DOI: 10.5061/dryad.73n5tb352
title: Data from: High dispersal ability versus migratory traditions: Fine-scale population structure and post-glacial colonization in bar-tailed godwits

description: In migratory animals, high mobility may reduce population structure
 through increased dispersal and enable adaptive responses to environmental
 change, whereas rigid migratory routines predict low dispersal, increased
 structure, and limited flexibility to respond to change. We explore the
 global population structure and phylogeographic history of the bar-tailed
 godwit, Limosa lapponica, a migratory shorebird known for making the
 longest non-stop flights of any landbird. Using nextRAD sequencing of
 14,318 single-nucleotide polymorphisms and scenario-testing in an
 Approximate Bayesian Computation framework, we infer that bar-tailed
 godwits existed in two main lineages at the Last Glacial Maximum, when
 much of their present-day breeding range persisted in a vast, unglaciated
 Siberian-Beringian refugium, followed by admixture of these lineages in
 the eastern Palearctic. Subsequently, population structure developed at
 both longitudinal extremes: in the east, a genetic cline exists across
 latitude in the Alaska breeding range of subspecies L. l. baueri; in the
 west, one lineage diversified into three extant subspecies L. l.
 lapponica, taymyrensis, and yamalensis, the former two of which migrate
 through previously glaciated western Europe. In the global range of this
 long-distance migrant, we found evidence of both (1) fidelity to rigid
 behavioral routines promoting fine-scale geographic population structure
 (in the east), and (2) flexibility to colonize recently available
 migratory flyways and non-breeding areas (in the west). Our results
 suggest that cultural traditions in highly mobile vertebrates can override
 the expected effects of high dispersal ability on population structure,
 and provide insights for the evolution and flexibility of some of the
 world’s longest migrations.
description: # High dispersal ability versus migratory traditions: Fine-scale
 population structure and post-glacial colonization in bar-tailed godwits
 These data are associated with the publication: Conklin et al. 2024 High
 dispersal ability versus migratory traditions: fine-scale population
 structure and post-glacial colonization in bar-tailed godwits Molecular
 Ecology MEC-23-1193 Sample information: **Conklin_BARG_Metadata.xlsx**
 (see also Table S1 in online supplement) Variable descriptions: *
 organism: Latin name - sampleID: project-specific DNA sample identifier *
 sourceID: individual animal identifier, from sample source (individual
 flag code, metal band number, or museum sample identifier) - Collection
 date: date of tissue sample collection * season: time of year of sample
 collection (breeding or non-breeding season) - habitat: habitat of sample
 collection (tundra or intertidal) * sampling location: where collected
 (country: region/site) - a priori population: assumed
 subspecies/population before analysis * final population: assigned
 subspecies/population after analysis **VCF file: Conklin_BARG_184_14318**
 This file contains genotype data for the 184 individuals and 14318 SNPs
 used, after filtering, for final analyses in the manuscript. The dataset
 was created by SNPsaurus, LLC, USA, using nextRAD sequencing, as described
 in the manuscript. Column descriptions: \#CHROM: Chromosome number POS:
 Position of the SNP on the chromosome ID: na REF: Reference base ALT:
 Alternate base(s) QUAL: Quality score of the SNP FILTER: na INFO: na
 FORMAT: Data format Sample columns: One per individual, containing
 genotype information The raw short-read sequencing data are available on
 NCBI: BioProject ID PRJNA1118901. For further information, please contact
 Jesse Conklin at:
 [conklin.jesse@gmail.com](mailto:conklin.jesse@gmail.com)