Implications of headwater contact zones for the riverine barrier hypothesis: a case study of the Blue-capped Manakin (Lepidothrix coronata)

Back to summary metadata
dc.contributor.affiliationLouisiana State University-Brumfield, Robb
dc.contributor.authorBrumfield, Robb
dc.date.accessioned2025-04-29T14:04:33Z
dc.date.issued2023-10-18
dc.date.issued2023-10-18
dc.descriptionRivers frequently delimit the geographic ranges of species in the Amazon Basin. These rivers also define the boundaries between genetic clusters within many species, yet river boundaries have been documented to break down in headwater regions where rivers are narrower. To explore the evolutionary implications of headwater contact zones in Amazonia, we examined genetic variation in the Blue-capped Manakin (Lepidothrix coronata), a species previously shown to contain several genetically and phenotypically distinct populations across the western Amazon Basin. We collected restriction site-associated DNA sequence data (RADcap) for 706 individuals and found that spatial patterns of genetic structure indicate rivers, particularly the Amazon and Ucayali, are major dispersal barriers for L. coronata along a distance of more than 3000 km. We also found evidence that genetic connectivity is elevated across several headwater regions, highlighting the importance of headwater gene flow for models of Amazonian diversification. The headwaters of the Ucayali River provide a notable exception to findings of headwater gene flow by harboring non-admixed populations of L. coronata on opposite sides of a <1 km-wide river channel with a known dynamic history, potentially suggesting that additional prezygotic barriers are limiting gene flow in this region.
dc.identifierhttps://doi.org/10.5061/dryad.5tb2rbp9s
dc.identifier.urihttps://datakatalogi.helsinki.fi/handle/123456789/5932
dc.rights.licensecc-zero
dc.subjectMomi
dc.subjectEstimated Effective Migration Surface
dc.subjectEEMS
dc.subjectsNMF
dc.subjectLepidothrix coronata
dc.subjectFST
dc.titleImplications of headwater contact zones for the riverine barrier hypothesis: a case study of the Blue-capped Manakin (Lepidothrix coronata)
dc.typedataset

Files

Repositories

Zenodo