Miranda Pless
Pronouns: she/they
Research Mentor(s): Jacob Berv
Co-Presenter:
Research Mentor School/College/Department: Ecology and Evolutionary biology, and Museum of Paleontology / LSA
Presentation Date: April 20
Presentation Type: Oral5
Session: Session 5 – 3:40pm – 4:30 pm
Room: Breakout Room 2
Authors: Miranda Pless, Jacob Berv
Presenter: 6
Abstract
A recent investigation of genetic diversity within the White-crowned Manakin (Pseudopipra pipra) suggested that this monotypic lineage is a species-complex containing up to 17 distinct groups (Berv et al, 2021). This prior work proposed a complex scenario of gene-flow among non-sister populations in the Western Amazon, likely as a product of the dynamic drainage history in that region. In order to better understand the evolutionary history among a broader sample of populations, we re-assessed the degree of admixture among all populations in a dataset consisting of up to ~24,00 SNPs derived from ddRAD sequencing. To estimate the history of gene-flow among 11 distinct phylogenetic lineages, we used the software D-Suite (Malinsky et a., 2021.) to calculate d-statistics, f4 ratios, and f-branch statistics. We also assessed variation across the genome and across populations using sliding window analyses. We detect little evidence of gene flow among geographically proximate populations, with the exceptions of some southeastern populations, as well as the previously proposed case involving populations in the western Napo area of endemism (Berv et al, 2021.). Overall, our results support the proposal that the White-crowned manakin is composed of many distinct phylogenetic species, and that rivers are an important factor in maintaining biodiversity in the Amazon basin.
Engineering, Natural/Life Sciences
