6 Works

Data from: Extensive phenotypic diversification coexists with little genetic divergence and a lack of population structure in the White Wagtail subspecies complex (Motacilla alba)

Georgy A. Semenov, Evgeniy A. Koblik, Yaroslav A. Red'kin & Alexander V. Badyaev
Geographically clustered phenotypes often demonstrate consistent patterns in molecular markers, particularly mitochondrial DNA (mtDNA) traditionally used in phylogeographic studies. However distinct evolutionary trajectories among traits and markers can lead to their discordance. First, geographic structure in phenotypic traits and nuclear molecular markers can be co-aligned but inconsistent with mtDNA (mito-nuclear discordance). Alternatively, phenotypic variation can have little to do with patterns in neither mtDNA nor nuclear markers. Disentangling between these distinct patterns can provide insight...

Data from: Biological introduction threats from shipping in a warming Arctic

Chris Ware, Jørgen Berge, Anders Jelmert, Steffen M. Olsen, Loïc Pellissier, Mary Wisz, Darren Kriticos, Georgy Semenov, Slawomir Kwasniewski & Inger G. Alsos
Several decades of research on invasive marine species have yielded a broad understanding of the nature of species invasion mechanisms and associated threats globally. However, this is not true of the Arctic, a region where ongoing climatic changes may promote species invasion. Here, we evaluated risks associated with non-indigenous propagule loads discharged with ships' ballast water to the high-Arctic archipelago, Svalbard, as a case study for the wider Arctic. We sampled and identified transferred propagules...

Data from: Genomic variation across two barn swallow hybrid zones reveals traits associated with divergence in sympatry and allopatry

Elizabeth S.C. Scordato, Matthew R. Wilkins, Georgy Semenov, Alexander S. Rubtsov, Nolan C. Kane, Rebecca J. Safran & Elizabeth S. C. Scordato
Hybrid zones are geographic regions where isolating barriers between divergent populations are challenged by admixture. Identifying factors that facilitate or inhibit hybridization in sympatry can illuminate the processes that maintain those reproductive barriers. We analyzed patterns of hybridization and phenotypic variation across two newly-discovered hybrid zones between three subspecies of barn swallow (Hirundo rustica). These subspecies differ in ventral coloration and wing length, traits that are targets of sexual and natural selection, respectively, and are...

Data from: Effects of assortative mate choice on the genomic and morphological structure of a hybrid zone between two bird subspecies

Georgy A. Semenov, Elizabeth S.C. Scordato, David R. Khaydarov, Chris C.R. Smith, Nolan C. Kane, Rebecca J. Safran & Elizabeth S. C. Scordato
Phenotypic differentiation plays an important role in the formation and maintenance of reproductive barriers. In some cases, variation in a few key aspects of phenotype can promote and maintain divergence; hence the identification of these traits and their associations with patterns of genomic divergence are crucial for understanding the patterns and processes of population differentiation. We studied hybridization between the alba and personata subspecies of the white wagtail (Motacilla alba), and quantified divergence and introgression...

Data from: Winter coat color polymorphisms identify global hotspots for evolutionary rescue from climate change

L. Scott Mills, Eugenia V. Bragina, Alexander V. Kumar, Marketa Zimova, Diana J.R. Lafferty, Jennifer Feltner, Brandon M. Davis, Klaus Hacklander, Paulo C. Alves, Jeffrey M. Good, Jose Melo-Ferreira, Andreas Dietz, Alexei V. Abramov, Natalia Lopatina & Kairsten Fay
Maintenance of biodiversity in a rapidly changing climate will depend on the efficacy of evolutionary rescue, whereby population declines due to abrupt environmental change are reversed by shifts in genetically-driven adaptive traits. However, a lack of traits known to be under direct selection by anthropogenic climate change has limited the incorporation of evolutionary processes into global conservation efforts. In 22 vertebrate species, some individuals undergo a seasonal color molt from summer brown to winter white...

Taxon pulse dynamics, episodic dispersal, and host colonization across Beringia drive diversification of a holarctic tapeworm assemblage

Genevieve Haas, Eric Hoberg, Joseph Cook, Heikki Henttonen, Arseny Makarikov, Sarah Gallagher, Nikolai Dokuchaev & Kurt Galbreath
Aim: We test the predictions of the Stockholm Paradigm, a synthesis of eco-evolutionary theory explaining the nature of faunal assembly, host range and parasite diversification. Faunal diversification and assembly, manifested in patterns of host colonization, co-adaptation and parasite speciation, is predicted to emerge as a consequence of alternating episodes of ecological disruption and stability. Specifically, for a diverse cestode genus (Arostrilepis), we evaluate the number and direction of Pleistocene dispersal events across Beringia, the number...

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Affiliations

  • Institute of Systematics and Ecology of Animals
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  • University of Colorado Boulder
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  • Polish Academy of Sciences
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