GPS tracking and population genomics suggest itinerant breeding across drastically different habitats in the Phainopepla

Daniel T. Baldassarre, Leonardo Campagna, Henri A. Thomassen, Jonathan W. Atwell, Miyoko Chu, Lisa H. Crampton, Robert C. Fleischer, Christina Riehl

Research output: Contribution to journalArticlepeer-review

Abstract

Migratory birds generally divide the annual cycle between discrete breeding and nonbreeding ranges. Itinerant breeders, however, reproduce twice at different geographic locations, migrating between them. This unusual flexibility in movement ecology and breeding biology suggests that some species can rapidly modulate the conflicting physiological and behavioral traits required for migration and reproduction. The Phainopepla (Phainopepla nitens), a songbird of the southwestern USA, has long been suspected to breed first in desert habitats in spring, then migrate to woodland habitats to breed again in summer. However, direct evaluation of movement and gene flow among individuals breeding in different locations has previously been logistically intractable. We deployed GPS tags on free-flying Phainopeplas in southern California, all of which migrated to hypothesized woodland breeding habitats after desert breeding (an average distance of 232 km). GPS data also revealed previously unknown fall and spring stopover sites. Population genomic analyses revealed no genetic differentiation among desert and woodland breeding populations, indicating significant movement and gene flow across the region. Finally, we used random forest analyses to quantify substantial environmental differences among temporal stages. Our results provide direct evidence that individual Phainopeplas do indeed move between 2 drastically different breeding habitats in the same year, representing a rare and extreme example of life-history flexibility.

Original languageEnglish (US)
Article numberukz058
JournalAuk
Volume136
Issue number4
DOIs
StatePublished - Oct 17 2019

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Keywords

  • GPS tracking
  • Phainopepla
  • Phainopepla
  • bosques aleatorios
  • genómica poblacional
  • historia de vida
  • itinerant breeding
  • life history
  • population genomics
  • random forest
  • rastreo por GPS
  • reproducción itinerante

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