High dispersal ability versus migratory traditions: Fine-scale population structure and post-glacial colonization in bar-tailed godwits

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 lati..., , , # 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/pop...,