecological
 opportunity or incumbency effects, and such effects were better explained
 by differences in species accumulation than by differences in rates of
 trait evolution or colonization timing. However, we found that this
 general pattern was not evident when comparing the entire oscine
 assemblage of the Western Hemisphere to the incumbent suboscine clade.
 Oscines and suboscines occupy comparable regions of functional trait
 diversity and, despite oscines possessing higher rates of trait evolution,
 these observations were consistent with simulated null expectations. This
 result suggests that oscine and suboscine assemblages most likely evolved
 in relative isolation until 5-10 million years ago, with oscines primarily
 in North America and suboscines in South America, which limited incumbency
 effects of the autochthonous suboscine radiation on subsequent oscine
 diversification.
description: DATA FOR: Macroevolutionary outcomes of repeated transcontinental
 dispersal by passerines into the Americas Tyler S. Imfeld and F. Keith
 Barker DATA FILES: 1. IOCJetzNames\_AgeWork.csv A csv file containing a
 list of species with their IOC checklist name, their name in the Jetz et
 al. 2012 phylogeny, and to what clade they belong to as part of this
 study. Species with values of "NA" in the 'Jetz Name'
 column are recognized on the IOC checklist but are not included in the
 Jetz et al. 2012 phylogeny. 2. JetzTree\_SequenceList.csv A csv file
 containing a list of the species included in the Jetz et al. 2012
 phylogeny, whether each species is represented by sequence data, and
 GenBank accession numbers for each sequence used for these species. 3.
 AppendixTable1.csv A csv file containing the raw morphometric data
 measured from study skins used in this study, including the measurements
 from Imfeld and Barker 2022. Complete methods for data collection are
 included in the manuscript and appendix. But, briefly, columns contain the
 following data: 'Species' is that species' scientific name.
 'Lineage' is the clade to which that species belongs in this
 study. 'SpecimenID' contains two pieces of information: the
 abbreviation of the museum collection (as in the main manuscript) and the
 actual specimen number. 'Mass' was recorded in grams exactly as
 it appeared on the specimen's tag; NA indicates that mass was not
 recorded. The remaining columns contain linear measurements following
 Baldwin et al. 1931 and are explained at greater length in the manuscript
 text. All measurements of the bill and hindlimb (tarsus & hallux)
 were taken with Mitutoyo digital calipers, and the wing and tail length
 were taken with a standard wing rule. These measurements are recorded in
 millimeters. Full measurement names, in order, as follows: Length of
 Exposed Culmen, Length of Bill from Nares, Width of Bill at Nares, Depth
 of Bill at Nares, Width of Bill at Base, Depth of Bill at Base, Length of
 Tarsus, Length of Hallux, Length of Closed Wing, Length of Tail. 4.
 WHEH\_CladeData.csv A csv file containing clade-specific information about
 age and functional trait diversity. In all columns, 'WH' and
 'EH' represent the Western and Eastern Hemisphere clades,
 respectively. 'Clade' conlumns contain the names of the =
 clades, respectively. 'Hyp' columns contain the 4-dimensional
 kernel density hypervolume disparities calculated for each clade on PC1-4.
 'Overlap' contains the shared hypervolume occupied by the clade
 pair and 'Sum' contains the total hypervolume (union) occupied
 by the pair. 'ScaledDiff' contains the scaled difference in
 hypervolume occupied between the WH and EH clades. 'Unique'
 columns contain the hypervolume disparity uniquely occupied by either
 clade in the clade pair. 'PropOL' columns contain proportion of
 clade-specific hypervolume that's shared between each clade's
 sister clade, calculated as the hypervolume overlap between clades divided
 by each clade-specific hypervolume. 'Spp' columns contain the
 species richness of each clade. 'Crown' contains the crown age
 of the WH clade in millions of years, and 'Stem' contains the
 stem age of the sister clade pair in millions of years.
 'SppDiff' contains the difference in species richness between
 the WH and EH clades. TREE FILES: 1. PasseriformesMCC.tre A NEWICK
 formatted tree file containing an MCC tree that was generated from a
 distribution of 1,000 Stage II Hackett et al. backbone trees downloaded
 from birdtree.org. Code in the R scripts below prune the tree to contain
 only species placed with sequence data (Stage I). 2.
 HackettS2\_Trees.RData An .RData file that will load the original
 distribution of 1,000 Stage II Hackett et al. backbone trees downloaded
 from birdtree.org. Code in R script 1.5 will prune the tree to contain
 only species placed with sequence data (Stage I). R SCRIPTS AND RDATA
 FILES: 1. 1\_WHEH\_Oscine\_Analyses.R An R script containing all of the
 morphometric data analysis, model fitting, and simulations for comparing
 Western and Eastern hemisphere oscine sister clades. 2.
 1.5\_WHEH\_mvMORPH\_Distribution.R An R script that will fit the mvMORPH
 models to a distribution of Jetz et al. trees to assess how robust model
 fitting results are to phylogenetic uncertainty. 3.
 2\_OscineSuboscine\_Analyses.R An R script containing all of the
 morphometric data analysis, model fitting, and simulations for comparing
 the Western Hemisphere oscine assemblage and the Western Hemisphere
 suboscine clade. 4. All\_OscSub\_Simulations.RData An RData file
 containing the cumulative simulated posterior from parallelized cluster
 runs for comparing Western and Eastern Hemisphere oscine sister clades. 5.
 All\_WHEH\_Simulations.RData An RData file containing the cumulative
 simulated posterior from parallelized cluster runs for comparing the
 oscine assemblage and suboscine clade in the Western Hemisphere.